# Eclipse Theia IDE

Open-source, vendor-neutral IDE with AI agents built on Theia AI. Eclipse Theia IDE is free, with no paid plan attached, at theia-ide.org.

## Facts

- **Pricing tier:** Free
- **Works on:** Windows, Linux, macOS, Self-hosted, Web
- **Works in browser:** Yes

## Capabilities

- Open-source, vendor-neutral IDE with AI agents built on Theia AI
- Bring your own API key or local model; no telemetry on code or prompts
- Customisable agents and prompts, governed by the Eclipse Foundation

## FAQ

### What is Eclipse Theia IDE?

Eclipse Theia IDE is listed under AI IDEs & Editors, in the Code & Development category on Flocci AI Tools. Open-source, vendor-neutral IDE with AI agents built on Theia AI. It is free, with no paid plan attached, and it lives at theia-ide.org.

### Is Eclipse Theia IDE free?

Eclipse Theia IDE is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use Eclipse Theia IDE in a browser, or is there an app?

Eclipse Theia IDE works in a normal browser tab with no install. It is available on Windows, Linux, Mac, self-hosting and the web.

### What can Eclipse Theia IDE do?

Eclipse Theia IDE does 3 things the catalog singles out: Open-source, vendor-neutral ide with ai agents built on theia ai; bring your own api key or local model; no telemetry on code or prompts; customisable agents and prompts, governed by the eclipse foundation.

### What is the best free alternative to Eclipse Theia IDE?

Kiro is the closest free alternative: it sits in the same AI IDEs & Editors sub-category and is free tier + paid plans. CodeBuddy (Tencent), Cursor and Google Antigravity also start free. The full list is on the alternatives page.

## Related

- [Eclipse Theia IDE alternatives](https://aitools.flocci.in/alternatives/eclipse-theia-ide)
- [AI IDEs & Editors](https://aitools.flocci.in/category/code-development/ai-ides-editors)
- [Best free AI code editors and IDEs](https://aitools.flocci.in/best/best-ai-ides-editors)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/eclipse-theia-ide

Facts last verified: October 2026