Turnstone

Features

• Chief of Staff and one Agent per job. Your first Agent, the Chief of Staff, sets up an Agent for each part of your work. Each Agent is a persistent named conversation with its own job, model and memory, and any Agent can hand a task to another. Official source 1 ↗ · Official source 2 ↗
• Runs on the AI plan you already pay for. Sign in with ChatGPT (via the official Codex app), Claude (via Claude Code), Gemini, Grok, Cursor or OpenRouter, use an OpenAI or Anthropic API key, or run a local model with Ollama. You can switch an Agent's model mid-conversation. Official source 1 ↗ · Official source 2 ↗
• Shared local memory (the Brain). All Agents share one memory of your people, projects and decisions, stored as plain files on your Mac that you can open and correct; Turnstone says nothing you connect is used to train models. Official source 1 ↗ · Official source 2 ↗
• Connected apps and its own browser. Agents work across 60+ built-in apps such as Gmail, Slack, Notion, iMessage and WhatsApp, and each has its own tab in the Turnstone Browser for opening sites and filling in forms. Official source 1 ↗ · Official source 2 ↗
• Schedules and Automations. Ask for something like "every weekday at 9" and the Agent saves a Schedule, runs it and reports back in your chat. Official source 1 ↗ · Official source 2 ↗
• Drafts in your voice, with approval. It learns how you write in each app and drafts replies in your voice; nothing goes out until you send it, and each Agent can be set to Read only, Ask first or Always Allow. Official source 1 ↗ · Official source 2 ↗
• MCP server and Grok Bot import. Another AI such as Grok Bot, ChatGPT or Claude can connect to Turnstone's MCP server to create Agents and send them work, and a single Grok Bot can be imported from its x.ai marketplace link. Official source 1 ↗

Pricing & free limits

Billing details

Turnstone does not sell credits; usage counts against your own AI plan's limits, and with an API key you pay the provider directly. Official source 1 ↗

After the free first month, Cloud costs $49 a month; the Mac app stays free with or without it. Official source 1 ↗

Free access & limits

The free Mac app has no Turnstone usage meter; your limits are those of the AI plan or API key you connect. Official source 1 ↗ · Official source 2 ↗

Best for & limitations

A weekday morning brief on your meetings, what you owe people and anything urgent, delivered by a scheduled Agent. Official source 1 ↗

Drafting outreach and follow-up emails in your own voice for review before sending. Official source 1 ↗

Keeping your ChatGPT or Claude plan and adding other models to the same team of Agents instead of paying for credits. Official source 1 ↗ · Official source 2 ↗

Moving Grok Bots into Turnstone Agents through its MCP server or a marketplace link. Official source 1 ↗ · Official source 2 ↗

• Mac only for now. Cloud, iPhone and web apps are coming soon; Windows, Linux and Android are not available. Official source 1 ↗
• You supply the AI. Turnstone is not a model: apart from a set of free open-source models, you connect your own subscription, API key or local model, and if that subscription or key stops working, the parts of Turnstone that depend on it stop too. Official source 1 ↗ · Official source 2 ↗
• Agents need your Mac on until Cloud ships. Scheduled work runs while your Mac is on; keeping Agents working with the Mac closed is the coming-soon Cloud add-on. Official source 1 ↗ · Official source 2 ↗
• Free hosted models go through a third party. The free open-source models offered to people without their own AI run through the OpenCode Zen gateway rather than your own account. Official source 1 ↗