Attune YC Application

Spring 2025Active

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

Founders

Xin DingFounder

What Attune does

Attune makes blazingly fast build tools that require zero migration effort. As AI enables developers to write code faster than ever, slow builds are increasingly becoming the bottleneck in development velocity. Developers regularly lose hours of productivity every day waiting for their builds. Imagine being able to write code in 1 minute, but needing to wait 30 minutes to compile, deploy, and test it. Existing solutions either require painful migrations to new tools (e.g. Bazel) or rely on just using bigger servers to run your builds. Instead, we do native, first-class integrations into compilers and build systems. With Attune, you don't need to integrate a new tool. Just make a one-line change from `cargo build` to `hurry cargo build` for 20x faster builds. Eliza (ex-Google) and Xin worked together for 3 years at FOSSA, where Eliza was Head of Engineering and Xin was Head of Product. Eliza brings a decade of programming languages and build systems expertise, while Xin brings a decade of experience building developer tools products, most recently as VP of Product at Teleport (S15). Having experienced the pain of slow builds firsthand across hundreds of production codebases, we're building the solution we've always wanted.

Attune's YC application, reconstructed

Y Combinator application

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

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Attune

Describe what your company does in 50 characters or less.

Faster builds, zero effort.

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

We build build tools that speed up compilation by integrating directly into compilers and build systems. Attune requires no migration - developers just prepend a command like `hurry` to their existing build commands to get 20x faster builds. This fixes developer productivity bottlenecks caused by slow builds, especially as coding itself speeds up with AI.

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

We live in San Francisco, CA, and plan to keep the company based here during and after YC.

Explain your decision regarding location.

San Francisco is a hub for developer tooling and engineering talent. Being here lets us stay close to potential users and build relationships in the 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 Attune YC application?

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