Y Combinator Startups

Startups funded by Y Combinator that have been publicly announced and still have functional websites.

3 of 4,617 sites · synced from the official YC API · rank is the average of Tranco, Majestic and Umbrella; Radar and CrUX shown for context · all 5 are flawed, that's the point. · tap a row for the breakdown

Notes:all

’05–’09S05 · W06 · S06 · W07 · S07 · W08 · S08 · W09 · S09

’10–’14W10 · S10 · W11 · S11 · W12 · S12 · W13 · S13 · W14 · S14

’15–’19W15 · S15 · W16 · S16 · W17 · S17 · W18 · S18 · W19 · S19

’20–’24W20 · S20 · W21 · S21 · W22 · S22 · W23 · S23 · W24 · S24 · F24

’25–’27W25 · S25 · F25 · W26 · S26 · F26 · W27

P25 · P26

S08 · 3 sites · ← all sites

3 live · 2 parked or gone — show all

#URLThis weekAvg rankTrancoRadarCrUXMajesticUmbrellaChecked

posterous.com7,937 avg · S08, acquired▼ 267,93713,025top 1M—2,849—Sep 14

Tranco 13,025Radar top 1MCrUX —Majestic 2,849Umbrella —checked Sep 14

polleverywhere.com108,484 avg · S08▲ 19,344108,48442,440top 100ktop 500k33,853249,160Sep 14

Tranco 42,440Radar top 100kCrUX top 500kMajestic 33,853Umbrella 249,160checked Sep 14

backtype.com561,085 avg · S08, acquired▲ 13,419561,085889,238——232,932—Sep 14

Tranco 889,238Radar —CrUX —Majestic 232,932Umbrella —checked Sep 14

a — means that source hasn't ranked the site; the average uses whichever exact ranks exist

History · every change, public

Sep 14 06:03sync with the YC sync, 9 sites changed

Sep 13 06:03sync with the YC sync, 1 site changed

Sep 12 06:02sync with the YC sync, 6 sites changed

Sep 11 06:03sync with the YC sync, 11 sites changed

Sep 10 06:03sync with the YC sync, 15 sites changed

Sep 9 06:03sync with the YC sync, 13 sites changed

Sep 8 06:03sync with the YC sync, 5 sites shown

This list is kept in step with the official YC API, so it isn't editable here. This is just for fun.