LanguageTool vs Justdone: GPT-4o AI Writing Assistant & Grammar Checker
LanguageTool and Justdone: GPT-4o AI Writing Assistant & Grammar Checker both compete in the same corner of the Chrome Web Store (grammar), but they are built for different users. LanguageTool has roughly 2M users and a 4.7-star average; Justdone: GPT-4o AI Writing Assistant & Grammar Checker sits at about 200K users with 3.7 stars. On pricing, LanguageTool is freemium while Justdone: GPT-4o AI Writing Assistant & Grammar Checker is free.
Justdone: GPT-4o AI Writing Assistant & Grammar Checker
Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more.
Side-by-side comparison
| LanguageTool | Justdone: GPT-4o AI Writing Assistant & Grammar Checker | |
|---|---|---|
| Rating | 4.7 / 5 | — |
| Reviews | 12,600 | — |
| Users | ~2M+ | — |
| Pricing | Freemium · From $4.99/mo | Free |
| Category | Writing | Writing |
| Developer | LanguageTool | https://justdone.com |
| Last updated | 2026-06-20 | 2026-09-06 |
| Best for | Multilingual writers and privacy-conscious teams who want a self-hostable alternative to Grammarly. | Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more. |
Final recommendation
Pick LanguageTool — it leads on both installs and review scores.
Frequently asked questions
Can I install LanguageTool and Justdone: GPT-4o AI Writing Assistant & Grammar Checker at the same time?
Yes, Chrome runs them independently. Keep both only if they do different jobs; if they overlap, pick one, because each active extension adds memory use, page scripts and another set of permissions.
Where do the ratings and install numbers come from?
From each extension's public Chrome Web Store listing. They can lag the live store slightly, and a dash means the figures have not been synced yet.
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