Turnstone

Key facts: Turnstone climbed the Product Hunt charts on November 6, 2026 and has announced funding led by Y Combinator. It is a Grok Bot alternative that runs on the AI you already have: sign in with your Claude, ChatGPT, Gemini, Grok or Cursor subscription, connect an API key such as OpenRouter, or point to a self-hosted model such as Ollama on your Mac. When one subscription hits its usage limit, your agent moves to another and keeps working in the same conversation. Your first agent is a Chief of Staff that sets up an agent for each part of the job.

Plans: Completely free to use on your Mac, and the launch page says it will stay that way. You pay only for the AI plan you already have; Turnstone adds no credits, no meter and no second bill.

Best for: People who already pay for one or more AI subscriptions and want agents on top of them. Who should skip it: anyone who wants a hosted service that works with their Mac closed.

Pros

• Completely free on Mac, with no credits, meter or second bill
• Runs on the AI subscriptions you already pay for, and switches providers when one hits a limit
• A Chief of Staff agent that sets up one agent per part of the job
• Backed by Y Combinator, with free open-source models included if you pay for no AI yet

Watch out for

• Mac only today: the iPhone app, web app and Turnstone Cloud are still coming
• Your Mac must be open and signed in while your agents work
• A young product, so agent reliability at scale is still being proven

Best for

People who already pay for one or more AI subscriptions and want agents on top of them. Who should skip it: anyone who wants a hosted service that keeps working with their Mac closed, or a Windows user.

Pricing

Completely free to use on Mac, and the launch page says it will stay that way. You pay only for the AI plan you already have.

FAQs

What is Turnstone? AI teammates that run on the AI subscriptions you already pay for: Claude, ChatGPT, Gemini, Grok or Cursor, an API key, or a self-hosted model.

Is Turnstone really free? Yes, completely free to use on your Mac, and the launch page says it will stay that way.

What happens when one AI plan hits its limit? Your agent moves to another connected provider and keeps working in the same conversation.

Does it work on iPhone or the web? Not yet. Mac only today; the iPhone app, web app and Turnstone Cloud are coming soon.