head to head · open source
headroom vs Bifrost
headroom has 73,130 GitHub stars, 5,624 forks, 643 open issues and last shipped yesterday. Bifrost has 8,178 stars, 1,244 forks, 1,014 open issues and last shipped yesterday. headroom leads on adoption by 794% (73,130 vs 8,178 stars). headroom is written in Python under Apache-2.0; Bifrost is written in Go under Apache-2.0. headroom has attracted 8% as many forks as stars, Bifrost 15%. Bifrost 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 | Bifrost | |
|---|---|---|
| GitHub stars | ★ 73K | ★ 8.2K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 5.6K | ⑂ 1.2K |
| 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 Bifrost if
- You want the Bifrost feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and Bifrost 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 Bifrost
Bifrost is an open source, Go based AI gateway that puts 23+ model providers — OpenAI, Anthropic, AWS Bedrock, Google Vertex, Azure, Cerebras, Cohere, Mistral, Ollama, Groq and more — behind one OpenAI compatible API, built for teams running AI features in production that need failover, load balancing and caching without rewriting client code.
read the full Bifrost overview →
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Frequently asked questions
Is headroom or Bifrost more popular?
headroom has 73,130 GitHub stars and Bifrost has 8,178. headroom has the larger community by that measure.
Are headroom and Bifrost free?
Both are open source. headroom is licensed under Apache-2.0 and Bifrost under Apache-2.0. Neither carries a licence fee.
What is the difference between headroom and Bifrost?
headroom is written in Python and Bifrost in Go. 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 Bifrost?
Choose headroom if you want the larger community (73,130 stars) or its Apache-2.0 licence terms. Choose Bifrost if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.