Source: https://seerepo.com/compare/atuinsh/atuin/vs/unionlabs/union
Markdown source: https://seerepo.com/compare/atuinsh/atuin/vs/unionlabs/union.md
Description: atuin and union share 15 technologies: axum, sqlx-postgres, sqlx, SQLite, Postgres, Tokio, tower, Ratatui, crossterm, schemars, tracing, tracing-subscriber, OpenTelemetry, opentelemetry-otlp, and tracing-opentelemetry. Both are written in Rust.

# atuin vs union

atuin and union share 15 technologies: axum, sqlx-postgres, sqlx, SQLite, Postgres, Tokio, tower, Ratatui, crossterm, schemars, tracing, tracing-subscriber, OpenTelemetry, opentelemetry-otlp, and tracing-opentelemetry. Both are written in Rust.

- [atuinsh/atuin](https://seerepo.com/r/atuinsh/atuin): ✨ Making your shell magical
- [unionlabs/union](https://seerepo.com/r/unionlabs/union): The trust-minimized, zero-knowledge bridging protocol, designed for censorship resistance, extremely high security, and usage in decentralized finance.

## What they share and what sets them apart

- In common: axum, sqlx-postgres, sqlx, SQLite, Postgres, Tokio, tower, Ratatui, crossterm, schemars, tracing, tracing-subscriber, OpenTelemetry, opentelemetry-otlp, tracing-opentelemetry
- Only in atuin: rusqlite, sqlx-mysql, sqlx-sqlite, libsqlite3-sys, MySQL, objc2-foundation, ratatui-core, indicatif, ansi-to-tui, sql-builder, rpassword, argon2, rmcp, pulldown-cmark, minijinja, plist, yaml-rust2, metrics, listenfd, metrics-exporter-prometheus, tracing-appender, tracing-futures
- Only in union: net/http, Gorilla, moka, wasmtime, Svelte, SvelteKit, Supabase, @effect/platform, console, ed25519-dalek, github.com/rs/zerolog, Tailwind CSS, tailwind-merge, rehype-stringify, remark, remark-parse, unified, vfile, @effect/opentelemetry

## Side by side

| | atuin | union |
|---|---|---|
| Size | 240,516 lines written, 561 code files | 468,416 lines written, 1,841 code files |
| Who writes it | 1.2% of its commits signed by AI. With Claude Code | 0% of its commits signed by AI. With CodeRabbit |
| Activity | Last push November 7, 2026, 2,555 commits, 32,230 stars | Last push July 25, 2026, 13,299 commits, 73,725 stars |
| Tests | 64 test files. 15.3% of its code files have a test that imports them | 120 test files. 10.4% 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, atuin or union?

union, with 468,416 lines written; atuin has 240,516.

The proof: [unionlabs/union's code at commit 031785b](https://github.com/unionlabs/union/tree/031785bb6dc6b957c624e62bc64c184409c97d7b)

### Which has more GitHub stars, atuin or union?

union, with 73,725 stars; atuin has 32,230.

The proof: [unionlabs/union on GitHub](https://github.com/unionlabs/union)

### Which has more tests, atuin or union?

union, with 120 test files; atuin has 64.

The proof: [unionlabs/union's code at commit 031785b](https://github.com/unionlabs/union/tree/031785bb6dc6b957c624e62bc64c184409c97d7b)

### Which was updated more recently, atuin or union?

atuin: its last push was on November 7, 2026, and union's on July 25, 2026.

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

### Which has more commits signed by AI, atuin or union?

atuin: an AI signed 1.2% of its commits, with Claude Code.

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

## Sources

- atuinsh/atuin: Read on November 7, 2026, at commit 28fcb3d (https://github.com/atuinsh/atuin/tree/28fcb3db32e5550543fc7ed93537963e246abf7c)
- unionlabs/union: Read on November 5, 2026, at commit 031785b (https://github.com/unionlabs/union/tree/031785bb6dc6b957c624e62bc64c184409c97d7b)

## 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.