Alternatives to create-api.dev
Compare create-api.dev alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to create-api.dev in 2026. Compare features, ratings, user reviews, pricing, and more from create-api.dev competitors and alternatives in order to make an informed decision for your business.
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1
KrakenD
KrakenD
KrakenD is a high-performance API Gateway optimized for resource efficiency, capable of managing 70,000 requests per second on a single instance. The stateless architecture allows for straightforward, linear scalability, eliminating the need for complex coordination or database maintenance. It supports various protocols and API specifications, with features like fine-grained access controls, data transformation, and caching. Unique to KrakenD is its ability to aggregate multiple API responses into one, streamlining client-side operations. Security-wise, KrakenD aligns with OWASP standards and doesn't store data, making compliance simpler. It offers a declarative configuration and integrates with third-party logging and metrics tools. With transparent pricing and an open-source option, KrakenD is a comprehensive API Gateway solution for organizations prioritizing performance and scalability. -
2
Blackbird API Development
Ambassador
Accelerate Development of Prod-Ready APIs. AI-Powered Code Gen, Mocking in Minutes, and On-Demand Ephemeral Test Environments. * Design Efficiently: Generate standardized OpenAPI specs with AI assistance, allowing you to begin coding faster. * Mock Effortlessly: Create shareable API mocks without manual coding, enabling rapid validation. * Automate Repetitive Tasks: Utilize AI to automatically generate boilerplate code for both client and server-side APIs. * Test Effectively: Access publicly available URLs for testing in a production-like test environment through Blackbird's ephemeral testing environments. * Debug Seamlessly: Set breakpoints and debug directly from your preferred IDE with Blackbird's integrated debugging tools. * Deploy Smoothly: Utilize a 24/7 hosted environment for progressive and repeated testing without reconfiguration, facilitated by Blackbird's containerized deployment.Starting Price: $69/month -
3
Tyk
Tyk Technologies
Tyk is a leading Open Source API Gateway and Management Platform, featuring an API gateway, analytics, developer portal and dashboard. We power billions of transactions for thousands of innovative organisations. By making our capabilities easily accessible to developers, we make it fast, simple and low-risk for big enterprises to manage their APIs, adopt microservices and adopt GraphQL. Whether self-managed, cloud or a hybrid, our unique architecture and capabilities enable large, complex, global organisations to quickly deliver highly secure, highly regulated API-first applications and products that span multiple clouds and geographies.Starting Price: $600/month -
4
Gravitee.io
Gravitee.io
Gravitee.io is the easiest to use, most performant and cost-effective Open Source API Platform that helps your organization to secure, publish and analyze your APIs. Use the power of Gravitee.io to manage identities with our OAuth2, OpenID Connect (OIDC) and Financial-grade API (FAPI) certified server. Gravitee.io APIM is a flexible, lightweight and blazing-fast open source API Management solution that helps your organization control finely who, when and how users access your APIs. With strong governance features such as API review and API quality and our market leading API designer, Gravitee.io enables you to design, manage, deploy and monitor your APIs in a secure and governed way. A branded Gravitee.io portal enables your API consumers to fully engage with your business - delivering high quality engagement for your business in the digital age.Starting Price: $2500 per month -
5
Postman
Postman
The collaboration platform for API development. Simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Postman is a collaboration platform for API development. Postman's features simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Quickly and easily send REST, SOAP, and GraphQL requests directly within Postman. Automate manual tests and integrate them into your CI/CD pipeline to ensure that any code changes won't break the API in production. Communicate the expected behavior of an API by simulating endpoints and their responses without having to set up a backend server. Generate and publish beautiful, machine-readable documentation to make your API easier to consume. Stay up-to-date on the health of your API by checking performance and response times at scheduled intervals. Provide a shared context for building and consuming APIs, and collaborate in real-time.Starting Price: $12 per user per month -
6
Amazon API Gateway
Amazon
Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. APIs act as the "front door" for applications to access data, business logic, or functionality from your backend services. Using API Gateway, you can create RESTful APIs and WebSocket APIs that enable real-time two-way communication applications. API Gateway supports containerized and serverless workloads, as well as web applications. API Gateway handles all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls, including traffic management, CORS support, authorization and access control, throttling, monitoring, and API version management. API Gateway has no minimum fees or startup costs. You pay for the API calls you receive and the amount of data transferred out and, with the API Gateway tiered pricing model, you can reduce your cost as your API usage scales.Starting Price: $0.90 -
7
RepreZen API Studio
RepreZen
