Phases

Phases YC Application

Summer 2025Active

Phases went through Y Combinator in the Summer 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
Summer 2025
Industry
HealthcareHealthcare IT
Team size
3
Status
Active
Launched
2025

Founders

  • James Wall
    James WallCo-founder & CEO
  • Anton Zaliznyi
    Anton ZaliznyiCo-founder & Chief AI Officer
  • Jonathan van Wersch
    Jonathan van WerschCo-founder & CTO

What Phases does

Phases deploys AI agents to oversee clinical trials, improving operational performance, data quality, and audit readiness by identifying risks and taking actions autonomously to solve issues.

Phases's YC application, reconstructed

Y Combinator application

Phases, Summer 2025 batch. The real form questions, answered from public data.

  1. Founders2
  2. Company7
  3. Progress7
  4. Idea4
  5. Equity3
  6. Curious2
  7. Batch Preference1

Company

Company name

Phases

Describe what your company does in 50 characters or less.

Automated clinical trial oversight

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

We have built AI agents that autonomously monitor clinical trials, identify operational risks, improve data quality, and take actions to resolve issues before they escalate. Our product handles oversight and execution tasks traditionally done manually by clinical trial teams, helping sponsors run trials more efficiently and with better compliance.

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

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

Explain your decision regarding location.

San Francisco puts us close to biotech hubs, AI talent, and investors who understand healthcare IT. Being here lets us recruit skilled engineers and stay connected to clinical trial sponsors and CROs in the region.

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.

Frequently Asked Questions

Is this the real Phases YC application?

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

What YC batch was Phases in?

Phases was part of the Y Combinator Summer 2025 batch.

Who founded Phases?

Phases was founded by James Wall, Anton Zaliznyi, Jonathan van Wersch.

What does Phases do?

Automated clinical trial oversight and execution

How do I read the full reconstructed application?

Create a free Round Funded account. The full 26-answer version of Phases's application, and every other YC batch, is in YC Insights.

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