Stats
Y Combinator · Winter 2025, Spring 2025, Summer 2025, Fall 2025 · 1 November 2026

What domains do YC’s 2025 startups use?

Of the 620 startups in Y Combinator’s 2025 batches that have a website, 45% use a .com and 33% a .ai.

45%
on .com, the lowest of any year, 2008 to 2026
33%
on .ai, the highest of any year, 2008 to 2026
1 in 6
startups off .com find the .com of their name for sale

See what the .com of your name is worth before you pick .ai or .io →

Which extensions the 2025 startups use

  1. .com45%
  2. .ai33%
  3. .dev4%
  4. .io4%
  5. .co2%
  6. .so1%
  7. 43 more extensions12%

Batch by batch

Winter 2025166.com48%.ai33%
Spring 2025144.com46%.ai28%
Summer 2025166.com43%.ai38%
Fall 2025144.com42%.ai32%

Is the .com of a 2025 YC startup’s name for sale?

342 of the 2025 startups are not on a .com. For 59 of them (1 in 6), the .com of their name is for sale, and 2 more are parked. 280 are registered with no sale listing; some are the startup’s own redirect. 1 is unregistered.

  1. For sale17%
  2. Parkedunder 1%
  3. Registered, no sale listing82%
  4. Unregisteredunder 1%

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.