Build APIs that click with client apps. RepreZen API Studio is an integrated workbench that brings API-first design into focus for your whole team, harmonizes your API designs, and generates APIs that click into client apps. Effortlessly. Full-featured OpenAPI editor with content assist, customizable templates, outline navigation & more for fast, focused API design. Live documentation view gives you immediate clarity & insight from the API user's perspective. Interactive diagram lets you visualize the API as you design. Generate & view in any browser to give API users a fast, intuitive overview. Split a large Swagger API spec into multiple files, even share & reuse API components across projects & teams! Edit, navigate, document & generate, all fully compliant with OpenAPI standards. Consolidate & simplify complex multi-file projects to a single file, for easy downstream code generation & docs presentation.Starting Price: $22 per month -
8
Specmatic
Specmatic
Specmatic offers a no-code, specification-driven, visual approach to API testing by leveraging API specifications to automatically execute positive and negative tests. Specmatic Studio offers broad format and protocol support across REST, SOAP, GraphQL, gRPC, WebSockets, and asynchronous messaging systems (message queues and event-driven APIs). The platform provides a comprehensive toolkit for API development and testing, utilizing specs as the single source of truth. Key features include: • Contract testing across various protocols • Service virtualization and mocking • Workflow and resiliency testing • Backward compatibility checks to prevent breaking changes • Open-source testing tools for OpenAPI, MCP and SOAP • Postman collection import for spec creation Specmatic focuses on functional correctness, contract compliance, resiliency, and compatibility testing. Genie assists API design, enabling interactive validation of the API spec prior to generating an MCP server.Starting Price: $2500 per month (50 seats) -
9
API Agent
IBM
API Agent in IBM API Connect is a watsonx.ai–powered assistant that automates core tasks across the entire API lifecycle via a natural‑language, conversational interface. Built on an agentic framework, it lets teams rapidly generate OpenAPI specifications, mocked responses, and rich documentation for design‑first projects, or connect to backend data sources, build application code, and auto‑deploy to Code Engine for code‑first workflows, all without manual setup. To combat API sprawl, API Agent intelligently searches your existing API catalog by simple description prompts, recommending reusable endpoints and reducing duplication. It enforces governance by validating specs against organizational rulesets, suggesting or applying fixes automatically, and boosts quality with a built‑in testing suite that generates and runs semantic test cases to catch issues early. -
10
Redocly
Redocly
Beautiful API documentation loved by teams and API consumers. At last, API documentation your whole team will be proud of. Publish beautiful API reference docs in seconds and style them in minutes. Tick every developer's favorite box right out of the box, three panels, a try-it console, generated code samples, SEO-friendly, even friendlier search. Nobody likes outdated docs and scope creep. Maintain API documentation with your favorite source control integrated with our cloud app workflows. We support them all, including on-premise and API management providers. Launch a developer portal in minutes reusing your API definitions as assets. Add tutorials, quick-start guides, and developer tooling with incredible customization. Validate, lint, and bundle multi-file API definitions. Write always on-spec OpenAPI documents. Plug in your API reference and customize every nook & cranny to wow your API consumers.Starting Price: $69 per month -
11
Google Cloud Endpoints
Google
Develop, deploy, protect, and monitor your APIs with Cloud Endpoints. An NGINX-based proxy and distributed architecture give unparalleled performance and scalability. Using an OpenAPI Specification or one of our API frameworks, Cloud Endpoints gives you the tools you need for every phase of API development and provides insight with Cloud Logging, Cloud Monitoring, and Cloud Trace. Control who has access to your API and validate every call with JSON Web Tokens and Google API keys. Integration with Auth0 and Firebase Authentication lets you identify the users of your web or mobile application. Extensible Service Proxy delivers security and insight in less than 1 ms per call. Deploy your API automatically with App Engine and Google Kubernetes Engine, or add our proxy container to your Kubernetes deployment. Monitor critical operations metrics in Google Cloud Console, and gain insight into your users and usage with Cloud Trace, Cloud Logging, and BigQuery. -
12
Insomnia
Kong
Design, debug, and test APIs like a human, not a robot. Finally, a workflow you'll love. The Collaborative API Design Tool for designing, testing and managing OpenAPI specifications. The Desktop API client for REST and GraphQL. Make requests, inspect responses. Quickly create and group requests, specify environment variables, authentication, generate code snippets, and more. Get all the details on responses. View the whole request timeline, status codes, body, headers, cookies, and more. Create workspaces, folders, environments, drag-and-drop requests, and easily import and export your data. Create, edit, lint, debug, preview, and manage all of your OpenAPI specs in one collaborative API design editor. Generate configuration for common API gateways such as the Kong API Gateway, and Kong for Kubernetes. Sync your API designs with source control such as Github / Gitlab, and deploy directly to API Gateways such as Kong with one click.Starting Price: $5 per month -
