Turnstone
YC W26 · Active · Work with agents that already know you
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 Spine AIShared: work done, real work, spinActiveAI, Devtools | AI, Devtools | Active | YCS23 |
 DockShared: work done, spin, agentActiveAI | AI | Active | YCS26 |
 Induction LabsShared: already know, work, onceActiveAI, Devtools | AI, Devtools | Active | YCS26 |
 NixoShared: already know, workActiveAI | AI | Active | YCS25 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 PentagonShared: work done, agentActiveAI | AI | Active | YCX26 |
 StampShared: second brain, calendar, emailActiveAI | AI | Active | YCW25 |
 AsideShared: real work, already, knowActiveAI | AI | Active | YCF25 |
 Simple AIShared: agent already, know, liveActiveAI | AI | Active | YCS24 |
 ConvoyShared: already know, workActiveDevtools | Devtools | Active | YCW22 |
Also from W26 in AI
All of W26| Company | Category | Status |
|---|---|---|
 /dev/fast/dev/fast is the AI-native code forgeActiveAI, Devtools | AI, Devtools | Active |
 10x ScienceThe AI-native platform for next-generation protein characterization.ActiveAI | AI | Active |
 21stUI building blocks for the agentic internetActiveAI, Devtools | AI, Devtools | Active |
 AemonThe Forward-Deployed AI Research EngineerActiveAI, Devtools | AI, Devtools | Active |
 Agentic FabriqThe control plane for AI agents.ActiveAI | AI | Active |
 Alt-XBuilding the best venue for private markets exposure.ActiveAI, Data | AI, Data | Active |
Founders
- Aryan VijFounder/CEO
- Jai BhatiaFounder/CTO
About Turnstone
Turnstone is the AI workspace where your agents already know you. Connect your apps (e.g. email, calendar, Slack, Drive) and your local folders. Turnstone turns all of it into your second brain and continuously updates it. Spin up agents (e.g. chief of staff, research, GTM) that all share that brain, so you stop re-explaining yourself and start getting real work done. It all lives on your machine and runs on any model you already pay for. Ask your agent once, and it's done.
- YC batch
- W26 · Winter 2026
- Status, per YC
- Active
- Category
- AI
- Team size
- 3
- Location
- San Francisco, CA, USA
- Founded
- 2026
- Checked
- 32m ago
YC tags: AI
Turnstone: questions
Which YC batch was Turnstone in?
Turnstone was in Y Combinator's Winter 2026 batch (W26).
Is Turnstone still active?
Y Combinator lists Turnstone as active.
Who founded Turnstone?
Turnstone's founders, as listed on its YC page: Aryan Vij (Founder/CEO), Jai Bhatia (Founder/CTO).
Where is Turnstone based?
Turnstone lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.