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Jan vs Roo Code

A side-by-side comparison of two open-source tools to help you choose the right one.

Feature
SummaryAn offline AI assistant that runs on your device.Agentic AI coding inside VS Code.
GitHub stars30K16.5K
LicenseAGPL 3.0Apache 2.0
LanguageTypeScriptTypeScript
PricingFree & Open SourceFree & Open Source
Self-hostable
ReplacesChatGPT, GitHub CopilotClaude Code, GitHub Copilot
Rating4.6 / 54.6 / 5

Jan features

  • Runs open models entirely offline on CPU or GPU
  • Cross-platform desktop app (macOS, Windows, Linux)
  • Optional connection to remote model APIs
  • Local API server compatible with OpenAI clients
  • No telemetry by default

Roo Code features

  • Multi-file, project-wide editing
  • Custom modes for code, architecture, and debugging
  • Use any model provider
  • Agentic task automation
  • Open source with an active community

Janpros & cons

Pros

  • Genuinely private and offline-first
  • Simple, friendly desktop UX
  • Doubles as a local OpenAI-compatible server

Cons

  • Local model quality depends on your hardware
  • Smaller plugin ecosystem than web apps

Roo Codepros & cons

Pros

  • Flexible modes for different tasks
  • Model-agnostic and open
  • Strong VS Code integration

Cons

  • Lots of options to configure
  • Agentic runs benefit from review

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