13
ATA
ATA
ATA is an AI-powered API management platform that centralizes design, testing, governance, documentation, and lifecycle workflows into a single intelligent workspace to help teams design, build, test, maintain, and govern APIs with higher quality and collaboration. It keeps API code, design documentation, specifications, test cases, and release notes in sync, reducing manual effort and drift while supporting OpenAPI specs, mock servers for frontend progress without backend readiness, and scheduled API monitoring to detect slow responses, timeouts, or failures early. It includes a Developer Studio for design-first OpenAPI creation and version control, E2E Test Automation with AI-generated robustness and security tests, mock servers, chained API workflows, and UI automation testing, and a Documentation Portal that centralizes API docs with multi-editor support, version management, secure access control, and auto-linked live endpoints. -
14
Apitive Studio
Apitive
Design, Document, Mock and Publish your APIs in OpenAPI 3.0 specification. A sleek UI that allows its users to design REST APIs intuitively. Product managers can now be less or notdependent on engineering teams to create API designs; thus increasing time to market. Workbench includes a refined review tool that allows users to submit their API designs for peer reviews. Achieve enterprise wide interface design standardization with Apitive Studio by creating reusable data models and global policies. Share them across various products and provide uniformity in your API Designs and Implementations. API designs are only as good as its document. Auto generate complete API documentation as web pages that provides both technical and business documentation to its consumers. Apitive Studio also deploys the documentation as a portal at pre-defined location for consumption saving time and effort. Socialize your APIs with external consumers and get instant validation. -
15
Zuplo
Zuplo
We’re reinventing API & MCP management for everybody, from startups to enterprises. Add authentication, analytics, rate-limiting, and developer documentation to your APIs and MCP servers in minutes. Protect your API by adding rate-limiting with Zuplo in minutes, and add over 50 available plugins like authentication to your API with a single click. Zuplo was built on the edge and deployed to +300 data centers in the world, which makes multi-cloud deployments first-class. With Zuplo you can run different workloads in different clouds while enforcing a unified set of security policies. Zuplo is the only API gateway that runs your OpenAPI spec directly. Leverage the OpenAPI ecosystem to build your API, and then deploy it to Zuplo without additional configuration. Zuplo automatically generates beautiful docs for your API. You can customize the docs with markdown and devs can self-serve API Keys directly from your docs. You can also directly generate hosted MCP servers from your OpenAPI.Starting Price: $0 per month -
16
Apidog
Apidog
Apidog is a complete set of tools that connects the entire API lifecycle, helping R&D teams implement best practices for API Design-first development. Design and debug APIs in a powerful visual editor. Describe and debug easily with JSON Schema support. Automate API lifecycle with Apidog's test generation from API specs, visual assertion, built-in response validation, and CI/CD. Generate visually appealing API documentation, publish to custom domain or securely share with collaborative teams. Local and cloud mock engine generate reasonable mock data according to field names and specifications without writing scripts. Quality tools have the power to unite your entire team, while ensuring that no task is needlessly repeated. Effortlessly describe your API as you test it, and generate JSON/XML schemas with a simple click. Generate test cases from APIs, add assertions visually, and create test scenarios with branches and iterations easily.Starting Price: $9 per user per month -
17
AutoRest
Microsoft
The AutoRest tool generates client libraries for accessing RESTful web services. Input to AutoRest is a spec that describes the REST API using the OpenAPI specification format and streamlines the creation of client code across multiple programming languages, including C#, Java, Python, TypeScript, and Go. This automation enhances consistency and efficiency in API consumption, reducing the manual effort required to develop and maintain client libraries. AutoRest operates through a flexible pipeline that processes OpenAPI input files, transforming them into a code model which is then utilized by language-specific generators to produce client code adhering to each language's design guidelines. The tool supports both OpenAPI 2.0 and 3.0 specifications, ensuring compatibility with a wide range of APIs. Developers can install AutoRest on Windows, macOS, or Linux systems, with installation facilitated via Node.js.Starting Price: Free -
18
SwaggerHub
SmartBear
SwaggerHub is an integrated API design and documentation platform, built for teams to drive consistency and discipline across the API development workflow. Accelerate your team’s design process without any loss in quality or organizational style consistency with a powerful Editor that’s fully compliant with the latest Swagger (OpenAPI) standards. A Powerful Editor equipped with smart error feedback and syntax auto-completion. Style Validators for ensuring design consistency across multiple APIs. API Mocking to virtualize operations without any code. Domains for storing, reusing and referencing common OAS syntax across multiple APIs. Have your API design and development centralized on a single location, allowing your teams to seamlessly collaborate on new APIs, or discover existing APIs on a centralized platform. Coordinate your entire API lifecycle from a central internal repository, hosted on the cloud.Starting Price: $90 per month -
