Y Combinator Startups

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

40 of 5,218 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 · S27

P25 · P26

S11 · 40 sites · ← all sites

40 sites, including 14 parked or gone · show only live sites

#URLThis weekAvg rankTrancoRadarCrUXMajesticUmbrellaChecked

segment.comredirected4,432 avg · S11, acquired▲ 4924,4322,051top 1k—9,5831,662Oct 29

Tranco 2,051Radar top 1kCrUX —Majestic 9,583Umbrella 1,662checked Oct 29

this domain now redirects elsewhere; the rank measures whoever it points at — the homepage redirects to twilio.com, a different site

onesignal.com4,948 avg · S11▲ 2,2454,9481,039top 500top 1M11,8671,937Oct 29

Tranco 1,039Radar top 500CrUX top 1MMajestic 11,867Umbrella 1,937checked Oct 29

vidyard.com7,362 avg · S11▼ 1127,3627,843top 10k—6,0168,227Oct 29

Tranco 7,843Radar top 10kCrUX —Majestic 6,016Umbrella 8,227checked Oct 29

genius.com10,756 avg · S11, acquired▲ 33010,756941top 5ktop 1k1,63329,695Oct 29

Tranco 941Radar top 5kCrUX top 1kMajestic 1,633Umbrella 29,695checked Oct 29

sift.com21,163 avg · S11▲ 4,54521,1638,091top 10k—46,8348,564Oct 29

Tranco 8,091Radar top 10kCrUX —Majestic 46,834Umbrella 8,564checked Oct 29

hackerrank.com49,717 avg · S11▲ 2,82349,71710,920top 20ktop 10k6,796131,435Oct 29

Tranco 10,920Radar top 20kCrUX top 10kMajestic 6,796Umbrella 131,435checked Oct 29

codecademy.com56,222 avg · S11, acquired▲ 6,56556,2225,930top 20ktop 50k1,932160,805Oct 29

Tranco 5,930Radar top 20kCrUX top 50kMajestic 1,932Umbrella 160,805checked Oct 29

gocardless.com82,202 avg · S11, acquired▲ 5,51182,20219,017top 50ktop 500k9,067218,523Oct 29

Tranco 19,017Radar top 50kCrUX top 500kMajestic 9,067Umbrella 218,523checked Oct 29

realm.ioredirected107,349 avg · S11, acquired▲ 11,154107,349159,804top 1M—54,893—Oct 29

Tranco 159,804Radar top 1MCrUX —Majestic 54,893Umbrella —checked Oct 29

this domain now redirects elsewhere; the rank measures whoever it points at — the homepage redirects to mongodb.com, a different site

imgix.com113,999 avg · S11▲ 3,805113,999171,854top 500ktop 1M56,143—Oct 29

Tranco 171,854Radar top 500kCrUX top 1MMajestic 56,143Umbrella —checked Oct 29

firebase.comredirected115,823 avg · S11, acquired▲ 10,019115,82375,727top 100k—64,895206,847Oct 29

Tranco 75,727Radar top 100kCrUX —Majestic 64,895Umbrella 206,847checked Oct 29

this domain now redirects elsewhere; the rank measures whoever it points at — the homepage redirects to google.com, a different site

streak.com127,869 avg · S11▲ 11,224127,86957,828top 50ktop 500k41,173284,605Oct 29

Tranco 57,828Radar top 50kCrUX top 500kMajestic 41,173Umbrella 284,605checked Oct 29

parse.comredirected131,317 avg · S11, acquired▲ 4,793131,31741,135top 20k—58,875293,941Oct 29

Tranco 41,135Radar top 20kCrUX —Majestic 58,875Umbrella 293,941checked Oct 29

this domain now redirects elsewhere; the rank measures whoever it points at — the homepage redirects to parseplatform.org, a different site

apollographql.com157,685 avg · S11▲ 7,873157,68549,960top 50k—21,398401,698Oct 29

Tranco 49,960Radar top 50kCrUX —Majestic 21,398Umbrella 401,698checked Oct 29

citusdata.com167,221 avg · S11, acquired▲ 14,631167,221257,792top 1M—76,649—Oct 29

Tranco 257,792Radar top 1MCrUX —Majestic 76,649Umbrella —checked Oct 29

perfectaudience.comgone200,420 avg · S11, acquired▲ 8,021200,420182,213top 200k—146,010273,036Oct 29

Tranco 182,213Radar top 200kCrUX —Majestic 146,010Umbrella 273,036checked Oct 29

this domain is gone; the rank is what it left behind — no A or AAAA record

trycaviar.com254,838 avg · S11, acquired▼ 54,911254,83870,315top 50ktop 500k77,183617,015Oct 29

Tranco 70,315Radar top 50kCrUX top 500kMajestic 77,183Umbrella 617,015checked Oct 29

clerky.com292,754 avg · S11, acquired▲ 67,504292,754414,893——170,615—Oct 29

Tranco 414,893Radar —CrUX —Majestic 170,615Umbrella —checked Oct 29

mixrank.com340,884 avg · S11▲ 137,027340,884264,193top 200k—417,575—Oct 29

Tranco 264,193Radar top 200kCrUX —Majestic 417,575Umbrella —checked Oct 29

verbling.com348,466 avg · S11, acquired▲ 82,641348,466153,979top 500ktop 500k86,948804,471Oct 29

Tranco 153,979Radar top 500kCrUX top 500kMajestic 86,948Umbrella 804,471checked Oct 29

show 20 more

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

History · every change, public

Oct 29 06:03sync with the YC sync, 12 sites changed

Oct 28 06:03sync with the YC sync, 10 sites changed

Oct 27 06:03sync with the YC sync, 13 sites changed

Oct 26 06:02sync with the YC sync, 3 sites changed

Oct 25 06:03sync with the YC sync, 5 sites changed

Oct 24 06:03sync with the YC sync, 6 sites changed

Oct 23 06:03sync with the YC sync, 11 sites shown

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