harper vs jan
harper and jan share 10 technologies: Tokio, Tauri, @tauri-apps/api, objc2-app-kit, objc2-foundation, PostHog, React, pulldown-cmark, zip, and Tailwind CSS. Both are written in Rust.
LinkedInWhat 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
- cached
- lru
- SvelteKit
- Svelte
egui
- lru-cache
- ammonia
- Fastlane
tracing
- tracing-wasm
- winit
- core-graphics
- egui-wgpu
- egui-winit
- uiautomation
- @fortawesome/free-solid-svg-icons
- quill
marked
- Font Awesome
- CodeMirror
- @docsearch/css
- Chart.js
- @docsearch/js
brace
- typed.js
- Drizzle
drizzle-zod
In common
janhq
jan
Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
Rust45.5kRead on November 6, 2026, at commit 879e6aeWhat is jan built with?Only in jan
- Hummingbird
- sqlx-sqlite
tauri-plugin-store
- SQLite
- sqlx
gio
rusqlite
- Vite
- TanStack
OpenAI- comfy-table
- indicatif
- Ratatui
- console
gtk
- rfd
- ed25519-dalek
- hmac
- keyring
- oauth2
- rmcp
agent-client-protocol
opencv-python
- png
- schemars
- log
- env_logger
psutil
objc2-web-kit
- webkit2gtk
- webview2-com
- ash
- calamine
- csv
- html2text
- infer
- pdf-extract
- quick-xml
class-variance-authority
tailwind-merge
sonner
- Radix UI
motion
- @streamdown/code
- @tanstack/react-virtual
dnd-kit
emoji-picker-react
- Framer
- react-textarea-autosize
- use-stick-to-bottom
vaul
- Lucide
@tabler/icons-react
ai
- streamdown
- react-markdown
shiki
- unist-util-visit
katex
rehype-katex
remark-gfm
- Zod
Side by side
harperjan
SizeLines written by people and agents, without generated ones; code files, without tests.
harper180,779 lines written944 code files
jan478,180 lines written949 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
jan0.5% of its commits signed by AIWith GitHub Copilot, Claude Code, Cursor, Factory, Jules, and Aider
ActivityFrom GitHub and its history, on the day SeeRepo read it.
harperLast push November 6, 20264,193 commits17,449 stars
janLast push November 5, 20267,455 commits45,500 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
jan527 test files48.9% of its code files have a test that imports them
Frequently asked questions
Which is bigger, harper or jan?
jan, with 478,180 lines written; harper has 180,779.
The proof: janhq/jan's code at commit 879e6ae
Which has more GitHub stars, harper or jan?
jan, with 45,500 stars; harper has 17,449.
The proof: janhq/jan on GitHub
Which has more tests, harper or jan?
jan, with 527 test files; harper has 112.
The proof: janhq/jan's code at commit 879e6ae
Which was updated more recently, harper or jan?
harper: its last push was on November 6, 2026, and jan's on November 5, 2026.
The proof: Automattic/harper's commits on GitHub
Which has more commits signed by AI, harper or jan?
In both, an AI signed 0.5% of their commits.
The proof: the commits each tool signed in Automattic/harper
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