Stats
Y Combinator · Winter 2017, Summer 2017 · 1 November 2026

What domains do YC’s 2017 startups use?

Of the 220 startups in Y Combinator’s 2017 batches that have a website, 74% use a .com and 7% a .io.

74%
on .com, 2016: 80%
7%
on .io, 2016: 6%
1 in 19
startups off .com find the .com of their name for sale

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Which extensions the 2017 startups use

  1. .com74%
  2. .io7%
  3. .ai5%
  4. .co2%
  5. .org2%
  6. .inunder 1%
  7. 17 more extensions8%

Batch by batch

Winter 2017107.com76%.io7%
Summer 2017113.com73%.io8%

Is the .com of a 2017 YC startup’s name for sale?

57 of the 2017 startups are not on a .com. For 3 of them (1 in 19), the .com of their name is for sale. 53 are registered with no sale listing; some are the startup’s own redirect. 1 is unregistered.

  1. For sale5%
  2. Registered, no sale listing93%
  3. Unregistered2%

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