19
Scalar
Scalar
Scalar is a modern, open source API platform designed to help developers create, document, test, and manage APIs through a unified, interactive environment built around the OpenAPI standard. It transforms OpenAPI specifications into clean, visually appealing, and interactive API documentation that allows users to explore endpoints and test requests directly within the interface, combining documentation and a full-featured API client in one place. It includes a built-in REST API client that supports sending requests, inspecting responses, handling authentication methods such as API keys and OAuth2, and working with environment variables and dynamic parameters. Scalar also offers tools for generating SDKs, managing and versioning API specifications with Git integration, and creating documentation that stays synchronized with the underlying API through Markdown or MDX workflows.Starting Price: Free -
20
Astra Platform
Astra Platform
A single line of code to supercharge your LLM with integrations and without complex JSON schemas. Spend minutes, not days adding integrations to your LLM. With only a few lines of code, the LLM can perform any action in any target app on behalf of the user. 2,200 out-of-the-box integrations. Connect with Google Calendar, Gmail, Hubspot, Salesforce or more. Manage authentication profiles so your LLM can perform actions on behalf of your users. Build REST integrations or easily import from a OpenAPI spec. Function calling requires the foundation model to be fine-tuned which can be expensive and diminish the quality of your output. Enable function calling with any LLM, even if it's not natively supported. With Astra, you can build a seamless layer of integrations and function execution on top of your LLM, extending its capabilities without altering its core structure. Automatically generate LLM-optimized field descriptions. -
21
Swagger
SmartBear
Simplify API development for users, teams, and enterprises with the Swagger open source and professional toolset. Find out how Swagger can help you design and document your APIs at scale. The power of Swagger tools starts with the OpenAPI Specification — the industry standard for RESTful API design. Individual tools to create, update and share OpenAPI definitions with consumers. SwaggerHub is the platform solution to support OpenAPI workflows at scale. Swagger open source and pro tools have helped millions of API developers, teams, and organizations deliver great APIs. Swagger offers the most powerful and easiest to use tools to take full advantage of the OpenAPI Specification. -
22
Procurement Service Bus (PSB)
eConnect
The Procurement Service Bus (PSB) provides a cloud managed connection to eDelivery networks like the Peppol network. Specially designed for large volumes and low latency with automatic scaling. Build with redundancy and high availability in mind. The shared cloud approach is centrally monitored for optimal utilization and predictable costs. Additional services are available, like target-transformation, automatic retry and party discovery. The Procurement Service Bus is more than just an AccessPoint As A Service (APAAS). We connect the Peppol network with the enterprise systems. The interface is based on REST with OAUTh 2.0 layer. The API’s are self explanatory and made visible with the OpenApi UI. The swagger.json file can be downloaded on top of the OpenAPI UI main page and can be used to generate code for several languages. If you choose to generate code, we recommend using OpenAPI Generator. -
23
Gentoro
Gentoro
Gentoro is a platform built to empower enterprises to adopt agentic automation by bridging AI agents with real-world systems securely and at scale. It uses the Model Context Protocol (MCP) as its foundation, allowing developers to automatically convert OpenAPI specs or backend endpoints into production-ready MCP Tools, without writing custom integration code. Gentoro takes care of runtime concerns like logging, retries, monitoring, and cost optimization, while enforcing secure access, auditability, and governance policies (e.g., OAuth support, policy enforcement) whether deployed in a private cloud or on-premises. It is model- and framework-agnostic, meaning it supports integration with various LLMs and agent architectures. Gentoro helps avoid vendor lock-in and simplifies tool orchestration in enterprise environments by managing tool generation, runtime, security, and maintenance in one stack. -
24
Gram
Speakeasy
Gram is an open source platform that enables developers to create, curate, and host Model Context Protocol (MCP) servers effortlessly, by transforming REST APIs (via OpenAPI specs) into AI-agent-ready tools without code changes. It guides users through a workflow: generating default tooling from API endpoints, scoping down to relevant tools, composing higher-order custom tools by chaining multiple calls, enriching tools with contextual prompts and metadata, and instantly testing within an interactive playground. With built-in support for OAuth 2.1 (including Dynamic Client Registration or user-authored flows), it ensures secure agent access. Once ready, these tools can be hosted as production-grade MCP servers, complete with centralized management, role-based access, audit logs, and compliance-ready infrastructure, including Cloudflare edge deployment and DXT-packaged installers for easy distribution.Starting Price: $250 per month -
25
Hanabi.rest
Hanabi.rest
