Source: https://seerepo.com/compare/nautechsystems/nautilus_trader/vs/xai-org/x-algorithm
Markdown source: https://seerepo.com/compare/nautechsystems/nautilus_trader/vs/xai-org/x-algorithm.md
Description: nautilus_trader and x-algorithm share 8 technologies: arrow, object_store, Redis, Tokio, parquet, log, tracing, and tracing-subscriber. Both are written in Rust.

# nautilus_trader vs x-algorithm

nautilus_trader and x-algorithm share 8 technologies: arrow, object_store, Redis, Tokio, parquet, log, tracing, and tracing-subscriber. Both are written in Rust.

- [nautechsystems/nautilus_trader](https://seerepo.com/r/nautechsystems/nautilus_trader): Production-grade Rust-native trading engine with deterministic event-driven architecture
- [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: arrow, object_store, Redis, Tokio, parquet, log, tracing, tracing-subscriber
- Only in nautilus_trader: sqlx, datafusion, redb, tabled, ed25519-dalek, csv, bollard
- Only in x-algorithm: FastAPI, axum, confluent-kafka, rdkafka, pyarrow, moka, heed, Kafka, Google, Google Cloud Storage, tower, google-cloud-auth, jax, optax, orbax-checkpoint, opentelemetry-api, prometheus, env_logger, OpenTelemetry, opentelemetry-exporter-otlp-proto-grpc, prometheus-client, psutil

## Side by side

| | nautilus_trader | x-algorithm |
|---|---|---|
| Size | 2,504,588 lines written, 2,347 code files | 419,187 lines written, 929 code files |
| Who writes it | 0% of its commits signed by AI. With Claude Code | 1.5% of its commits signed by AI. With Claude Code |
| Activity | Last push November 7, 2026, 21,899 commits, 31,337 stars | Last push November 7, 2026, 65 commits, 34,122 stars |
| Tests | 580 test files. 18% 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, nautilus_trader or x-algorithm?

nautilus_trader, with 2,504,588 lines written; x-algorithm has 419,187.

The proof: [nautechsystems/nautilus_trader's code at commit fa4c7a8](https://github.com/nautechsystems/nautilus_trader/tree/fa4c7a8cf16d8b4061516fe3c1f1fc9fef6a6e8f)

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

x-algorithm, with 34,122 stars; nautilus_trader has 31,337.

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

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

nautilus_trader, with 580 test files; x-algorithm has 19.

The proof: [nautechsystems/nautilus_trader's code at commit fa4c7a8](https://github.com/nautechsystems/nautilus_trader/tree/fa4c7a8cf16d8b4061516fe3c1f1fc9fef6a6e8f)

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

Both got their last push on November 7, 2026.

The proof: [nautechsystems/nautilus_trader's commits on GitHub](https://github.com/nautechsystems/nautilus_trader/commits)

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

x-algorithm: an AI signed 1.5% of its commits, with Claude Code.

## Sources

- nautechsystems/nautilus_trader: Read on November 7, 2026, at commit fa4c7a8 (https://github.com/nautechsystems/nautilus_trader/tree/fa4c7a8cf16d8b4061516fe3c1f1fc9fef6a6e8f)
- 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.