head to head · open source
headroom vs openless
headroom has 73,130 GitHub stars, 5,624 forks, 643 open issues and last shipped yesterday. openless has 3,594 stars, 331 forks, 36 open issues and last shipped 2 days ago. headroom leads on adoption by 1,935% (73,130 vs 3,594 stars). headroom is written in Python under Apache-2.0; openless is written in Rust under AGPL-3.0. headroom has attracted 8% as many forks as stars, openless 9%. headroom was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (llm), 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 | openless | |
|---|---|---|
| GitHub stars | ★ 73K | ★ 3.6K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Python | Rust |
| Last push | 2026-09-19 | 2026-09-18 |
| Forks | ⑂ 5.6K | ⑂ 331 |
| 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 openless if
- You want the openless feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Rust
- You evaluated both and openless 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 openless
OpenLess is a cross platform voice input application for macOS and Windows, written in Rust under the AGPL 3.0 licence, that lets anyone hold a global hotkey, speak, and get AI polished text inserted directly at the cursor in any application — aimed at writers, developers, and knowledge workers who dictate into ChatGPT, Claude, Cursor, Notion, email drafts, and chat boxes.
read the full openless overview →
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Frequently asked questions
Is headroom or openless more popular?
headroom has 73,130 GitHub stars and openless has 3,594. headroom has the larger community by that measure.
Are headroom and openless free?
Both are open source. headroom is licensed under Apache-2.0 and openless under AGPL-3.0. Neither carries a licence fee.
What is the difference between headroom and openless?
headroom is written in Python and openless in Rust. 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 openless?
Choose headroom if you want the larger community (73,130 stars) or its Apache-2.0 licence terms. Choose openless if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.