Hanabi.rest is an AI-based API building platform. Hanabi.rest creates multi-runtime APIs for web standards. In addition to operating on a live editor on the web, it generates code that works with Cloudflare, Fastly, Deno, Bun, Lagon, AWS, or Node.js. Build a REST API from natural language and screenshots using AI, deploy it on Cloudflare Workers, and immediately roll it out globally. Generates REST APIs from natural language and screenshots. With the live API editor, you can test database access and API endpoints from a sandboxed, secure environment. Share the created APIs using a URL. Publicly available APIs can be forked and further expanded or improved based on natural language. APIs created or shared can be dumped locally via CLI, allowing you to immediately set up a project for development and deployment. Simply import the npm package running in the environment as usual and the type definitions will be downloaded automatically. -
26
OpenLegacy
OpenLegacy
OpenLegacy enables organizations with legacy systems to release new digital services faster and more efficiently than ever before. It connects directly to even the most complex legacy systems, bypassing the need for extra layers of technology. Our product, OpenLegacy HUB is an all-in-one enterprise digital and cloud modernization platform, without disruption. With the OpenLegacy Hub, organizations can automatically generate digital services from any legacy source, deploy them to any cloud environment or framework, extend their functionality, add business logic, and manage these legacy assets in a reusable, discoverable, and easy-to-use way, all without any changes to the underlying legacy applications. 2022 New! OpenLegacy is available on AWS Marketplace.Starting Price: $12K/monthly -
27
OpenAPI Generator
OpenAPI Generator
OpenAPI Generator is an open-source tool that automatically generates client libraries, server stubs, API documentation, and configuration files from an OpenAPI Specification (OAS) document. It supports a wide range of programming languages and frameworks, making it easier for developers to integrate APIs into their applications. By automating the creation of boilerplate code, OpenAPI Generator reduces development time and ensures consistency in API interactions. It allows teams to focus on implementing business logic rather than dealing with repetitive tasks like data serialization, deserialization, and HTTP request handling. The tool is widely used in API-driven development, enabling seamless integration of third-party services and simplifying the process of keeping API consumers and providers in sync.Starting Price: Free -
28
NoCodeBackend
NoCodeBackend
NoCodeBackend is a user-friendly, AI-powered platform that enables the rapid development of production-ready APIs without writing any code. Users can quickly configure databases, tables, and columns through an intuitive interface, with the system automatically generating corresponding API endpoints. NoCodeBackend's AI-assisted prompt technology allows users to describe their desired API functionality, and the system takes care of the rest, streamlining the development process. Additionally, NoCodeBackend offers automated documentation generation using Swagger, ensuring clear and comprehensive API documentation for a seamless developer experience. Starting Price: $49 per month -
29
Hubql
Hubql
Hubql is your local-first API Client to test, share, document and ship APIs faster. Start with any OpenAPI spec either through introspection via URL or using our server libraries passing your API schema. Hubql is built as local-first library storing your data offline. Our API client runs in browser only either as a local server plugin for example as NestJS plugin or distributed directly via CDN as JS library. Organize your APIs in workspaces and Hubs. Share your API Hubs with your team members and collaborate on the same API collection. Store your environment variables in your workspace and use them in your API requests. No need to copy-paste your variables anymore. -
30
42Crunch
42Crunch
Your most valuable intelligence isn’t AI, it’s your developers. Empower them with tools to be the driving force behind API security – ensuring continuous, unparalleled protection across the entire API lifecycle. Push your OpenAPI definition to your CI/CD pipeline and automatically audit, scan and protect your API. Audit your OpenAPI / Swagger file against 300+ security vulnerabilities, we’ll rank them by severity level and tell you exactly how to fix them – making security a seamless part of your development lifecycle Enforce a zero-trust architecture by ensuring all your APIs meet a set security standard before production, scan the live API endpoints for potential vulnerabilities, and automate redeployment. Ensure security of all your APIs from design to deployment, get detailed insight about attacks on APIs in production – and protect against threats – without impacting performance. -
31
Crow
Crow
Crow, the language user interface for modern software, is a developer-focused platform that makes it easy to embed a fully functional AI copilot directly into your application with minimal effort. Instead of building a chatbot or copilot from scratch, wiring backend endpoints, designing UI, managing user state, handling context, and enabling tool calls, Crow handles all of that for you. You simply add a small script to your frontend, and Crow does the rest; it connects to your backend endpoints, converts registered APIs (via OpenAPI specs or endpoint URLs) into callable tools, and manages authentication so that AI-driven actions respect your existing user permissions. To give the copilot real context, Crow lets you ingest website content, documentation, or arbitrary files so the AI can answer domain-specific questions accurately. Once configured, the copilot can not only respond conversationally, but also execute actions, for example, reading or writing data. -
