Y Combinator Companies API

Unofficial daily-updated public API for all publicly launched Y Combinator companies.

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Y Combinator Companies API is an unofficial, daily-updated public API covering over 6,000 publicly launched YC companies, sourced from YC's own Algolia search index via a daily GitHub Actions workflow, with daily change summaries published in JSON and Markdown. It's for developers and researchers building tools or analyses on YC company data who want a structured, current source instead of scraping the YC website themselves.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Y Combinator Companies API - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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