Monica AI vs Merlin AI
Monica is an all-in-one AI assistant with chat, writing and translation on every page, while Merlin offers multi-model access in a sidebar.
Merlin AI
4.8One AI assistant for summarising, writing and answering on any page.
Side-by-side comparison
| Monica AI | Merlin AI | |
|---|---|---|
| Rating | 4.9 / 5 | 4.8 / 5 |
| Reviews | 32,200 | 8,800 |
| Users | ~3M+ | ~900K+ |
| Pricing | Freemium · From $8.3/mo | Freemium · From $14.25/mo |
| Category | AI | AI |
| Developer | Monica | Foyer Labs |
| Last updated | 2026-06-09 | 2026-07-05 |
| Best for | People who want templates and translation alongside a general AI chat panel. | Generalists who want a single AI sidebar instead of five separate AI extensions. |
Final recommendation
Pick Monica for the richest free feature set. Pick Merlin for GPT/Claude/Gemini choice.
Frequently asked questions
Can I install Monica AI 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.
Keep researching
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