Merlin
Merlin is a free AI chat assistant from Foyer that puts leading models, including ChatGPT, Gemini, Claude and Mistral, behind one login. Ask questions on any website from a Chrome extension, summarize YouTube videos and PDFs, draft emails and posts, generate diagrams, and chat with your own documents. It works on web, iOS and Android, with 102 free queries every day.
What is Merlin?
Merlin is an AI chat assistant developed by Foyer that aggregates leading large language models, including OpenAI's ChatGPT and o-series, Google Gemini, Anthropic Claude, DeepSeek, Mistral and Llama, into a single chat interface. Rather than paying for several separate subscriptions, users sign in once and switch between the latest models as soon as they go live, choosing speed or reasoning power for each task. It is available as a web app, a Chrome browser extension, and native iOS and Android apps, with chat history synced across every device.
The Chrome extension is central to the experience. Pressing Ctrl or Cmd plus M summons Merlin over any website, so people can get context-aware answers, summarize pages, and rewrite or repurpose content without opening a new tab. On Google search results it automatically summarizes and answers beneath the query at no query cost. Merlin also adds buttons inside Twitter (X), LinkedIn, YouTube and Gmail for drafting replies, posts and emails in context, and it can summarize and transcribe YouTube videos with timestamps.
Merlin goes beyond ordinary chatbots with three trademarked feature sets. Projects let users upload documents, links and notes to build reusable knowledge bases that inform later answers. Crafts turns a prompt into flowcharts, mind maps, charts and more than twenty diagram types, and generates working React and Shadcn code snippets. Live Search combines real-time web sources with reasoning models for research. Users can add context from PDFs, presentations and spreadsheets, generate images with more than twenty image models, build custom bots and prompt libraries, and translate across more than twenty-five languages.
Merlin offers a free tier with 102 queries per day, plus Pro and Teams subscriptions. It emphasizes security with GDPR, ISO 27001 and SOC 2 compliance, and is used by more than twenty million people across two hundred countries. Because the same account powers every surface, Merlin fits neatly into existing habits. It can summarize a competitor's blog while you browse it, turn a recorded lecture or meeting video into notes, help answer a customer email without leaving the inbox, and produce a first draft of a social post from a link. The extension also works on Google Sheets and database clients for writing queries on the fly, and uploaded XLS or CSV files can be questioned for quick insights. Free searches on Google cost nothing, so casual usage stays comfortably within the daily allowance.
Merlin Core Features
Access ChatGPT, Gemini, Claude, DeepSeek, Mistral and Llama from one subscription
Press Ctrl or Cmd plus M to ask AI on any website without switching tabs
Summarize and transcribe YouTube videos, PDFs, presentations and web articles
Upload documents in Projects to build reusable knowledge bases for tailored answers
Create mind maps, flowcharts, charts and twenty-plus diagram types with Crafts
Draft replies, posts and emails inside Gmail, LinkedIn, X and Twitter in one click
Generate images with twenty-plus image models and flexible aspect ratios for social media
Build custom bots and prompt libraries that sync across web, iOS and Android
Who is Merlin for?
Merlin suits anyone who wants the power of several premium AI subscriptions without paying for each one separately. Students use it to summarize long lecture documents, transcribe YouTube videos, build course bots for homework help, and check or humanize their writing before submitting assignments. Marketers and content creators lean on its Projects feature to store brand voice and knowledge bases, then repeatedly generate SEO-friendly blogs, articles, ad copy and social posts from any web page or video. Entrepreneurs use the Chrome extension to brainstorm with mind maps and twenty-plus diagram types, and to draft cold outreach messages directly inside Gmail, LinkedIn and X without switching tabs. Developers appreciate being able to add codebase documentation to Merlin's knowledge, generate React and Shadcn component snippets, debug with context, and summon the assistant over any selected text. Consultants, product managers and analysts use live search alongside uploaded spreadsheets and reports to produce precise, up-to-date research and turn raw data into interactive charts. Small teams and larger organizations can buy per-seat Teams plans, while individual power users choose Pro for unlimited queries. Beginners and non-technical users benefit most from the simple browser extension and the Ctrl plus M shortcut, which delivers instant answers on Google search results and inside the sites they already visit. Because Merlin is available in more than two hundred countries, it also appeals to people in regions where ChatGPT and other leading models are restricted, and its support for translation across more than twenty-five languages helps multilingual users. Anyone who is tired of juggling separate ChatGPT, Claude, Gemini and Mistral accounts, and who wants a single, affordable assistant that follows them across web, desktop browser, iPhone and Android, is a natural fit.
Merlin Use Cases
Students summarizing lecture documents and videos into study aids with citations
Marketers repurposing web content into SEO-friendly blogs, articles and ad copy
Developers generating React and Shadcn snippets and debugging with codebase context
Consultants running real-time research and turning data into interactive charts
Entrepreneurs drafting cold outreach messages on Gmail, LinkedIn and X
Analysts uploading spreadsheets and querying them for quick insights
Q&A teams buying shared per-seat plans with central billing and admin controls
Multilingual users translating and writing across more than twenty-five languages
Merlin Pros and Cons
Pros
- One affordable subscription replaces several premium AI accounts that cost far more monthly
- Free tier offers 102 queries every day, enough to test top models before paying
- Works everywhere through a Chrome extension, web app, iPhone and Android apps with synced history
- Projects and Crafts turn a basic chatbot into a research and diagramming workspace
- Strong privacy posture with GDPR, ISO 27001 and SOC 2 certified data security
Cons
- Advanced models consume roughly thirty queries each, so the free daily allowance drains quickly
- Several of the best features rely on the Chrome extension, which limits other browsers
- Teams pricing is not published on the homepage and needs a sales conversation
FAQ About Merlin
Merlin Pricing
Freemium: a free tier includes 102 queries per day, Pro costs $19 per month billed annually, and Teams is priced per member for teams of five or more.
Check official pricingFree
102 free queries every day across GPT, Claude, Gemini, Mistral and other models, with no credit card required to start.
Pro
Unlimited queries for individuals, advertised at $19 per month billed annually, replacing several separate AI subscriptions.
Teams
For teams of five or more, priced per team member with shared billing and team-wide access.
Merlin Alternatives
Google AI Studio
Google AI Studio is a free browser workspace for building with Gemini models. It pairs a prompt playground for text, image, audio and video with structured output, function calling, Google Search grounding, API key management and one-click code export, and deploys finished projects straight to the Gemini API, which bills per token beyond its free tier.
SpicyChat AI
SpicyChat AI hosts a large library of community-made characters for text roleplay, spanning romance, fantasy, horror, and anime scenarios with NSFW content allowed. Chat free in a queue-based system, create personas, lorebooks, and your own bots, or pay for faster generation, longer memory, and advanced models like SpicyXL. Niche tags number in the hundreds, and an Android app handles mobile chat.
Liberty AI
Liberty AI is a free-tier chat assistant built on decentralized compute and zero-data-retention providers. It runs open-source models, keeps conversations out of Big Tech training pipelines, offers Ghost Mode and hardware TEE processing for sensitive queries, and bundles real-time search plus image and video generation for individuals and small teams, priced from $0 to $99.99 a month.