YCS25· AI· Data· DevtoolsFulcrum
The agentic debugger for AI systems
ActiveChecked 24h ago
Founders
- Kaivalya HariharanFounder/CEO
- Uzay GiritFounder/CTO
Same space
Adjacent
Overlapping tags, a different niche.
PleomS25Agentic Business IntelligenceShared: agenticActive
SuperagentW24Security for AI-native developersShared: teaming, red, agentActive
EmdashW26Open-source Agentic Development EnvironmentShared: agentic, agent, environmentActive
FabraixS26The world's frontier hacker of AI agents.Shared: teaming, red, agentActive
BrowserOSS24The Open Source Agentic BrowserShared: agentic, agentActive
Also from S25 in AI
Batchmates in Summer 2025.
AcrelyS25Enterprise Voice AgentsActive
AdaptionalS25AI-powered insurance claims reviewActive
AgentMailS25Email Inboxes for AI AgentsActive
AlaraS25Procurement Platform for Dental OfficesActive
AlterS25Secure access control and authorization platform for agent workflowsActive
AlturS25Voice AI Agents for Debt CollectionActive
About Fulcrum
We build red-teaming agents that help developers fix their RL environments and improve their agents. Our customers are tired of being bullshitted by their agents.
San Francisco, CA, USA
Fulcrum: questions
Which YC batch was Fulcrum in?
Fulcrum was in Y Combinator's Summer 2025 batch (S25).
Is Fulcrum still active?
Y Combinator lists Fulcrum as active.
Who founded Fulcrum?
Fulcrum's founders, as listed on its YC page: Kaivalya Hariharan (Founder/CEO), Uzay Girit (Founder/CTO).
Where is Fulcrum based?
Fulcrum lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.