Source: https://seerepo.com/compare/linera-io/linera-protocol/vs/unionlabs/union
Markdown source: https://seerepo.com/compare/linera-io/linera-protocol/vs/unionlabs/union.md
Description: linera-protocol and union share 13 technologies: axum, sqlx, Tokio, wasmtime, tower, sqlx-postgres, ed25519-dalek, tracing, tracing-subscriber, tracing-opentelemetry, OpenTelemetry, opentelemetry-otlp, and Tailwind CSS. Both are written in Rust.

# linera-protocol vs union

linera-protocol and union share 13 technologies: axum, sqlx, Tokio, wasmtime, tower, sqlx-postgres, ed25519-dalek, tracing, tracing-subscriber, tracing-opentelemetry, OpenTelemetry, opentelemetry-otlp, and Tailwind CSS. Both are written in Rust.

- [linera-io/linera-protocol](https://seerepo.com/r/linera-io/linera-protocol): Main repository for the Linera protocol
- [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, Tokio, wasmtime, tower, sqlx-postgres, ed25519-dalek, tracing, tracing-subscriber, tracing-opentelemetry, OpenTelemetry, opentelemetry-otlp, Tailwind CSS
- Only in linera-protocol: async-graphql-axum, lru, quick_cache, rocksdb, async-graphql, Vite, React, react-router-dom, indicatif, prometheus, log, tracing-chrome, Lucide
- Only in union: net/http, Gorilla, Postgres, moka, Svelte, SvelteKit, Supabase, @effect/platform, SQLite, console, Ratatui, crossterm, schemars, github.com/rs/zerolog, tailwind-merge, rehype-stringify, remark, remark-parse, unified, vfile, @effect/opentelemetry

## Side by side

| | linera-protocol | union |
|---|---|---|
| Size | 269,336 lines written, 587 code files | 468,416 lines written, 1,841 code files |
| Who writes it | 1.5% of its commits signed by AI. With Claude Code and GitHub Copilot | 0% of its commits signed by AI. With CodeRabbit |
| Activity | Last push September 18, 2026, 5,465 commits, 32,036 stars | Last push July 25, 2026, 13,299 commits, 73,725 stars |
| Tests | 200 test files. 24.5% 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, linera-protocol or union?

union, with 468,416 lines written; linera-protocol has 269,336.

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

### Which has more GitHub stars, linera-protocol or union?

union, with 73,725 stars; linera-protocol has 32,036.

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

### Which has more tests, linera-protocol or union?

linera-protocol, with 200 test files; union has 120.

The proof: [linera-io/linera-protocol's code at commit 672d97b](https://github.com/linera-io/linera-protocol/tree/672d97bb2fce3127db351069df72f1d225d8f263)

### Which was updated more recently, linera-protocol or union?

linera-protocol: its last push was on September 18, 2026, and union's on July 25, 2026.

The proof: [linera-io/linera-protocol's commits on GitHub](https://github.com/linera-io/linera-protocol/commits)

### Which has more commits signed by AI, linera-protocol or union?

linera-protocol: an AI signed 1.5% of its commits, with Claude Code and GitHub Copilot.

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

## Sources

- linera-io/linera-protocol: Read on November 7, 2026, at commit 672d97b (https://github.com/linera-io/linera-protocol/tree/672d97bb2fce3127db351069df72f1d225d8f263)
- 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.