Turnstone
#10 in Agent FrameworksTurnstone · since 2026 (Gründung 2026; öffentlicher Launch laut LinkedIn-Post ca. 75 Tage vor Recherche, genaues Datum nicht belegt) · 2× · last seen Nov 08, 2026
27
Momentum
Turnstone (YC W26, operated by Crow Inc.) is a free, local-first Mac desktop app that runs persistent AI agents with a shared memory called the "Brain". Agents run on the AI subscriptions or API keys users already have (including ChatGPT, Claude, Gemini, Grok, OpenRouter). A paid Cloud plan (USD 49/month) keeps agents and Schedules running with the Mac closed. Note: the open-source project "turnstonelabs/turnstone" is a different product and was not included.
Momentum trend
11.08.09.11.
Features
| Autonomy Level | Agents run on Schedules without re-prompting; local Schedules need app open and Mac awake, Cloud Schedules run with Mac offline |
| Channels | Mac app, browser interface, iPhone beta; email, Slack, iMessage as send channels |
| License | Proprietary (commercial product; operated by Crow Inc.) |
| Modalities | Text chat; spreadsheets/documents as output; browser interaction (read sites, fill forms) |
| Platform | macOS (Mac desktop app); iPhone beta; browser access |
| Price | Free: $0 (Mac, with own AI subscription/API key); Cloud: $49/month |
| Release Date | Public launch 2026 (exact date not verified) |
| Tool/MCP Integrations | 60+ built-in apps (e.g. Gmail, Outlook, Slack, Notion, LinkedIn, iMessage, WhatsApp); own browser; MCP server |