Merlin

Merlin is an AI assistant that gives you access to many top AI models in one place, including models from OpenAI (ChatGPT), Google (Gemini), Anthropic and others. It works as a Chrome extension, a web app and mobile apps, so AI help is one click away on any website.

With Merlin you can chat with different models, summarise web pages and YouTube videos, write and reply to emails and social posts, research topics, write code and create images. Because it works directly on the page you are viewing, you can get answers without copying and pasting between tabs. The company reports more than 20 million users across over 200 countries.

Good fit if you: want to use several AI models without separate subscriptions and get AI help on any website.
Less ideal if you: only use one AI model and prefer its official app.

Pricing: free to start with daily limits; paid plans unlock more usage and advanced models.