Bloom YC Application

Spring 2025Active

Bloom 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: 2
Status: Active
Launched: 2025

Founders

Sirian Maathuis
David Oort Alonso

What Bloom does

Bloom lets you vibe code cross-platform apps and test them on your phone natively in seconds. Unlike other vibe code tools, Bloom deploys a backend for you, so you can build functional MVPs and personal apps, not just toys.

Bloom's YC application, reconstructed

Y Combinator application

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

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Bloom

Describe what your company does in 50 characters or less.

Build and share mobile apps in seconds

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

We built Bloom, a platform that lets anyone create cross-platform mobile apps using vibe code and instantly test them on their phone. Unlike other vibe code tools, Bloom also deploys a backend for you so apps go beyond simple demos and become functional MVPs and personal projects.

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

We currently work remotely without a fixed base. After YC, we plan to base the company where we can best focus on building, likely remote or in a tech hub depending on what makes sense.

Explain your decision regarding location.

We want flexibility to move or stay remote to optimize building speed, team focus, and access to resources, rather than committing to one location prematurely.

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 Bloom YC application?

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