1. Merlin AI
One AI assistant for summarising, writing and answering on any page.
Why it replaces Monica AI: Another AI extension worth comparing against Monica AI.
Monica AI is a strong option, but it is not the right fit for everyone. Below are 3 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
Monica bundles chat, translation, article summarising and writing help into one sidebar, with prompt templates for common jobs like replying to emails or rewriting product copy.
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Monica AI (original) | 4.9 | 3M+ | Freemium | People who want templates and translation alongside a general AI chat panel. |
| Merlin AI | 4.8 | 900K+ | Freemium | Generalists who want a single AI sidebar instead of five separate AI extensions. |
| Perplexity | 3.8 | 400K+ | Freemium | Researchers and analysts who need answers they can trace back to a source. |
| ChatGPT for Google | 0.0 | 0 | Free | Searchers who want a synthesised answer without abandoning normal search results. |
One AI assistant for summarising, writing and answering on any page.
Why it replaces Monica AI: Another AI extension worth comparing against Monica AI.
Answer engine with cited sources built into the browser.
Why it replaces Monica AI: Another AI extension worth comparing against Monica AI.

Shows AI answers alongside your normal search results.
Why it replaces Monica AI: Another AI extension worth comparing against Monica AI.
Direct comparisons with the extensions people weigh against it.
Merlin AI is the closest match. Another AI extension worth comparing against Monica AI.
Yes — ChatGPT for Google are free.
Common reasons are pricing, missing sync or team features, and specific limitations: Free quota is small; Interface is dense.