ChatGPT, Claude, and Gemini are excellent single-user AI tools — one person, one AI, one conversation. Thinkpool is built for a different shape of problem: two people thinking together with an AI in the room. Both of you write into the same live thread; the AI (called Pool) joins in only when asked. That is the whole difference, and it changes what the tool is for.
| Thinkpool | ChatGPT / Claude / Gemini | |
|---|---|---|
| Built for | Two people + one AI in the same conversation | One person talking to an AI |
| How a second person joins | Opens a link and types into the same live thread | Screen sharing, copy-pasting between chats, or read-only shared transcripts |
| When the AI speaks | When asked — Pool stays quiet until one of you taps it in | Replies to every message |
| Human-only side channel | Whispers — your partner reads them, the AI cannot | None |
| Does the second person need an account? | Yes — free, via one link | Yes, their own separate account |
| Free tier | 50 AI responses a month, 5 sessions | Yes, with usage limits |
Use ChatGPT, Claude, or Gemini when you are working alone — research, solo drafting, coding, learning. They are built for that and they are very good at it.
Use Thinkpool when the thinking involves another person — deciding something hard together, processing a situation, drafting something you both have to ship, untangling a problem with four eyes instead of two.
You can share a read-only transcript link. The other person can read it, but they can't write into it — to contribute they have to copy text back to you, or you take turns at one keyboard. Thinkpool gives both people a live cursor in the same conversation, plus a whisper channel the AI can't read.
Thinkpool has a free plan (50 AI responses a month). Paid plans start at €10/month. The single-user tools have their own free tiers and paid plans around a comparable price — the difference isn't cost, it's what the tool is built for.