bitrig YC Application

Summer 2025Active

bitrig 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: B2BEngineering, Product and Design
Team size: 3
Status: Active
Launched: 2025

Founders

Kyle MacomberFounder
Tim DonnellyFounder
Jacob XiaoFounder

What bitrig does

Bitrig is the only vibe coder that writes native Swift, which is how the top mobile apps are coded. It's like Lovable for iPhone apps. Kyle and Jacob are creators of SwiftUI, Apple's UI framework for building modern iOS apps, and led its development for the past 10 years. Tim was co-founder and designer of Storehouse, where he won an Apple Design Award and was later acquired by Square. Download bitrig from the App Store:

bitrig's YC application, reconstructed

Y Combinator application

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

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

bitrig

Describe what your company does in 50 characters or less.

Vibe code, test, and deploy Swift apps on iPhone

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

We built bitrig, a vibe coding environment that lets developers write native Swift code, test it, and deploy apps entirely from their iPhone. It's for mobile developers who want to move fast without needing a Mac or complicated toolchains.

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

We live in San Francisco and the company is based here too.

Explain your decision regarding location.

San Francisco is where we all are, in the center of iOS development. It puts us close to our users and the broader Apple ecosystem.

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 bitrig YC application?

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