What is the best free alternative to Eclipse Theia IDE?
Cursor is the closest free alternative to Eclipse Theia IDE: same AI IDEs & Editors sub-category, and it is free tier + paid. AI-first VS Code fork with agent mode
Best free Eclipse Theia IDE alternatives
Looking for a free alternative to Eclipse Theia IDE? Here are 9 ai ides & editors worth trying — 8 with a free tier. Eclipse Theia IDE itself is free.
| Tool | Eclipse Theia IDE (you searched) | Void | Cursor | Google Antigravity |
|---|---|---|---|---|
| Pricing | free | freeLeaving soon | freemium | freemium |
| Best for | Open-source, vendor-neutral IDE with AI agents built on Theia AI | Fully open-source VS Code fork alternative to Cursor/Windsurf | AI-first VS Code fork with agent mode | Google's agent-first IDE |
| Visit | Open ↗ | Open ↗ | Open ↗ | Open ↗ |
Eclipse Theia IDE alternatives — straight answers
Are there free Eclipse Theia IDE alternatives?
Yes — 8 of the 9 alternatives listed here are free or freemium: Cursor, Google Antigravity, Windsurf, Zed, Kiro. None of them are paid-only.
Is Eclipse Theia IDE free?
Eclipse Theia IDE is free. There is no paid plan attached to it in the catalog.
How were these Eclipse Theia IDE alternatives chosen?
They are the other tools in AI IDEs & Editors, then the rest of Code & Development, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.
All Eclipse Theia IDE alternatives
Browse AI IDEs & Editors →✦ WhyA Eclipse Theia IDE alternative — Fully open-source VS Code fork alternative to Cursor/Windsurf.
- Fully open-source VS Code fork alternative to Cursor/Windsurf
- Bring-your-own-key to any model, no proprietary backend routing
- Agent Mode, Gather Mode and inline chat built in
Cursor
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — AI-first VS Code fork with agent mode.
- AI-first VS Code fork with agent mode
- Multi-file edits and terminal commands
- Codebase-wide context and rules
- Free tier with limited requests
Google Antigravity
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — Google's agent-first IDE.
- Google's agent-first IDE
- Powered by Gemini 3 models
- Autonomous multi-step coding
- Free access tier
Windsurf
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — Agentic IDE with the Cascade flow.
- Agentic IDE with the Cascade flow
- Now part of Cognition (Devin)
- Deep whole-repo awareness
- Free tier available
Zed
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — Blazing-fast, Rust-built editor.
- Blazing-fast, Rust-built editor
- Agentic editing and prediction
- Real-time collaboration
- Free and open-source core
Kiro
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — AWS's spec-driven agentic IDE.
- AWS's spec-driven agentic IDE
- Turns requirements into plans and code
- Hooks and steering files
- Free tier
Trae
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — ByteDance's free AI IDE.
- ByteDance's free AI IDE
- SOLO agent builder mode
- Access to frontier models
- Generous free usage
JetBrains Junie
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — Autonomous coding agent embedded in JetBrains IDEs (IntelliJ, PyCharm, WebStorm).
- Autonomous coding agent embedded in JetBrains IDEs (IntelliJ, PyCharm, WebStorm)
- Plans and executes multi-step coding tasks in-IDE
- Deep integration with JetBrains code intelligence/refactoring
Qoder
AI IDEs & Editors
✦ WhyA Eclipse Theia IDE alternative — Multi-agent collaboration IDE from Alibaba.
- Multi-agent collaboration IDE from Alibaba
- Handles codebases up to 100,000 files with long-running agents (up to 26h)
- Auto-generates repo wikis (400,000+ generated)