YC Library

In plain words

YC Library is a content hub that centralizes Y Combinator's startup resources including videos, essays, and podcasts. It serves entrepreneurs and startup enthusiasts looking to learn from YC's expertise. The platform makes it easier to discover current content and browse historical materials, organizing lessons on building products people want across topics like startup strategy and business fundamentals.

written from the facts on this page · September 2026

From the sources

We’ve overhauled the YC Library to make it easier to find the latest videos, essays, and podcasts from around Y Combinator, and to help you explore some of the best YC content from over the years. Come learn how to make something people want.

YC's library of startup advice: essays and videos that teach you how to start a company.

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  Apply to YC (Y Combinator)2017 · ▲386

  Curated collection of resources for founders applying to YC.

• 
  The Y Combinator Database2017 · ycdb.co · ▲866

  The definitive database of YC companies with all the metrics

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  Y Combinator Podcast2017 · ycombinator.com · ▲531

  Y Combinators new podcast on starting a startup

• 
  The Y Combinator Database 2.02018 · ycdb.co · ▲604

  Everything you ever wanted to know about YC companies

• YS
  YC's startup advice, organized and searchable2020 · ycadvice.com · ▲161
• 
  How To Start A Startup 2014 · podcasts.apple.com · ▲343

  YC Stanford Class as an Audio Podcast Available on iTunes

• 
  SimCity, but with Permits▲862

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 20h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Resend▲1,325

  An entire collection of pre-built components with a much faster development experience.

  Dev tools · 2023 · resend.com

• 
  STORI AI▲1,316

  Your ideas become visually compelling branded social posts

  AI · 2023 · storiai.com

• 
  Kombai▲1,079

  A new AI model that you can prompt with UI designs

  AI · 2023 · kombai.com

• 
  User Persona Generator▲1,014

  Understand your audience without 50 interviews

  AI · 2023 · founderpal.ai

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  Lottielab▲869

  Create and ship lottie animations to sites and apps faster

  Dev tools · 2023 · lottielab.com

• 
  LLMs can generate valid JSON 100% of the time▲854

  Outlines is a Python library that focuses on text generation with large language models. Brandon and I are not LLM experts and started the project a few months ago because we wanted to understand better how the generation process works. Our original background is probabilistic, relational and symbolic programming. Recently we came up with a fast way to generate text that matches a regex (https://blog.normalcomputing.ai/posts/2023-07-27-regex-guide...). The basic idea is simple: regular expressions have an equivalent Deterministic-Finite Automaton (DFA) representation. We…

  AI · 2023 · github.com