Fulcrum YC Application

Summer 2025Active

Fulcrum went through Y Combinator in the Summer 2025 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Summer 2025
Industry: B2BAnalytics
Team size: 2
Status: Active
Launched: 2025

Founders

Kaivalya HariharanFounder
Uzay GiritFounder

What Fulcrum does

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.

Fulcrum's YC application, reconstructed

Y Combinator application

Fulcrum, Summer 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Fulcrum

Describe what your company does in 50 characters or less.

The agentic debugger for AI systems

What is your company going to make? Please describe your product and what it does or will do.

We build red-teaming agents that help developers fix their reinforcement learning environments and improve their AI agents. Our product simulates adversarial testing and debugging of RL systems so users can identify failures and blind spots in their AI models and environments.

Where do you live now, and where would the company be based after YC?

We live in San Francisco, CA, and after YC we will remain based here to stay close to AI research and developer communities.

Explain your decision regarding location.

San Francisco is where the cutting-edge AI work and talent is concentrated. Being here provides direct access to early customers who build RL agents and need better debugging.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Fulcrum YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Fulcrum's public data (launch notes, founder backgrounds, product description). It shows how a company like Fulcrum would present itself to YC, not the text they submitted.