Libretto YC Application

Spring 2025Active

Libretto went through Y Combinator in the Spring 2025 batch as a Healthcare 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: HealthcareHealthcare Services
Team size: 2
Status: Active
Launched: 2025

Founders

Tanishq KancharlaFounder
Michael KronovetFounder

What Libretto does

Libretto is an open-source CLI that lets agents turn website workflows into fast, reusable scripts you can deploy The problem: Most browser automation tools work by sending an AI agent to operate a website in real time, like a robot typing and clicking on your behalf. This is slow, expensive, and unpredictable. They rely on fragile DOM parsing that breaks on legacy and complex sites, and you can never fully trust what the agent will do on unintuitive or inconsistent workflows. Our approach: Libretto helps your coding agents generate workflows as actual, readable code during development, not at runtime. Under the hood it combines Playwright with direct in-session network/API calls for reliability and bot detection evasion. It also supports step-through debugging and a read-only mode to prevent accidental data changes while your agent builds and debugs workflows. This makes Libretto cheaper, faster, and easier to maintain, especially for more complex websites and high stakes workflows.

Libretto's YC application, reconstructed

Y Combinator application

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

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Libretto

Describe what your company does in 50 characters or less.

Turn website workflows into reliable APIs

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

We built Libretto, an open-source CLI that turns website workflows into reusable, reliable scripts. Unlike typical browser automation tools that act like AI robots clicking and typing in real time, Libretto captures workflows as readable code during development. It mixes Playwright-driven interactions with direct network and API calls under the hood, making automation faster, cheaper, and more stable, especially for complex or legacy healthcare sites.

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

We live in San Francisco, CA and the company will remain based here after YC.

Explain your decision regarding location.

San Francisco has the talent and ecosystem we need to build and scale Libretto. Being here puts us closer to early users, potential partners, and YC's support.

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 Libretto YC application?

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