head to head · open source
headroom vs Bifrost
headroom has 78,773 GitHub stars, 6,155 forks, 643 open issues and last shipped yesterday. Bifrost has 9,332 stars, 1,520 forks, 1,014 open issues and last shipped yesterday. headroom leads on adoption by 744% (78,773 vs 9,332 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 16%. headroom was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (claude-code), 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 | ★ 79K | ★ 9.3K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | Go |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 6.2K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick headroom if
- You weight community size — 79K 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
Quickstart · Install · Proof · Agents · Docs · Discord · llms.txt AI agents / LLMs: read /llms.txt here, or fetch the live index · full docs blob . Headroom compresses everything your AI agent reads — tool outputs, logs, RAG chunks, files, and conversation history — before it reaches the LLM. Same answers, fraction of the tokens. Compression runs on your machine; no prompt or file content is sent anywhere to be compressed. 10,144 → 1,260 tokens. The same FATAL found. What it does Library — compress(messages) in Python or TypeScript, inline in any app. Proxy — headroom proxy port 8787 , zero code changes, any…
read the full headroom overview →
About Bifrost
Bifrost AI Gateway The fastest way to build AI applications that never go down Bifrost is a high performance AI gateway that unifies access to 23+ providers (OpenAI, Anthropic, AWS Bedrock, Google Vertex, and more) through a single OpenAI compatible API. Deploy in seconds with zero configuration and get automatic failover, load balancing, semantic caching, and enterprise grade features. Quick Start Go from zero to production ready AI gateway in under a minute. Step 1: Start Bifrost Gateway Step 2: Configure via Web UI Step 3: Make your first API call That's it! Your AI gateway is running with a web interface for…
read the full Bifrost overview →
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Frequently asked questions
Is headroom or Bifrost more popular?
headroom has 78,773 GitHub stars and Bifrost has 9,332. 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 (78,773 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.