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#03 · Core Databases

YC First 1000 Customers Database

How 300+ YC Companies Got Their First 1000 Customers.

The actual channel and tactic for 300+ companies — cold email, Reddit, YC network, or one viral tweet. Sorted by category.

Get early access →Launching at Free

What's inside

  • · Structured rows — searchable, filterable, exportable
  • · Source link on every entry — verifiable in one click
  • · Founder, batch, category and outcome tagging
  • · Updated as new public information emerges
  • · Web-readable + PDF download
  • · Free for current subscribers; no email required

Early access

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We're shipping YC First 1000 Customers Database soon at Free. Drop your email below and we'll send it the day it launches — plus a subscriber discount.

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FAQ

What is the YC First 1000 Customers Database?
The actual channel and tactic for 300+ companies — cold email, Reddit, YC network, or one viral tweet. Sorted by category. It's part of the YC Insights database — the largest open library of Y Combinator learnings, built entirely from publicly available essays, batch pages, founder interviews and S-1 filings.
Who is the YC First 1000 Customers Database for?
Founders, operators and investors who want a structured view of the core databases side of the YC ecosystem. Whether you're applying to YC, picking an idea, or studying what's worked, this database compresses hundreds of hours of public research into one place.
Where does the data come from?
Everything is sourced from publicly available material: YC's own website, batch pages, founder interviews, partner talks, S-1 filings, and long-form podcasts. Every claim is linkable to a public source — no insider data, no leaks.
When does the YC First 1000 Customers Database launch?
It's shipping soon at Free. Add your email below and we'll send it the day it drops, plus a launch-day discount for early subscribers.
Is YC Insights affiliated with Y Combinator?
No. YC Insights is an independent research project. We are not affiliated with, endorsed by, or sponsored by Y Combinator. Everything we publish is built from publicly available Y Combinator material with sources linked.
What else is in the YC Insights database?
43 databases in total across founder origins, pivots, first-1000-customer stories, batch packs, vertical packs (AI, fintech, SaaS, consumer, healthtech, edtech), deep reports and master playbooks. Browse them all at /database.

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YC Insights is an independent resource. Not affiliated with or endorsed by Y Combinator. Built from publicly available material.