Y Combinator Startups

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

40 of 5,025 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

S11 · 40 sites · ← all sites

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

#URLThis weekAvg rankTrancoRadarCrUXMajesticUmbrellaChecked

segment.comredirected4,355 avg · S11, acquired▼ 734,3552,014top 1k—9,5321,520Jul 30

Tranco 2,014Radar top 1kCrUX —Majestic 9,532Umbrella 1,520checked Jul 30

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

onesignal.com4,881 avg · S11▲ 124,881989top 500top 1M11,9701,685Jul 30

Tranco 989Radar top 500CrUX top 1MMajestic 11,970Umbrella 1,685checked Jul 30

vidyard.com7,050 avg · S11▼ 127,0508,108top 10k—5,8667,175Jul 30

Tranco 8,108Radar top 10kCrUX —Majestic 5,866Umbrella 7,175checked Jul 30

genius.com10,928 avg · S11, acquired▲ 31310,928925top 5ktop 1k1,45630,404Jul 30

Tranco 925Radar top 5kCrUX top 1kMajestic 1,456Umbrella 30,404checked Jul 30

sift.com22,864 avg · S11▲ 23322,8647,312top 10k—53,3917,888Jul 30

Tranco 7,312Radar top 10kCrUX —Majestic 53,391Umbrella 7,888checked Jul 30

codecademy.com51,190 avg · S11, acquired▼ 5,49451,1905,504top 20ktop 50k1,743146,324Jul 30

Tranco 5,504Radar top 20kCrUX top 50kMajestic 1,743Umbrella 146,324checked Jul 30

hackerrank.com60,436 avg · S11▼ 9,51760,43613,083top 20ktop 10k6,338161,888Jul 30

Tranco 13,083Radar top 20kCrUX top 10kMajestic 6,338Umbrella 161,888checked Jul 30

gocardless.com90,625 avg · S11▼ 1,85090,62517,253top 50ktop 500k9,244245,379Jul 30

Tranco 17,253Radar top 50kCrUX top 500kMajestic 9,244Umbrella 245,379checked Jul 30

verbling.com116,381 avg · S11, acquired▲ 234116,381148,645top 200ktop 500k84,117—Jul 30

Tranco 148,645Radar top 200kCrUX top 500kMajestic 84,117Umbrella —checked Jul 30

realm.ioredirected116,491 avg · S11, acquired▼ 1,136116,491166,897top 1M—66,084—Jul 30

Tranco 166,897Radar top 1MCrUX —Majestic 66,084Umbrella —checked Jul 30

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

streak.com121,392 avg · S11▼ 1,025121,39259,678top 50ktop 500k46,060258,438Jul 30

Tranco 59,678Radar top 50kCrUX top 500kMajestic 46,060Umbrella 258,438checked Jul 30

imgix.com121,768 avg · S11▼ 1,803121,768174,718top 500ktop 1M68,817—Jul 30

Tranco 174,718Radar top 500kCrUX top 1MMajestic 68,817Umbrella —checked Jul 30

firebase.comredirected126,261 avg · S11, acquired▲ 242126,261105,653top 100k—84,378188,751Jul 30

Tranco 105,653Radar top 100kCrUX —Majestic 84,378Umbrella 188,751checked Jul 30

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

apollographql.com126,400 avg · S11▲ 1,462126,40055,427top 100ktop 1M25,146298,627Jul 30

Tranco 55,427Radar top 100kCrUX top 1MMajestic 25,146Umbrella 298,627checked Jul 30

parse.comredirected126,711 avg · S11, acquired▼ 468126,71141,800top 20k—72,793265,541Jul 30

Tranco 41,800Radar top 20kCrUX —Majestic 72,793Umbrella 265,541checked Jul 30

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

perfectaudience.comgone165,332 avg · S11, acquired▲ 760165,332169,869top 200k—107,916218,211Jul 30

Tranco 169,869Radar top 200kCrUX —Majestic 107,916Umbrella 218,211checked Jul 30

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

citusdata.com190,909 avg · S11, acquired▲ 3,012190,909277,992top 500k—103,825—Jul 30

Tranco 277,992Radar top 500kCrUX —Majestic 103,825Umbrella —checked Jul 30

trycaviar.com314,170 avg · S11, acquired▼ 22,772314,170139,076top 200ktop 500k91,679711,755Jul 30

Tranco 139,076Radar top 200kCrUX top 500kMajestic 91,679Umbrella 711,755checked Jul 30

mixrank.com355,049 avg · S11▲ 23,249355,049305,086top 100k—405,012—Jul 30

Tranco 305,086Radar top 100kCrUX —Majestic 405,012Umbrella —checked Jul 30

automatic.comredirected414,963 avg · S11, acquired▼ 1,133414,963647,526——182,399—Jul 30

Tranco 647,526Radar —CrUX —Majestic 182,399Umbrella —checked Jul 30

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

scienceexchange.com428,244 avg · S11, acquired▲ 1,622428,244604,636top 1M—251,851—Jul 30

Tranco 604,636Radar top 1MCrUX —Majestic 251,851Umbrella —checked Jul 30

clerky.com436,093 avg · S11▲ 8,643436,093543,716——328,470—Jul 30

Tranco 543,716Radar —CrUX —Majestic 328,470Umbrella —checked Jul 30

quartzy.com475,066 avg · S11▼ 11,749475,066308,922top 1M—461,892654,385Jul 30

Tranco 308,922Radar top 1MCrUX —Majestic 461,892Umbrella 654,385checked Jul 30

leadgenius.com598,091 avg · S11▲ 8,390598,091949,082——247,100—Jul 30

Tranco 949,082Radar —CrUX —Majestic 247,100Umbrella —checked Jul 30

zeusliving.comgone740,659 avg · S11, acquired▲ 15,503740,659———740,659—Jul 30

Tranco —Radar —CrUX —Majestic 740,659Umbrella —checked Jul 30

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

mongohq.comgone826,054 avg · S11, acquired▲ 20,291826,054———826,054—Jul 30

Tranco —Radar —CrUX —Majestic 826,054Umbrella —checked Jul 30

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

show 20 more

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

History · every change, public

Jul 30 06:02sync with the YC sync, 15 sites changed

Jul 29 06:03sync with the YC sync, 23 sites changed

Jul 28 06:03sync with the YC sync, 9 sites changed

Jul 27 06:02sync with the YC sync, 7 sites changed

Jul 26 06:03sync with the YC sync, 4 sites changed

Jul 25 06:03sync with the YC sync, 2 sites shown

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