YC Rejects

In plain words

YC Rejects is a community for companies that were not accepted into Y Combinator's Summer 2018 batch. It provides a space for rejected applicants to connect with one another, share experiences, and continue building their ventures outside of the accelerator program.

written from the facts on this page · September 2026

From the sources

YC Rejects is the community for companies YC rejected for the Summer 18 batch.

Submit your startup idea and get feedback.

• 
  Apply to YC (Y Combinator)2017 · ▲386

  Curated collection of resources for founders applying to YC.

• 
  rally2020 · welcomerally.com · ▲157

  A community of rejected YC founders

• RC
  Rejection Conditioner for YC Applications2017 · rejectionconditioner.com · ▲177
• 
  YC Rejection2023 · ▲392

  Share your YC application and get a YC rejection email

• IM
  I Made YC Rejection Simulator2025 · yc-sim.vercel.app · ▲37

  Simulate your YC application rejection

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

  The definitive database of YC companies with all the metrics

• 
  SimCity, but with Permits▲882

  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 · 22h 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

• 
  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

• 
  Stripe Billing▲1,030

  Billing and subscriptions for fast-growing businesses

  Dev tools · 2018 · stripe.com

• 
  New Gmail▲935

  The new version of Gmail web

  Work · 2018 · blog.google

• 
  The Business Messenger by Intercom▲905

  More than just chat. Intercom's new app platform.

  Life & fun · 2018 · fin.ai

• 
  1.1.1.1 by Cloudflare▲871

  The Internet’s fastest, privacy-first DNS resolver

  Dev tools · 2018 · one.one.one.one

• 
  Artboard Studio▲732

  Online graphic design app mainly focused on product mockups.

  Growth · 2018 · artboard.studio

• 
  Grasshopper▲654

  The coding app for beginners by Google

  Dev tools · 2018