One AI assistant that plugs ChatGPT, Claude and Gemini into every tab
Estimated monthly website visits
Similarweb estimates for this domain, not active users. Only available observation months are shown; collection date is separate from the traffic period.
Collected Nov 11, 2026
This is our editors' assessment out of 5, not an average of user ratings. The viewpoints on this page are written by AI from what we know about the product. They are not customer reviews.
According to OpenAITools.app telemetry verified on 2026-11-11, Merlin AI (getmerlin.in) is an AI platform indexed under AI Assistant generating 1.38M monthly visits with a month-over-month traffic delta of +159.85K (+13.1%). Its primary geographic market is United States (15% traffic share), and it operates on a Freemium pricing model. Top competing alternatives by monthly volume include Sider (2.64M visits/mo), Monica (4.51M visits/mo), HARPA AI (537.46K visits/mo).
Essential browser extension for anyone working with multiple LLMs daily.
Shortcut key works instantly across web pages.
Saves opening separate tabs for Claude and GPT.
Extension updates occasionally reset login sessions.
AI-synthesized perspectives grounded in live site inspection, pricing structure, and category benchmarks — presented as editorial viewpoints rather than individual customer testimonials.
Switch between GPT, Claude, Gemini, DeepSeek, Mistral and Llama class models from a single interface instead of juggling separate subscriptions.
Summarize articles, YouTube videos, PDFs and documents in place, then ask follow-up questions grounded in that content.
Draft and reply to emails in Gmail, compose posts and comments for X and LinkedIn, and repurpose web pages or videos into blogs and articles.
Generate images from prompts using more than 20 image models and multiple aspect ratios for web and social output.
Build reusable knowledge bases, generate diagrams and charts from a prompt, and assemble custom chatbots from your own instructions and context.
Merlin is built around a simple idea: instead of opening a separate chat tab for every task, you summon one assistant with a click while staying inside whatever you are reading or working on. The extension injects a sidebar on any web page, so it can read the article, the PDF, the YouTube transcript or the Gmail thread you currently have open and respond with that context already loaded. That makes summarization, rewriting, replying and research feel like part of the page rather than a separate tool.
Under the hood Merlin routes requests across a broad set of models — OpenAI's GPT family, Anthropic's Claude, Google's Gemini, DeepSeek, Mistral, Meta's Llama and others — so you can pick the model that suits a task without holding separate subscriptions for each. Beyond chat there is an image generator with multiple models and aspect ratios, a search mode that answers questions from live web results, document and video summarization, and a library of saved prompts. Newer additions like Projects (reusable knowledge bases) and Crafts (generated diagrams, mind maps and charts) push it toward light research and prototyping work.
Merlin is available as a Chrome extension, a web app, an iOS app and an Android app with synced history, custom prompts and custom bots across devices. The vendor highlights GDPR, ISO 27001 and SOC 2 alignment for data handling, and positions itself as accessible in 200+ countries where some other assistants are restricted. It is squarely a productivity assistant rather than a developer platform.
Summarize lecture recordings, papers and PDFs, then query them for specific points with citations instead of re-reading everything.
Turn a YouTube video or article into blog posts, X threads and LinkedIn copy, and generate matching visuals from the same session.
Compose replies inside Gmail with the prior thread as context, and draft outreach messages without switching tools.
Upload XLS or CSV files and request quick insights, then visualize findings as diagrams without building a dashboard.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | Merlin AI | 1.38M | +13.1% | 50% direct | Freemium | Current |
| 1 | Sider Offers a similar browser sidebar experience with multi-model support, but features cleaner tab integration and smoother reading tools. | 2.64M | -10.6% | 64% direct | Freemium | vs Sider |
| 2 | Monica Provides comparable all-in-one browser assistance and multi-model chat, but includes more robust built-in painting and drawing suites. | 4.51M | -11.3% | 55% direct | Freemium | vs Monica |
| 3 | HARPA AI Combines browser AI chat with advanced web automation and data extraction, though with a steeper learning curve. | 537.46K | +99.3% | 76% direct | Freemium | vs HARPA AI |
| 4 | ChatHub Focuses on side-by-side multi-model comparison in a sidebar, but lacks Merlin's deeper document and video summarization workflows. | 322.62K | -13.9% | 59% direct | Freemium | vs ChatHub |
| 5 | Poe Aggregates diverse frontier models into one conversational interface, but operates primarily as a web/app client rather than a native extension. | 5.89M | +9.1% | 68% direct | Freemium | vs Poe |
| 6 | Chatbox Delivers a cross-platform AI chat client with local file Q&A, but requires desktop installation rather than browser extension access. | 567.17K | -16.1% | 58% direct | Freemium | vs Chatbox |
Offers a similar browser sidebar experience with multi-model support, but features cleaner tab integration and smoother reading tools.
Offers a similar browser sidebar experience with multi-model support, but features cleaner tab integration and smoother reading tools.
Provides comparable all-in-one browser assistance and multi-model chat, but includes more robust built-in painting and drawing suites.
Provides comparable all-in-one browser assistance and multi-model chat, but includes more robust built-in painting and drawing suites.
Combines browser AI chat with advanced web automation and data extraction, though with a steeper learning curve.
Focuses on side-by-side multi-model comparison in a sidebar, but lacks Merlin's deeper document and video summarization workflows.
Focuses on side-by-side multi-model comparison in a sidebar, but lacks Merlin's deeper document and video summarization workflows.
Aggregates diverse frontier models into one conversational interface, but operates primarily as a web/app client rather than a native extension.
Aggregates diverse frontier models into one conversational interface, but operates primarily as a web/app client rather than a native extension.
Delivers a cross-platform AI chat client with local file Q&A, but requires desktop installation rather than browser extension access.
Delivers a cross-platform AI chat client with local file Q&A, but requires desktop installation rather than browser extension access.
SpecialistProvides superior core reasoning and advanced coding agents, but lacks Merlin's seamless one-click browser tab integration and sidebar shortcuts.
SpecialistProvides superior core reasoning and advanced coding agents, but lacks Merlin's seamless one-click browser tab integration and sidebar shortcuts.
SpecialistExcels at nuanced document analysis and writing, but operates as a dedicated web workspace rather than a browser extension.
SpecialistExcels at nuanced document analysis and writing, but operates as a dedicated web workspace rather than a browser extension.
SpecialistDelivers superior citation-backed web research and real-time search, but lacks Merlin's multi-purpose browser writing tools and sidebar utilities.
SpecialistDelivers superior citation-backed web research and real-time search, but lacks Merlin's multi-purpose browser writing tools and sidebar utilities.
SpecialistOffers massive context windows and Google Workspace integration, but functions as a standalone web app rather than an inline sidebar.
SpecialistOffers massive context windows and Google Workspace integration, but functions as a standalone web app rather than an inline sidebar.
SpecialistSpecializes in predictive autocomplete and writing assistance, but provides less comprehensive general chat and video summarization features.
SpecialistSpecializes in predictive autocomplete and writing assistance, but provides less comprehensive general chat and video summarization features.
SpecialistIntegrates AI directly into an independent browser environment, whereas Merlin runs as an extension across existing browsers.
SpecialistIntegrates AI directly into an independent browser environment, whereas Merlin runs as an extension across existing browsers.
