Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector vs Justdone: GPT-4o AI Writing Assistant & Grammar Checker
Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector 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. Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector has roughly 5M users and a 4.7-star average; Justdone: GPT-4o AI Writing Assistant & Grammar Checker sits at about 200K users with 3.7 stars.
Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector
4.7Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more!
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
| Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector | Justdone: GPT-4o AI Writing Assistant & Grammar Checker | |
|---|---|---|
| Rating | 4.7 / 5 | — |
| Reviews | 5,800 | — |
| Users | ~5M+ | — |
| Pricing | Free | Free |
| Category | Writing | |
| Developer | QuillBot (Course Hero), LLC | https://justdone.com |
| Last updated | 2026-08-24 | 2026-09-06 |
| Best for | Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more! | Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more. |
Final recommendation
Pick Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector — it leads on both installs and review scores.
Frequently asked questions
Can I install Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector 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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