32
SwytchCode
SwytchCode
SwytchCode is an AI-powered “solutions engineer” platform that transforms API and SDK documentation into interactive developer experiences. It allows API publishers to upload an OpenAPI spec, Postman collection, or SDK, and within minutes, the system generates multilingual code samples (15+ programming languages), live playgrounds, and ready-to-run workflows that reduce developer integration time from hours to under two minutes. It supports smart testing with mock calls, analytics to surface developer drop-off or usage issues, and multi-step workflow generation via drag-and-drop or natural-language prompts, enabling API teams to significantly reduce support costs and improve adoption while maintaining high uptime and broad language support. With a mission to eliminate friction between APIs and developers, SwytchCode is a unified AI-driven interface that sits alongside your API.Starting Price: $19 per month -
33
tap
Digital Society
Turn spreadsheets and data files into production-ready APIs without writing backend code. Upload CSV, JSONL, Parquet and other formats, clean and join them with familiar SQL, and expose secure, documented endpoints instantly. Built-in features include auto-generated OpenAPI docs, API key security, geospatial filters with H3 indexing, usage monitoring, and high-performance queries. You can also download transformed datasets anytime to avoid vendor lock-in. Works for single files, combined datasets, or public data portals with minimal setup. Key features - Create secure, documented APIs directly from CSV, JSONL, and Parquet. - Run familiar SQL queries to clean, join, and enrich data. - No backend setup or servers to configure or maintain. - Auto-generated OpenAPI documentation for every endpoint you create. - Secure endpoints with API keys and isolated storage for safety. - Geospatial filters, H3 indexing, and fast, optimised queries at scale.Starting Price: $10/month -
34
SOAPSonar
Crosscheck Networks
Validate the functional behavior of APIs with client input simulations. Success criteria rules provide validation and regression testing of API behavior. Tests can be run on-demand or automated. Supports latest OpenAPI standards for automatically parsing OpenAPI documents and building test cases for all of the defined operations. Test authentication schemes including OAuth, SAML, PKI, Basic Auth, Amazon Auth, and Kerberos. Verify SSO tokens and cookies. Create behavior baselines and run regression tests to determine if any breakage or change of behavior occurs. Includes JSON and XML Diff capability. Test encryption and decryption of JSON, XML, REST, and SOAP message patterns. Simulate load from multiple virtual clients to measure and validate the performance criteria of the target APIs. Dynamic security and identity provide real world simulated inputs. Built-in support for AWSv4 signatures to authenticate to and test Amazon AWS APIs.Starting Price: $80/month -
35
Open Container Initiative (OCI)
Open Container Initiative (OCI)
The Open Container Initiative is an open governance structure for the express purpose of creating open industry standards around container formats and runtimes. Established in June 2015 by Docker and other leaders in the container industry, the OCI currently contains two specifications, the runtime specification (runtime-spec) and the image specification (image-spec). The runtime specification outlines how to run a “filesystem bundle” that is unpacked on disk. At a high-level an OCI implementation would download an OCI Image then unpack that image into an OCI Runtime filesystem bundle. At this point the OCI Runtime Bundle would be run by an OCI Runtime. The Open Container Initiative (OCI) is a lightweight, open governance structure (project), formed under the auspices of the Linux Foundation, for the express purpose of creating open industry standards around container formats and runtime. The OCI was launched on June 22nd 2015 by Docker, CoreOS and other leaders. -
36
Qarbon LATTICE
Qarbon Technologies
Qarbon LATTICE, a SaaS-based orchestration platform can provide a single, OpenAPI interface between data centers and customers. Qarbon will transform the status quo for digital infrastructure customers. LATTICE is a SaaS-based platform that onboards the entire tech stack of each data center, providing users with a single, open, and secure interface between the operator and their business systems. LATTICE provides customers with an OpenAPI-compliant interface between data centers and their customers. OpenAPI is the leading industry specification for a machine-readable interface definition language for both humans and machines. LATTICE enables seamless, standardized reporting of ESG data, including scope I and II CO2 emissions. Customers will be able to access real-time, standardized power, water, and CO2 data, for data center-related ESG reporting through a button-click. Qarbon is a platform that securely transfers data between workflow management and data center systems. -
37
Bijira
WSO2
WSO2 Bijira is an AI-native, cloud-native SaaS API management platform built to manage the full lifecycle of APIs, including design, security, governance, deployment, and monitoring, across internal, external, egress, and AI-driven APIs in hybrid and multi-cloud environments. It provides a unified control plane for consistent API policy, security, and analytics while supporting visual API proxy mapping, drag-and-drop policy management, and a customizable developer portal to accelerate API adoption and reuse. Bijira leverages AI tools to help generate OpenAPI specs, test APIs using natural language prompts, validate compliance with governance rules, and feed insights back into the API development process. It integrates robust security mechanisms, including OAuth2, OIDC, fine-grained access control, and firewall protections, and enforces governance-as-code with AI-assisted policy validation. -
