Y Combinator Startups

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

211 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

W23 · 211 sites · ← all sites

211 live · 25 parked or gone — show all

#URLThis weekAvg rankTrancoRadarCrUXMajesticUmbrellaChecked

vector.co56,967 avg · W23▲ 1,39656,96732,443top 20k——81,490Sep 14

Tranco 32,443Radar top 20kCrUX —Majestic —Umbrella 81,490checked Sep 14

litellm.ai69,356 avg · W23▲ 2,82369,356106,773top 500ktop 1M31,938—Sep 14

Tranco 106,773Radar top 500kCrUX top 1MMajestic 31,938Umbrella —checked Sep 14

resend.com94,633 avg · W23▼ 34,78994,63317,579top 20ktop 50k8,762257,557Sep 14

Tranco 17,579Radar top 20kCrUX top 50kMajestic 8,762Umbrella 257,557checked Sep 14

usepylon.com95,098 avg · W23▲ 4,88195,09817,922top 10k—167,87599,497Sep 14

Tranco 17,922Radar top 10kCrUX —Majestic 167,875Umbrella 99,497checked Sep 14

onetext.com111,754 avg · W23▼ 2,801111,754103,114top 100k——120,393Sep 14

Tranco 103,114Radar top 100kCrUX —Majestic —Umbrella 120,393checked Sep 14

wallbit.io123,421 avg · W23▲ 106123,421123,421————Sep 14

Tranco 123,421Radar —CrUX —Majestic —Umbrella —checked Sep 14

trigger.dev158,942 avg · W23▲ 5,656158,942160,430top 100k—157,454—Sep 14

Tranco 160,430Radar top 100kCrUX —Majestic 157,454Umbrella —checked Sep 14

langfuse.com160,263 avg · W23, acquired▲ 21,701160,26340,917top 50ktop 1M38,282401,589Sep 14

Tranco 40,917Radar top 50kCrUX top 1MMajestic 38,282Umbrella 401,589checked Sep 14

helicone.ai183,064 avg · W23, acquired▲ 4,986183,064275,062top 500k—91,065—Sep 14

Tranco 275,062Radar top 500kCrUX —Majestic 91,065Umbrella —checked Sep 14

superkalam.com191,613 avg · W23▲ 9,544191,613191,613top 1Mtop 100k——Sep 14

Tranco 191,613Radar top 1MCrUX top 100kMajestic —Umbrella —checked Sep 14

stackai.com202,316 avg · W23, acquired▲ 1,579202,316264,037top 500ktop 1M140,594—Sep 14

Tranco 264,037Radar top 500kCrUX top 1MMajestic 140,594Umbrella —checked Sep 14

type.ai217,069 avg · W23▲ 1,772217,069250,788top 1Mtop 500k183,350—Sep 14

Tranco 250,788Radar top 1MCrUX top 500kMajestic 183,350Umbrella —checked Sep 14

middleware.io220,354 avg · W23▲ 7,737220,354165,942top 100k—123,364371,755Sep 14

Tranco 165,942Radar top 100kCrUX —Majestic 123,364Umbrella 371,755checked Sep 14

yuma.ai228,828 avg · W23▼ 4,224228,82878,599top 50k—344,314263,571Sep 14

Tranco 78,599Radar top 50kCrUX —Majestic 344,314Umbrella 263,571checked Sep 14

buildwithfern.com238,093 avg · W23, acquired▲ 44,110238,093178,570top 100k—259,564276,144Sep 14

Tranco 178,570Radar top 100kCrUX —Majestic 259,564Umbrella 276,144checked Sep 14

reflex.dev254,298 avg · W23▲ 4,188254,298371,642top 500k—136,953—Sep 14

Tranco 371,642Radar top 500kCrUX —Majestic 136,953Umbrella —checked Sep 14

magicpatterns.com265,923 avg · W23▲ 8,138265,923339,368top 500ktop 1M192,477—Sep 14

