Source: https://seerepo.com/compare/astral-sh/ruff/vs/parcel-bundler/parcel
Markdown source: https://seerepo.com/compare/astral-sh/ruff/vs/parcel-bundler/parcel.md
Description: ruff and parcel share 5 technologies: Tailwind CSS, anstyle, markdown, tracing, and log. Both are written in Rust.

# ruff vs parcel

ruff and parcel share 5 technologies: Tailwind CSS, anstyle, markdown, tracing, and log. Both are written in Rust.

- [astral-sh/ruff](https://seerepo.com/r/astral-sh/ruff): An extremely fast Python linter and code formatter, written in Rust.
- [parcel-bundler/parcel](https://seerepo.com/r/parcel-bundler/parcel): The zero configuration build tool for the web. 📦🚀

## What they share and what sets them apart

- In common: Tailwind CSS, anstyle, markdown, tracing, log
- Only in ruff: indicatif, console, csv, zip, jinja2, schemars, tracing-subscriber, console_log, fern, tracing-log
- Only in parcel: React, lightningcss, cssparser, html5ever, xml5ever, image, oxipng, Less, PostCSS, posthtml, Pug, Stylus, sugarss

## Side by side

| | ruff | parcel |
|---|---|---|
| Size | 988,162 lines written, 2,832 code files | 141,200 lines written, 239 code files |
| Who writes it | 0.4% of its commits signed by AI. With Claude Code, Codex, and GitHub Copilot | 2.5% of its commits signed by AI. With Claude Code, Codex, and Gemini CLI |
| Activity | Last push November 5, 2026, 17,985 commits, 50,458 stars | Last push November 4, 2026, 4,005 commits, 44,014 stars |
| Tests | 2,138 test files. 3.8% of its code files have a test that imports them | 1,603 test files. 25.1% 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, ruff or parcel?

ruff, with 988,162 lines written; parcel has 141,200.

The proof: [astral-sh/ruff's code at commit d017c82](https://github.com/astral-sh/ruff/tree/d017c82cf34810209d5bb402aa0118f4ee2e7a45)

### Which has more GitHub stars, ruff or parcel?

ruff, with 50,458 stars; parcel has 44,014.

The proof: [astral-sh/ruff on GitHub](https://github.com/astral-sh/ruff)

### Which has more tests, ruff or parcel?

ruff, with 2,138 test files; parcel has 1,603.

The proof: [astral-sh/ruff's code at commit d017c82](https://github.com/astral-sh/ruff/tree/d017c82cf34810209d5bb402aa0118f4ee2e7a45)

### Which was updated more recently, ruff or parcel?

ruff: its last push was on November 5, 2026, and parcel's on November 4, 2026.

The proof: [astral-sh/ruff's commits on GitHub](https://github.com/astral-sh/ruff/commits)

### Which has more commits signed by AI, ruff or parcel?

parcel: an AI signed 2.5% of its commits, with Claude Code, Codex, and Gemini CLI; in ruff, 0.4%.

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

## Sources

- astral-sh/ruff: Read on November 5, 2026, at commit d017c82 (https://github.com/astral-sh/ruff/tree/d017c82cf34810209d5bb402aa0118f4ee2e7a45)
- parcel-bundler/parcel: Read on November 6, 2026, at commit 0256839 (https://github.com/parcel-bundler/parcel/tree/0256839dee32fcca0a0cfd72f48e70ab757fa8ec)

## 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.