Source: https://seerepo.com/compare/headroomlabs-ai/headroom/vs/xai-org/x-algorithm
Markdown source: https://seerepo.com/compare/headroomlabs-ai/headroom/vs/xai-org/x-algorithm.md
Description: headroom and x-algorithm share 9 technologies: FastAPI, axum, Redis, Tokio, tower, OpenTelemetry, tracing, prometheus, and tracing-subscriber. headroom is written in Python and x-algorithm in Rust.

# headroom vs x-algorithm

headroom and x-algorithm share 9 technologies: FastAPI, axum, Redis, Tokio, tower, OpenTelemetry, tracing, prometheus, and tracing-subscriber. headroom is written in Python and x-algorithm in Rust.

- [headroomlabs-ai/headroom](https://seerepo.com/r/headroomlabs-ai/headroom): Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. Library, proxy, MCP server.
- [xai-org/x-algorithm](https://seerepo.com/r/xai-org/x-algorithm): Algorithm powering the For You feed on X

## What they share and what sets them apart

- In common: FastAPI, axum, Redis, Tokio, tower, OpenTelemetry, tracing, prometheus, tracing-subscriber
- Only in headroom: rusqlite, SQLite, lru, Rich, gcp_auth, autogen-agentchat, litellm, hf-hub, ort, tiktoken, tokenizers, tiktoken-rs, Pydantic, @opencode-ai/plugin, @ai-sdk/provider, ai
- Only in x-algorithm: confluent-kafka, rdkafka, pyarrow, arrow, object_store, moka, heed, Kafka, Google, Google Cloud Storage, google-cloud-auth, jax, optax, orbax-checkpoint, parquet, opentelemetry-api, log, env_logger, opentelemetry-exporter-otlp-proto-grpc, prometheus-client, psutil

## Side by side

| | headroom | x-algorithm |
|---|---|---|
| Size | 789,601 lines written, 773 code files | 419,187 lines written, 929 code files |
| Who writes it | 28.1% of its commits signed by AI. With Claude Code, GitHub Copilot, Codex, Cursor, Devin, and Mistral Vibe | 1.5% of its commits signed by AI. With Claude Code |
| Activity | Last push November 4, 2026, 3,201 commits, 78,851 stars | Last push November 7, 2026, 65 commits, 34,122 stars |
| Tests | 1,220 test files. 68.2% of its code files have a test that imports them | 19 test files. 1.1% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, headroom or x-algorithm?

headroom, with 789,601 lines written; x-algorithm has 419,187.

The proof: [headroomlabs-ai/headroom's code at commit 31dcaf4](https://github.com/headroomlabs-ai/headroom/tree/31dcaf41f7fafaebec0838a05ff328da456faef0)

### Which has more GitHub stars, headroom or x-algorithm?

headroom, with 78,851 stars; x-algorithm has 34,122.

The proof: [headroomlabs-ai/headroom on GitHub](https://github.com/headroomlabs-ai/headroom)

### Which has more tests, headroom or x-algorithm?

headroom, with 1,220 test files; x-algorithm has 19.

The proof: [headroomlabs-ai/headroom's code at commit 31dcaf4](https://github.com/headroomlabs-ai/headroom/tree/31dcaf41f7fafaebec0838a05ff328da456faef0)

### Which was updated more recently, headroom or x-algorithm?

x-algorithm: its last push was on November 7, 2026, and headroom's on November 4, 2026.

The proof: [xai-org/x-algorithm's commits on GitHub](https://github.com/xai-org/x-algorithm/commits)

### Which has more commits signed by AI, headroom or x-algorithm?

headroom: an AI signed 28.1% of its commits, with Claude Code, GitHub Copilot, Codex, Cursor, Devin, and Mistral Vibe; in x-algorithm, 1.5%.

The proof: [the commits each tool signed in headroomlabs-ai/headroom](https://seerepo.com/r/headroomlabs-ai/headroom/ai)

## Sources

- headroomlabs-ai/headroom: Read on November 4, 2026, at commit 31dcaf4 (https://github.com/headroomlabs-ai/headroom/tree/31dcaf41f7fafaebec0838a05ff328da456faef0)
- xai-org/x-algorithm: Read on November 7, 2026, at commit 3b6919f (https://github.com/xai-org/x-algorithm/tree/3b6919f87532e57063bb3f1e85c2f509323b513e)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.