next.js vs rspack

next.js and rspack share 6 technologies: React, Tokio, lightningcss, cssparser, tracing, and tracing-subscriber. next.js is written in JavaScript and rspack in Rust.

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What they share and what sets them apart

In common

web-infra-dev

rspack

Fast Rust-based bundler for the web with a modernized webpack API 🦀

Rust13kRead on November 10, 2026, at commit ec5f6bdWhat is rspack built with?

Only in rspack

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
next.js2,412,034 lines written3,309 code files
rspack772,639 lines written1,689 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
next.js0.8% of its commits signed by AIWith Claude Code, Cursor, GitHub Copilot, and Devin
rspack1.6% of its commits signed by AIWith GitHub Copilot, Claude Code, Cursor, Codex, and Amp
ActivityFrom GitHub and its history, on the day SeeRepo read it.
next.jsLast push November 9, 202636,476 commits143,429 stars
rspackLast push November 10, 202610,168 commits12,973 stars
TestsThe files that test the code, and the share of code files a test imports.
next.js19,260 test files11.3% of its code files have a test that imports them
rspack13,282 test files2.9% of its code files have a test that imports them

Frequently asked questions

Which is bigger, next.js or rspack?
next.js, with 2,412,034 lines written; rspack has 772,639.

The proof: vercel/next.js's code at commit 798f6f3

Which has more GitHub stars, next.js or rspack?
next.js, with 143,429 stars; rspack has 12,973.

The proof: vercel/next.js on GitHub

Which has more tests, next.js or rspack?
next.js, with 19,260 test files; rspack has 13,282.

The proof: vercel/next.js's code at commit 798f6f3

Which was updated more recently, next.js or rspack?
rspack: its last push was on November 10, 2026, and next.js's on November 9, 2026.

The proof: web-infra-dev/rspack's commits on GitHub

Which has more commits signed by AI, next.js or rspack?
rspack: an AI signed 1.6% of its commits, with GitHub Copilot, Claude Code, Cursor, Codex, and Amp; in next.js, 0.8%.

The proof: the commits each tool signed in web-infra-dev/rspack

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