Haystack
YC S24New York City, US · Founded 2024 · 2 employees · 2 known investors
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Haystack is a GitHub-integrated system that evaluates AI-generated pull requests by analyzing code context, diffs, agent reasoning, and test results to determine whether changes can be merged, require fixes, or need human review. It helps engineering teams manage high volumes of AI-generated code changes while maintaining quality standards and focusing human review effort on complex decisions.
Also known as Haystack Software
Founders & leadership· Y Combinator alumni (S24)
Haystack was founded in 2024 by Jake Yatvitskiy and Akshay Subramaniam.


Investors · 2
Competitors · 4
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In the news
The Weekly Notable Startup Funding Report: 7/6/26 – AlleyWatchalleywatch.com · Jul 2026Frequently asked questions
- What does Haystack do?
- Haystack is a GitHub-integrated system that evaluates AI-generated pull requests by analyzing code context, diffs, agent reasoning, and test results to determine whether changes can be merged, require fixes, or need human review. It helps engineering teams manage high volumes of AI-generated code changes while maintaining quality standards and focusing human review effort on complex decisions.
- Who founded Haystack?
- Haystack was founded by Jake Yatvitskiy, Akshay Subramaniam in 2024.
- Who are Haystack's investors?
- Haystack's investors include Y Combinator, Day One Ventures.
- Where is Haystack headquartered?
- Haystack is headquartered in New York City, US.





