Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector vs Merlin AI
Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector and Merlin AI both compete in the same corner of the Chrome Web Store (ai), 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; Merlin AI sits at about 900K users with 4.8 stars. On pricing, Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector is free while Merlin AI is freemium.
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!
Merlin AI
4.8One AI assistant for summarising, writing and answering on any page.
Side-by-side comparison
| Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector | Merlin AI | |
|---|---|---|
| Rating | 4.7 / 5 | 4.8 / 5 |
| Reviews | 5,800 | 8,800 |
| Users | ~5M+ | ~900K+ |
| Pricing | Free | Freemium · From $14.25/mo |
| Category | AI | |
| Developer | QuillBot (Course Hero), LLC | Foyer Labs |
| Last updated | 2026-08-24 | 2026-07-05 |
| Best for | Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more! | Generalists who want a single AI sidebar instead of five separate AI extensions. |
Final recommendation
Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector wins on adoption, but Merlin AI scores higher with reviewers — start there if ratings matter more.
Frequently asked questions
Can I install Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector and Merlin AI 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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