head to head · open source
chrome-devtools-mcp vs Harper
chrome-devtools-mcp has 52,197 GitHub stars, 3,990 forks, 109 open issues and last shipped yesterday. Harper has 15,469 stars, 632 forks, 896 open issues and last shipped yesterday. chrome-devtools-mcp leads on adoption by 237% (52,197 vs 15,469 stars). chrome-devtools-mcp is written in TypeScript under Apache-2.0; Harper is written in Rust under Apache-2.0. chrome-devtools-mcp has attracted 8% as many forks as stars, Harper 4%. Harper was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| chrome-devtools-mcp | Harper | |
|---|---|---|
| GitHub stars | ★ 52K | ★ 15K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 4.0K | ⑂ 632 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick chrome-devtools-mcp if
- You weight community size — 52K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Harper if
- You want the Harper feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and Harper fits your workflow better
About chrome-devtools-mcp
chrome devtools mcp is an Apache 2.0 TypeScript Model Context Protocol server, distributed on npm, that gives coding agents such as Claude, Cursor, Copilot and Antigravity control over and visibility into a live Chrome browser through the full Chrome DevTools toolset.
read the full chrome-devtools-mcp overview →
About Harper
Harper is offline, privacy first grammar checker for English. It lives in productivity, browser extension, developer tools, and text editing ecosystem. Project is open source under Apache 2.0. GitHub metadata shows 15373 stars, 627 forks, and 896 open issues. Last push is 2026 09 14. Category is Productivity & Utilities / Browsers & Extensions. It uses Rust for core, WebAssembly for browser loading, language server for editors, JavaScript package for web and Node.js apps. It solves slow, costly, network dependent grammar checking. It replaces Grammarly and LanguageTool as named in README. Grammarly sends writing …
read the full Harper overview →
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Frequently asked questions
Is chrome-devtools-mcp or Harper more popular?
chrome-devtools-mcp has 52,197 GitHub stars and Harper has 15,469. chrome-devtools-mcp has the larger community by that measure.
Are chrome-devtools-mcp and Harper free?
Both are open source. chrome-devtools-mcp is licensed under Apache-2.0 and Harper under Apache-2.0. Neither carries a licence fee.
What is the difference between chrome-devtools-mcp and Harper?
chrome-devtools-mcp is written in TypeScript and Harper in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, chrome-devtools-mcp or Harper?
Choose chrome-devtools-mcp if you want the larger community (52,197 stars) or its Apache-2.0 licence terms. Choose Harper if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.