head to head · open source
headroom vs ChainForge
headroom has 73,130 GitHub stars, 5,624 forks, 643 open issues and last shipped yesterday. ChainForge has 3,030 stars, 257 forks, 71 open issues and last shipped yesterday. headroom leads on adoption by 2,314% (73,130 vs 3,030 stars). headroom is written in Python under Apache-2.0; ChainForge is written in TypeScript under MIT. headroom has attracted 8% as many forks as stars, ChainForge 8%. headroom was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| headroom | ChainForge | |
|---|---|---|
| GitHub stars | ★ 73K | ★ 3.0K |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 5.6K | ⑂ 257 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick headroom if
- You weight community size — 73K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick ChainForge if
- You want the ChainForge feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and ChainForge fits your workflow better
About headroom
Headroom is an Apache 2.0 Python library, local proxy, agent wrapper and MCP server that compresses tool outputs, logs, files, RAG chunks and conversation history before they reach an LLM, and it is built for developers running AI coding agents or LLM applications who want to cut token usage without changing the answers they get.
read the full headroom overview →
About ChainForge
ChainForge is an open source, MIT licensed visual programming environment in which prompt engineers, evaluation teams, and LLMOps practitioners build data flow graphs to battle test prompts and compare responses across multiple large language models at once.
read the full ChainForge overview →
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Frequently asked questions
Is headroom or ChainForge more popular?
headroom has 73,130 GitHub stars and ChainForge has 3,030. headroom has the larger community by that measure.
Are headroom and ChainForge free?
Both are open source. headroom is licensed under Apache-2.0 and ChainForge under MIT. Neither carries a licence fee.
What is the difference between headroom and ChainForge?
headroom is written in Python and ChainForge in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, headroom or ChainForge?
Choose headroom if you want the larger community (73,130 stars) or its Apache-2.0 licence terms. Choose ChainForge if its feature set, stack or MIT licence fits better. Both are self-hostable.