Corsair YC Application

Winter 2025Active

Corsair went through Y Combinator in the Winter 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: Winter 2025
Industry: B2BEngineering, Product and Design
Team size: 2
Status: Active
Launched: 2025

Founders

Dev JainFounder

What Corsair does

What Corsair is: Corsair gives you (or your agent) safe access to hundreds of integrations. It natively handles all integration plumbing. The only code you write is the code that's specific to your use case. Your data stays yours. Why we wrote it: Integrations make products capable. Integrations are also frustrating to write. If you look at any codebase with integrations, 95% of the code is identical. It's all just basic plumbing. The part of the integration that is unique to a codebase and actually adds value is probably just a few lines. We shouldn't waste time writing and maintaining the 95% for a few lines. The developer community has just accepted that we do. Corsair handles the 95% so you don't have to. It's really hard to get wrong.

Corsair's YC application, reconstructed

Y Combinator application

Corsair, Winter 2025 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Corsair

Describe what your company does in 50 characters or less.

Integration Layer for AI Agents

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

We built Corsair to handle the integration plumbing for AI agents. It gives developers and their agents safe, straightforward access to hundreds of services without writing boilerplate code. The only code you write is what makes your use case unique. This saves time and reduces errors in managing integrations, letting users focus on their product's value.

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

We live in New York, NY, and after YC we plan to base the company here.

Explain your decision regarding location.

We're rooted in New York. Both founders live here now and have strong local ties. New York's tech and product talent pool matches what we need. Moving away after YC would slow us down.

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 Corsair YC application?

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