harper vs cc-switch

harper and cc-switch share 9 technologies: Tokio, Tauri, @tauri-apps/api, objc2-app-kit, objc2-foundation, React, zip, Tailwind CSS, and CodeMirror. Both are written in Rust.

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What they share and what sets them apart

Automattic

harper

Offline, privacy-first grammar checker. Fast, open-source, Rust-powered

Rust17.4kRead on November 6, 2026, at commit d52aeacWhat is harper built with?

Only in harper

In common

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
harper180,779 lines written944 code files
cc-switch564,219 lines written821 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.
harper0.5% of its commits signed by AIWith Claude Code and Mistral Vibe
cc-switch1.7% of its commits signed by AIWith Claude Code, GitHub Copilot, and Cursor
ActivityFrom GitHub and its history, on the day SeeRepo read it.
harperLast push November 6, 20264,193 commits17,449 stars
cc-switchLast push November 4, 20263,432 commits151,729 stars
TestsThe files that test the code, and the share of code files a test imports.
harper112 test files1.6% of its code files have a test that imports them
cc-switch319 test files37.3% of its code files have a test that imports them

Frequently asked questions

Which is bigger, harper or cc-switch?
cc-switch, with 564,219 lines written; harper has 180,779.

The proof: farion1231/cc-switch's code at commit e217bfc

Which has more GitHub stars, harper or cc-switch?
cc-switch, with 151,729 stars; harper has 17,449.

The proof: farion1231/cc-switch on GitHub

Which has more tests, harper or cc-switch?
cc-switch, with 319 test files; harper has 112.

The proof: farion1231/cc-switch's code at commit e217bfc

Which was updated more recently, harper or cc-switch?
harper: its last push was on November 6, 2026, and cc-switch's on November 4, 2026.

The proof: Automattic/harper's commits on GitHub

Which has more commits signed by AI, harper or cc-switch?
cc-switch: an AI signed 1.7% of its commits, with Claude Code, GitHub Copilot, and Cursor; in harper, 0.5%.

The proof: the commits each tool signed in farion1231/cc-switch

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