Harper
8.5#5 in grammar checkersFree planFree planAndroidiOSWebAPI
VisitHarper vs Poli
What both publish
| Fact | Harper | Poli |
|---|---|---|
| Browser extension | Yes | Yes |
| Desktop app | Yes | Poli is also available as a Mac app that works from the menu bar and inserts corrected or translated text into other apps. |
| Free plan | Yes | Yes |
| Integrations | The maker lists browser and editor extensions, a language server, a JavaScript library, a Rust crate, and native apps. | The Chrome extension works on websites including Gmail, Slack, Google Docs, and LinkedIn. |
| Purpose | Harper is a free, open-source grammar checker that flags capitalization, spelling, awkward phrasing, and grammar errors. | Poli corrects grammar and translates text, explaining its changes to help users improve. |
Harper plans
- FreeFree
- HarperFree
Poli plans
- Poli - Start—
- Poli Pro—
- FreeFree
- Pro—
- Starter—
Pick Harper if…
Harper suits writers seeking grammar and spelling checks with style suggestions, especially those who want web, browser-extension, or desktop access. Its single supported language makes it a fit for users who need that language coverage.
Pick Poli if…
Poli suits writers who want explanations while correcting grammar or translating, especially on supported websites or macOS.