Y Combinator Startups

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

40 of 5,116 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.comredirected4,590 avg · S11, acquired▲ 144,5902,101top 1k—9,6961,972Sep 14

Tranco 2,101Radar top 1kCrUX —Majestic 9,696Umbrella 1,972checked Sep 14

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

onesignal.com4,821 avg · S11▼ 494,8211,013top 500top 1M11,8891,561Sep 14

Tranco 1,013Radar top 500CrUX top 1MMajestic 11,889Umbrella 1,561checked Sep 14

genius.com9,425 avg · S11, acquired▲ 9749,425938top 5ktop 1k1,51825,818Sep 14

Tranco 938Radar top 5kCrUX top 1kMajestic 1,518Umbrella 25,818checked Sep 14

vidyard.com10,099 avg · S11▲ 3110,0997,664top 10k—5,99016,642Sep 14

Tranco 7,664Radar top 10kCrUX —Majestic 5,990Umbrella 16,642checked Sep 14

sift.com22,980 avg · S11▼ 22822,9807,775top 10k—52,2038,962Sep 14

Tranco 7,775Radar top 10kCrUX —Majestic 52,203Umbrella 8,962checked Sep 14

hackerrank.com60,090 avg · S11▲ 1,32860,09010,910top 20ktop 10k6,368162,991Sep 14

Tranco 10,910Radar top 20kCrUX top 10kMajestic 6,368Umbrella 162,991checked Sep 14

codecademy.com76,245 avg · S11, acquired▼ 9,24376,2455,621top 20ktop 50k1,816221,299Sep 14

Tranco 5,621Radar top 20kCrUX top 50kMajestic 1,816Umbrella 221,299checked Sep 14

gocardless.com107,813 avg · S11▼ 5,103107,81313,758top 50ktop 500k8,959300,723Sep 14

Tranco 13,758Radar top 50kCrUX top 500kMajestic 8,959Umbrella 300,723checked Sep 14

imgix.com112,675 avg · S11▲ 1,135112,675164,795top 500ktop 1M60,554—Sep 14

Tranco 164,795Radar top 500kCrUX top 1MMajestic 60,554Umbrella —checked Sep 14

parse.comredirected117,089 avg · S11, acquired▼ 1,713117,08941,122top 20k—70,790239,354Sep 14

Tranco 41,122Radar top 20kCrUX —Majestic 70,790Umbrella 239,354checked Sep 14

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

realm.ioredirected120,369 avg · S11, acquired▼ 2,187120,369177,724top 1M—63,014—Sep 14

Tranco 177,724Radar top 1MCrUX —Majestic 63,014Umbrella —checked Sep 14

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

firebase.comredirected142,093 avg · S11, acquired▲ 1,479142,09395,500top 100k—73,204257,574Sep 14

Tranco 95,500Radar top 100kCrUX —Majestic 73,204Umbrella 257,574checked Sep 14

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

streak.com173,938 avg · S11▼ 12,202173,93858,674top 50ktop 500k45,470417,669Sep 14

Tranco 58,674Radar top 50kCrUX top 500kMajestic 45,470Umbrella 417,669checked Sep 14

citusdata.com185,168 avg · S11, acquired▼ 869185,168279,970top 1M—90,366—Sep 14

Tranco 279,970Radar top 1MCrUX —Majestic 90,366Umbrella —checked Sep 14

apollographql.com187,914 avg · S11▲ 16,132187,91449,810top 100k—23,816490,117Sep 14

Tranco 49,810Radar top 100kCrUX —Majestic 23,816Umbrella 490,117checked Sep 14

trycaviar.com227,833 avg · S11, acquired▼ 31,652227,833126,245top 100ktop 500k83,270473,984Sep 14

Tranco 126,245Radar top 100kCrUX top 500kMajestic 83,270Umbrella 473,984checked Sep 14

perfectaudience.comgone233,321 avg · S11, acquired▲ 13,465233,321174,547top 200k—99,673425,742Sep 14

Tranco 174,547Radar top 200kCrUX —Majestic 99,673Umbrella 425,742checked Sep 14

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

mixrank.com310,536 avg · S11▲ 3,052310,536229,712top 200k—391,359—Sep 14

Tranco 229,712Radar top 200kCrUX —Majestic 391,359Umbrella —checked Sep 14

clerky.com337,768 avg · S11▲ 21,316337,768458,173——217,363—Sep 14

Tranco 458,173Radar —CrUX —Majestic 217,363Umbrella —checked Sep 14

verbling.com364,327 avg · S11, acquired▲ 31,276364,327171,932top 500ktop 500k84,577836,471Sep 14

Tranco 171,932Radar top 500kCrUX top 500kMajestic 84,577Umbrella 836,471checked Sep 14

show 20 more

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.