Source: https://seerepo.com/compare/unionlabs/union/vs/vectordotdev/vector
Markdown source: https://seerepo.com/compare/unionlabs/union/vs/vectordotdev/vector.md
Description: union and vector share 11 technologies: axum, tower, sqlx-postgres, Postgres, sqlx, Tokio, Ratatui, crossterm, tracing, tracing-subscriber, and Tailwind CSS. Both are written in Rust.

# union vs vector

union and vector share 11 technologies: axum, tower, sqlx-postgres, Postgres, sqlx, Tokio, Ratatui, crossterm, tracing, tracing-subscriber, and Tailwind CSS. Both are written in Rust.

- [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.
- [vectordotdev/vector](https://seerepo.com/r/vectordotdev/vector): A high-performance observability data pipeline.

## What they share and what sets them apart

- In common: axum, tower, sqlx-postgres, Postgres, sqlx, Tokio, Ratatui, crossterm, tracing, tracing-subscriber, Tailwind CSS
- Only in union: net/http, Gorilla, moka, wasmtime, Svelte, SvelteKit, Supabase, @effect/platform, SQLite, console, ed25519-dalek, schemars, github.com/rs/zerolog, tracing-opentelemetry, OpenTelemetry, opentelemetry-otlp, tailwind-merge, rehype-stringify, remark, remark-parse, unified, vfile, @effect/opentelemetry
- Only in vector: aws-sdk-s3, tokio-postgres, Redis, lru, MongoDB, aws-sdk-kinesis, opendal, Kafka, AWS S3, warp, indicatif, aws-sdk-sts, azure_identity, parquet, quick-xml, csv, handlebars, jsonschema, metrics, azure_core, log, tracing-core, aws-sdk-iam

## Side by side

| | union | vector |
|---|---|---|
| Size | 468,416 lines written, 1,841 code files | 472,373 lines written, 1,238 code files |
| Who writes it | 0% of its commits signed by AI. With CodeRabbit | 0.9% of its commits signed by AI. With Claude Code, Cursor, and GitHub Copilot |
| Activity | Last push July 25, 2026, 13,299 commits, 73,725 stars | Last push November 4, 2026, 14,656 commits, 22,799 stars |
| Tests | 120 test files. 10.4% of its code files have a test that imports them | 242 test files. 28% 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, union or vector?

vector, with 472,373 lines written; union has 468,416.

The proof: [vectordotdev/vector's code at commit 1bac1b8](https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

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

union, with 73,725 stars; vector has 22,799.

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

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

vector, with 242 test files; union has 120.

The proof: [vectordotdev/vector's code at commit 1bac1b8](https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

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

vector: its last push was on November 4, 2026, and union's on July 25, 2026.

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

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

vector: an AI signed 0.9% of its commits, with Claude Code, Cursor, and GitHub Copilot.

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

## Sources

- unionlabs/union: Read on November 5, 2026, at commit 031785b (https://github.com/unionlabs/union/tree/031785bb6dc6b957c624e62bc64c184409c97d7b)
- vectordotdev/vector: Read on November 4, 2026, at commit 1bac1b8 (https://github.com/vectordotdev/vector/tree/1bac1b840fd5071a35cb8a1c66a857c3a555c9ca)

## 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.