Synth YC Application

Fall 2024Active

Synth went through Y Combinator in the Fall 2024 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: Fall 2024
Industry: B2BInfrastructure
Team size: 2
Status: Active
Launched: 2024

Founders

Josh Purtell

What Synth does

Choose a coding agent harness, model, and task dataset and optimize context and prompts to get the best performance for long-horizon tasks

Synth's YC application, reconstructed

Y Combinator application

Synth, Fall 2024 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Synth

Describe what your company does in 50 characters or less.

Prompt and Context Optimization for Coding Agents

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

We build a platform that lets users pick a coding agent harness, an AI model, and a relevant task dataset, then optimize prompts and context to maximize the agent's performance on long-horizon coding tasks. Essentially, we take those elements and tune them so coding agents do better at complex software problems.

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

We live in San Francisco, CA, and after YC we'll remain based here to tap into the local AI and developer ecosystem.

Explain your decision regarding location.

Staying in San Francisco lets us be close to a strong AI engineering talent pool and early adopters of developer tools. It's a natural place to grow given our focus on advanced coding agents.

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 Synth YC application?

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