Klavis AI YC Application

Spring 2025Active

Klavis AI went through Y Combinator in the Spring 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: Spring 2025
Industry: B2B
Team size: 3
Status: Active
Launched: 2025

Founders

Xiangkai ZengFounder
Zihao LinFounder

What Klavis AI does

Powering frontier AI labs with real world MCP environments and complex, long-horizon agentic tool-use data.

Klavis AI's YC application, reconstructed

Y Combinator application

Klavis AI, Spring 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Klavis AI

Describe what your company does in 50 characters or less.

Live Environments for Training AI Agents

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

We build real-world multiple-choice problem environments (MCP environments) designed for training AI agents that must plan and use tools over long time horizons. Our platform produces complex, agentic tool-use data that AI labs use to benchmark and advance frontier AI research beyond typical training setups.

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

We do not have a fixed physical location currently. After YC, the company will be based where the team can best focus and collaborate, likely flexible or remote-first.

Explain your decision regarding location.

Our team members work remotely and prioritize flexibility for deep technical work. We want to remain location-independent to attract talent and scale efficiently without geographic constraints.

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 Klavis AI YC application?

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