Merlin AI vs Swirl: which multi-model chat app fits your day?

The short version

Merlin and Swirl start from the same observation: no single model is best at everything, so put several of them behind one interface. They diverge on what the product is for. Merlin is a front door to models, with a browser extension that follows you around the web. Swirl is a place where work accumulates, with memory and documents that survive the conversation.

What Merlin does well

• A genuinely generous free tier: 102 queries a day, which covers casual use without paying.
• A browser extension that puts the same assistant on any page, which is the fastest way to summarise or rewrite something you are already reading.
• Wide model coverage, including image and video generation in the same subscription.
• Agents and PDF chat, so it can do more than answer a question.
• A cheap annual price relative to its monthly one.

What Swirl does differently

• Memory is the product, not a setting. Swirl extracts what matters from a conversation and carries it into the next one, including when you switch models.
• You can read, edit, and delete every memory entry from the Memory tab, so the context is yours rather than a black box.
• Answers can become living documents and visualisations that stay editable instead of being copied into another app.
• Integrations over MCP connect the same memory to Gmail, Calendar, and Notion.
• Pricing starts at $5, with a $12 plan that sits well below the usual $20 to $29.

Price, side by side

At the time of writing, in October 2026, Merlin Pro is listed at $29 a month, or $19 a month when billed annually at $228. Teams is $19 per seat monthly, or $15 annual, with a two-seat minimum. Swirl is $5 for Mini, $12 for Turbo, and $30 for Mega, with optional top-ups from $5 to $500 and no annual lock-in. Both companies change prices, so check each pricing page before you decide.

For a single daily user, the relevant comparison is $12 against $29. That is the whole pitch: the same class of models, plus memory, for less than half of Merlin's monthly price. Merlin's annual price narrows the gap to $7, which is a real difference but not a decisive one.

Free tier: 102 a day versus five, once

Merlin's free plan is the better free product. If you ask a handful of questions a day and do not need memory, you can use Merlin indefinitely without paying, and that is a legitimate reason to choose it. Swirl's five free messages are a trial, not a lifestyle. They exist so you can test the memory and the model picker before deciding, not so you can avoid paying forever.

Memory is the real difference

Every chat app keeps your conversation history. That is not memory. Memory is what happens when the product decides which facts, preferences, and decisions are worth carrying forward, stores them somewhere you can inspect, and puts them in front of the model the next time they are relevant.

In Swirl that is a visible list. It fills as you work, it can be corrected when it is wrong, and it can be deleted. Because it sits above the models rather than inside one of them, switching from a fast model to a heavy one does not reset what the app knows about your project. That is the difference between a chat app with history and a chat app with memory.

Which should you pick?

• Choose Merlin if you mainly want many models cheaply, you use a browser extension constantly, or you want to stay on a free plan indefinitely.
• Choose Swirl if you keep coming back to the same projects, you are tired of re-explaining context, or you want the output to stay usable after the chat ends.
• Use both for a week if you are unsure. Five free messages and 102 free queries cost nothing, and the answer will be obvious after the second project.