38
BuildShip
BuildShip
BuildShip is a lowcode visual backend builder that lets you ship APIs, scheduled jobs, AI workflows, cloud jobs instantly. Connect with any database, tools and AI models to create complete backend logic flows. Use prebuilt nodes or use AI to create custom logic nodes just for you. By combining the ease of nocode with power of low-code extensibility - BuildShip gives you a scalable way to build your backend fast. Supports powerful use-cases like: 💸 Collect payment and trigger Stripe, RevenueCat, Lemon Squeezy for subscription workflows 🪄 Trigger AI workflows and build AI apps' backend 🔌 Creating APIs for processing your data and CRUD ops on database 📝 Send form submission data to third party tools 🤖 Add AI Assistant Chatbot with OpenAI, Azure, Claude, Groq or any model 💌 Email users, generate leads, enrich data The possibilities are endless with BuildShip ✨Starting Price: $25 per month -
39
Kusk
Kubeshop
Kusk is an Open Source API Gateway that allows you to develop, monitor and deploy your APIs in a matter of minutes. Kusk powers-up your API workflows with mocked responses and validated requests out-of-the-box and automates the deployment of the API Gateway with your favorite GitOps workflows. Have a single source of truth for your API by using the OpenAPI Standard, meaning no additional configuration files are needed!Starting Price: Free -
40
Kiota
Microsoft
Kiota is a client, plugin, and manifest generator for HTTP REST APIs described by OpenAPI. Available as a command-line tool and a Visual Studio Code (VS Code) extension, Kiota enables developers to search for API descriptions, filter and select specific endpoints, and generate models and a chained method API surface in various programming languages. This approach eliminates the need to depend on different API clients for each API and allows for precise generation of the required API surface area. Additionally, Kiota facilitates participation in the Microsoft Copilot ecosystem by enabling the generation of API plugins. The VS Code extension enhances the Kiota experience with a rich user interface, supporting features such as searching for API descriptions, filtering endpoints, and generating API clients. Users can select desired endpoints and generate clients, plugins, or other outputs, with completion notifications and easy access to generated outputs within the workspace.Starting Price: Free -
41
EthicalCheck
EthicalCheck
Submit API test requests via the UI form or invoke EthicalCheck API using cURL/Postman. Request input requires a public-facing OpenAPI Spec URL, an API authentication token valid for at least 10 mins, an active license key, and an email. EthicalCheck engine automatically creates and runs custom security tests for your APIs covering OWASP API Top 10 list Automatically removes false positives from the results, creates a custom developer-friendly report, and emails it to you. According to Gartner, APIs are the most-frequent attack vector. Hackers/bots have exploited API vulnerabilities resulting in major breaches across thousands of organizations. Only see real vulnerabilities; false positives are automatically separated. Generate enterprise-grade penetration test reports. Confidently share it with developers, customers, partners, and compliance teams. Using EthicalCheck is similar to running a private bug-bounty program.Starting Price: $99 one-time payment -
42
Apache APISIX
Apache APISIX
Apache APISIX provides rich traffic management features like Load Balancing, Dynamic Upstream, Canary Release, Circuit Breaking, Authentication, Observability, etc. Apache APISIX provides open source API Gateway to help you manage microservices, delivering the ultimate performance, security, and scalable platform for all your APIs and microservices. Apache APISIX is the first open-source API Gateway that includes a built-in low-code Dashboard, which offers a powerful and flexible UI for developers to use. The Apache APISIX Dashboard is designed to make it as easy as possible for users to operate Apache APISIX through a frontend interface. It’s open-source and ever evolving, feel free to contribute. The Apache APISIX dashboard is flexible to User demand, providing option to create custom modules through code matching your requirements, alongside the existing no-code toolchain. -
43
Stainless
Stainless
Developers expect your API to come with a typesafe client library in their language. With Stainless, you can deliver idiomatic SDKs while you stay focused on building the API. Great SDKs for your API drive faster integration, broader feature adoption, quicker upgrades, and trust in your engineering quality. At Stainless, we work hard to make each SDK feel as though it were hand-written by an expert in the language who had the time to get it right. All our libraries include rich types (for autocomplete and docs on hover), auto-pagination, auto-retry with backoff, seamless auth, and much more. All Stainless needs to get started is your OpenAPI spec. It doesn’t have to be perfect. We’ll create a starter Stainless config file that standardizes naming and defines core functionality like pagination and authentication. Receive shippable SDKs in the languages your developers demand. You can customize the Stainless configuration for more bespoke SDKs that best represent you.Starting Price: $250 per month -
44
Swagger Codegen
SmartBear
