OpenSpec

OpenSpec

Fission AI
OpenCode

OpenCode

Anomaly Innovations
+
+

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About

OpenSpec is an open-source spec-driven development framework designed to bring structure and clarity to AI-assisted coding workflows. It introduces a lightweight specification layer that helps teams define requirements before writing code. The platform organizes each change into structured artifacts such as proposals, specifications, designs, and task lists. It integrates with over 20 AI coding tools, allowing developers to use their preferred assistants while maintaining consistency. OpenSpec emphasizes an iterative and flexible approach rather than rigid development phases. Its command-based workflow enables users to propose, implement, and archive features efficiently. Overall, OpenSpec helps developers align with AI systems, reduce ambiguity, and produce more predictable and reliable outcomes.

About

OpenCode is the AI coding agent purpose-built for the terminal. It delivers a responsive, themeable terminal UI that feels native while streamlining your workflow. With LSP auto-loading, it ensures the right language servers are always available for accurate, context-aware coding support. Developers can spin up multiple AI agents in parallel sessions on the same project, maximizing productivity. Shareable links make it easy to reference, debug, or collaborate across sessions. Supporting Claude Pro and 75+ LLM providers via Models.dev, OpenCode gives you full freedom to choose your coding companion.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers, product teams, and organizations using AI coding assistants who want a structured, spec-driven approach to improve clarity, collaboration, and development outcomes

Audience

OpenCode is built for developers who want an AI coding agent that’s fast, collaborative, and native to the terminal

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version
Free Trial

Pricing

Free
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.0 / 5
support 4.0 / 5

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Fission AI
openspec.dev/

Company Information

Anomaly Innovations
Founded: 2008
United States
opencode.ai/

Alternatives

Claude Code

Claude Code

Anthropic

Alternatives

Amp

Amp

Amp Code
Kiro

Kiro

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OpenClaw

OpenClaw

Molty
OpenCode

OpenCode

Anomaly Innovations
Zenflow

Zenflow

Zencoder
Claude Code

Claude Code

Anthropic
Intent

Intent

Augment Code

Categories

Categories

Integrations

Claude Code
Cursor
GitHub Copilot
Windsurf Editor
Claude Opus 4
Claude Sonnet 4.5
GPT-4.1
GPT-5.1 Instant
GPT-5.1 Thinking
GPT-5.2 Thinking
GPT-5.4 mini
Gemini 3 Flash
Gemini 3.1 Pro
Google Antigravity
Grok Code Fast 1
Kilo Code
OpenAI Codex
Qwen Code
TypeUI
Vicoa

Integrations

Claude Code
Cursor
GitHub Copilot
Windsurf Editor
Claude Opus 4
Claude Sonnet 4.5
GPT-4.1
GPT-5.1 Instant
GPT-5.1 Thinking
GPT-5.2 Thinking
GPT-5.4 mini
Gemini 3 Flash
Gemini 3.1 Pro
Google Antigravity
Grok Code Fast 1
Kilo Code
OpenAI Codex
Qwen Code
TypeUI
Vicoa
Claim OpenSpec and update features and information
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