Belvedir YC Application

Summer 2026Active

San Francisco

Belvedir went through Y Combinator in the Summer 2026 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 2026
Industry: B2B
Location: San Francisco
Team size: 1
Status: Active
Launched: 2026

Founders

Zachary YuFounder/CEO

What Belvedir does

Belvedir makes it cheap and easy for anyone to make custom AI. We collect your agent traces through our SDK and autonomously train custom models + harnesses + routers, privately deploy them, and recursively improve them as they are used. Our customers have seen 10x reductions in inference costs and 2x increases on benchmark scores. Custom AI models are going to win. Belvedir is the infrastructure needed to make trillions of them.

Belvedir's YC application, reconstructed

Y Combinator application

Belvedir, Summer 2026 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Belvedir

Describe what your company does in 50 characters or less.

Custom Model Factory For Cheaper, Better, Faster AI

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

Belvedir is a platform that collects agent traces via an SDK, then trains, deploys, and manages custom AI models, harnesses, and routers for businesses. We automate this entire pipeline, so teams get custom models that run faster and cheaper than generic models. Every deployed model gets better as it's used. We focus on making it possible for anyone to operate production-grade custom AI, not just big tech.

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

San Francisco, CA, USA. The company will be based in San Francisco after YC too.

Explain your decision regarding location.

San Francisco is the AI hub. Being here means direct access to customers, talent, and the startup community.

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 Belvedir YC application?

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