Stats
Y Combinator · Winter 2018, Summer 2018 · 1 November 2026

What domains do YC’s 2018 startups use?

Of the 259 startups in Y Combinator’s 2018 batches that have a website, 69% use a .com and 7% a .io.

69%
on .com, 2017: 74%
7%
on .io, 2017: 7%
1 in 10
startups off .com find the .com of their name for sale

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Which extensions the 2018 startups use

  1. .com69%
  2. .io7%
  3. .co7%
  4. .ai5%
  5. .org3%
  6. .bio2%
  7. 16 more extensions8%

Batch by batch

Winter 2018139.com68%.io9%
Summer 2018120.com70%.io5%

Is the .com of a 2018 YC startup’s name for sale?

80 of the 2018 startups are not on a .com. For 8 of them (1 in 10), the .com of their name is for sale. 72 are registered with no sale listing; some are the startup’s own redirect.

  1. For sale10%
  2. Registered, no sale listing90%

Own the .com of a startup’s name? See what it’s worth →

Source: Y Combinator’s company directory and the .com zone file, 1 November 2026.