OpenSpec

OpenSpec

Fission AI
OpenCode

OpenCode

Anomaly Innovations
+
+

Related Products

  • JetBrains Junie
    12 Ratings
    Visit Website
  • Retool
    593 Ratings
    Visit Website
  • Google AI Studio
    30 Ratings
    Visit Website
  • BAND
    3 Ratings
    Visit Website
  • Innoslate
    93 Ratings
    Visit Website
  • Planview ProjectAdvantage
    121 Ratings
    Visit Website
  • Gemini Enterprise Agent Platform
    999 Ratings
    Visit Website
  • StackAI
    53 Ratings
    Visit Website
  • Bright Data
    1,418 Ratings
    Visit Website
  • Parasoft
    148 Ratings
    Visit Website

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
Open source
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

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.5 / 5
support 4.5 / 5

Pros & Cons from Real Users

Pros

  • OpenCode feels like a strong fit for developers who want an AI coding agent without getting locked into one model or one editor. I like that it works in the terminal, desktop, and IDE, so it can fit into different workflows instead of forcing one setup. The model flexibility is a big win. Being able to use 75+ providers, local models, GitHub Copilot, or ChatGPT Plus/Pro makes OpenCode feel more open and customizable than a lot of coding assistants. I also like the LSP support and multi-session workflow. For real coding work, it helps when the agent understands the project better and can run multiple threads of work in parallel.
  • Easy to install Easy to use Free models available with nearly no limits New models commonly get added for free

Cons

  • OpenCode is still something I would supervise closely. Any coding agent that can modify files, reason through projects, and run workflows needs clear review, tests, and good developer judgment.
  • CLI only

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
GSD Pi

GSD Pi

Open GSD
Kiro

Kiro

Amazon Web Services
Zenflow

Zenflow

Zencoder
Claude Code

Claude Code

Anthropic
Intent

Intent

Augment Code

Categories

Categories

Integrations

Claude Code
Cursor
Devin Desktop
GitHub Copilot
AionUi
Bevel
Crush
GPT-4.1
GPT-5.4
GPT-5.4 Pro
GPT-5.6 Sol Ultrafast
GPT-5.6 Terra
Gemini 3.1 Flash-Lite
Gemini 3.5 Pro
Laguna XS.2
OpenAI Codex
OpenCode
Puter.js
condense.chat
omp

Integrations

Claude Code
Cursor
Devin Desktop
GitHub Copilot
AionUi
Bevel
Crush
GPT-4.1
GPT-5.4
GPT-5.4 Pro
GPT-5.6 Sol Ultrafast
GPT-5.6 Terra
Gemini 3.1 Flash-Lite
Gemini 3.5 Pro
Laguna XS.2
OpenAI Codex
OpenCode
Puter.js
condense.chat
omp
Claim OpenSpec and update features and information
Claim OpenSpec and update features and information
Claim OpenCode and update features and information
Claim OpenCode and update features and information