## Startup showcase (1-1 of 1)

### Jan
An open-source ChatGPT alternative that runs offline

45,118 GitHub stars (janhq/jan, Apache-2.0, 2026-10-27)

Desktop app · AI · by Jan · launched 2023-08-17. https://jan.ai

- Frontend: Tauri, React, Vite
- Backend: Rust
- AI: OpenAI API (`openai`, priced), Anthropic (Claude API) (`anthropic`, priced), Google Gemini API (`google-gemini`, priced)
- Analytics: PostHog (`posthog`, priced)

Most used: Anthropic (Claude API) (1), Google Gemini API (1), OpenAI API (1), PostHog (1), React (1), Rust (1), Tauri (1), Vite (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.