Swagger Codegen can simplify your build process by generating server stubs and client SDKs for any API, defined with the OpenAPI (formerly known as Swagger) specification, so your team can focus better on your API’s implementation and adoption. Moving from design to development has never been easier with Swagger Codegen in SwaggerHub. API Definition files can be used to create stubs in popular languages, like Java, Scala, and Ruby, with just a few clicks.Starting Price: Free -
45
Devii
Devii
Devii is an advanced API management platform that instantly creates GraphQL APIs for SQL databases, simplifying the backend process for developers. This platform automatically generates schema-based APIs with CRUD functionality, enabling easy data fetching and manipulation. Devii’s built-in security features use policy-based access control (PBAC) to safeguard data without complex configurations, ensuring that only authorized users access specific resources. The platform supports integration across various SQL databases, including MySQL, PostgreSQL, Oracle, and others, allowing developers to manage all database interactions through a single GraphQL interface. With its extensive process rules, Devii adds robust functionality like email dispatch, PDF generation, image processing, and payment gateway actions, making it a comprehensive solution for application development. Devii also offers analytics for monitoring API performance, tracking usage, and identifying slow queries.Starting Price: $49 per month -
46
Backengine
Backengine
Describe example API requests and responses. Define API endpoint logic in natural language. Test your API endpoints and fine-tune your prompt, response structure, and request structure. Deploy API endpoints with a single click and integrate into your applications. Build and deploy sophisticated application logic without writing any code in less than a minute. No individual LLM accounts required. Just sign up to Backengine and start building. Your endpoints run on our super fast backend architecture, available immediately. All endpoints are secure and protected so only you and your applications can use them. Easily manage your team members so everyone can work on your Backengine endpoints. Augment your Backengine endpoints with persistent data. A complete backend replacement. Use external APIs into your endpoints without doing any integration work yourself.Starting Price: $20 per month -
47
NSwag
Rico Suter
NSwag is a comprehensive Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, ASP.NET Core, and TypeScript, written in C#. It enables developers to generate OpenAPI specifications from existing API controllers and create client code from these specifications. NSwag combines functionalities similar to Swashbuckle (for OpenAPI/Swagger generation) and AutoRest (for client generation) into a single toolchain, eliminating the need for both. Key features include the ability to generate Swagger 2.0 and OpenAPI 3.0 specifications from C# ASP.NET (Core) controllers, serve these specifications via ASP.NET (Core) middleware with integrated Swagger UI or ReDoc, and generate C# or TypeScript clients/proxies from the specifications. NSwag offers multiple usage methods, including a user-friendly Windows GUI (NSwagStudio), command-line interfaces compatible with Windows, Mac, and Linux, and integration into C# code via NuGet packages.Starting Price: Free -
48
Fern
Fern
Stripe-level SDKs and Docs for your API. Offer type-safe SDKs in the most popular languages. Let Fern do the heavy lifting of generating and publishing client libraries so your team can focus on building the API. Import your API definition, whether it's in OpenAPI or Fern's simpler format. Select which code generators you'd like to use: TypeScript, Python, Java, Go, Ruby, C#, Swift. Fern semantically versions and publishes packages to each registry (e.g. npm, pypi, maven). Beautiful API documentation that reflects your brand.Starting Price: $250 per month -
49
Konfig
Konfig
Konfig is a developer tool that automates the generation of SDKs, documentation, demos, and tutorials for REST APIs, facilitating seamless onboarding for external developers. By importing an OpenAPI Specification or Postman Collection, Konfig automatically produces SDKs in popular programming languages, including TypeScript, Python, Java, C#, PHP, Ruby, Go, Swift, and Dart. The platform ensures high-quality SDKs by identifying and rectifying errors in the OpenAPI Specification through its linter and writing test cases to prevent API updates from breaking existing SDKs. Konfig also generates branded, user-friendly documentation that auto-updates with any changes to the API specification, maintaining consistency between documentation and SDKs. Additionally, it allows for the creation of engaging demos and tutorials using familiar Markdown, enabling users to run code in-browser for hands-on learning. -
50
Directus
Monospace Inc
Directus is an Open Data Platform for managing the content of any SQL database. It provides a powerful API layer for developers and an intuitive App for non-technical users. Written entirely in JavaScript (primarily Node.js and Vue.js), Directus is completely open-source, modular, and extensible, allowing it to be fully tailored to your exact project needs. With Directus Cloud, we've taken our open-source spirit to the cloud by offering Directus Community Cloud, a completely free tier - without quotas or limitations. It's ideal for hobby projects and demos, and when you're ready for production, Standard Cloud has the power and infrastructure options you need. Our pricing is usage-based, which means you only pay for what you use. Use Directus on your next headless cms, internal tool, or SaaS project, or use our Insights for better data management and analytics. With Directus, you're only limited by your imagination.Starting Price: Free