Tranco 339,368Radar top 500kCrUX top 1MMajestic 192,477Umbrella —checked Sep 14

glass.health277,805 avg · W23▲ 5,610277,805———277,805—Sep 14

Tranco —Radar —CrUX —Majestic 277,805Umbrella —checked Sep 14

inkeep.com289,228 avg · W23▲ 17,598289,228156,873top 100k—460,600250,211Sep 14

Tranco 156,873Radar top 100kCrUX —Majestic 460,600Umbrella 250,211checked Sep 14

depot.dev294,983 avg · W23▲ 5,557294,983379,421top 500k—210,545—Sep 14

Tranco 379,421Radar top 500kCrUX —Majestic 210,545Umbrella —checked Sep 14

vellum.ai315,161 avg · W23▼ 6,498315,161169,989top 500ktop 1M61,000714,495Sep 14

Tranco 169,989Radar top 500kCrUX top 1MMajestic 61,000Umbrella 714,495checked Sep 14

cloudchipr.com325,328 avg · W23▲ 15,614325,328———325,328—Sep 14

Tranco —Radar —CrUX —Majestic 325,328Umbrella —checked Sep 14

clueso.io325,981 avg · W23▲ 27,872325,981229,824top 200k—422,138—Sep 14

Tranco 229,824Radar top 200kCrUX —Majestic 422,138Umbrella —checked Sep 14

persana.ai331,541 avg · W23, acquired▲ 13,314331,541—top 1M—331,541—Sep 14

Tranco —Radar top 1MCrUX —Majestic 331,541Umbrella —checked Sep 14

nango.dev354,004 avg · W23▲ 22,525354,004491,325top 500k—216,683—Sep 14

Tranco 491,325Radar top 500kCrUX —Majestic 216,683Umbrella —checked Sep 14

hona.com355,024 avg · W23▲ 5,636355,024355,024top 200k———Sep 14

Tranco 355,024Radar top 200kCrUX —Majestic —Umbrella —checked Sep 14

warp.co370,325 avg · W23▲ 33,150370,325—top 1M—370,325—Sep 14

Tranco —Radar top 1MCrUX —Majestic 370,325Umbrella —checked Sep 14

escape.tech375,302 avg · W23▲ 13,952375,302568,161top 1M—182,442—Sep 14

Tranco 568,161Radar top 1MCrUX —Majestic 182,442Umbrella —checked Sep 14

infisical.com375,607 avg · W23▲ 6,209375,60795,432top 50k—82,887948,501Sep 14

Tranco 95,432Radar top 50kCrUX —Majestic 82,887Umbrella 948,501checked Sep 14

cosine.sh381,505 avg · W23▼ 2,685381,505570,855——192,154—Sep 14

Tranco 570,855Radar —CrUX —Majestic 192,154Umbrella —checked Sep 14

numeral.com403,656 avg · W23▼ 5,636403,656320,117top 1M—210,434680,417Sep 14

Tranco 320,117Radar top 1MCrUX —Majestic 210,434Umbrella 680,417checked Sep 14

icepanel.io407,534 avg · W23▲ 13,373407,534407,534top 200k———Sep 14

Tranco 407,534Radar top 200kCrUX —Majestic —Umbrella —checked Sep 14

truewind.ai415,519 avg · W23▲ 25,658415,519———415,519—Sep 14

Tranco —Radar —CrUX —Majestic 415,519Umbrella —checked Sep 14

flower.ai427,908 avg · W23▲ 15,204427,908607,719top 1M—248,097—Sep 14

Tranco 607,719Radar top 1MCrUX —Majestic 248,097Umbrella —checked Sep 14

alaan.com441,015 avg · W23▼ 5,507441,015395,301top 500ktop 1M486,728—Sep 14

Tranco 395,301Radar top 500kCrUX top 1MMajestic 486,728Umbrella —checked Sep 14

extend.ai464,939 avg · W23▼ 16,002464,939669,708top 1M—260,170—Sep 14

Tranco 669,708Radar top 1MCrUX —Majestic 260,170Umbrella —checked Sep 14

traceloop.com478,366 avg · W23, acquired▲ 55,550478,366—top 1M—478,366—Sep 14

Tranco —Radar top 1MCrUX —Majestic 478,366Umbrella —checked Sep 14

highlight.io490,742 avg · W23, acquired▲ 47,008490,742221,889top 100k—478,215772,123Sep 14

Tranco 221,889Radar top 100kCrUX —Majestic 478,215Umbrella 772,123checked Sep 14

avoca.ai499,763 avg · W23▲ 27,624499,763351,081top 200k—648,445—Sep 14

Tranco 351,081Radar top 200kCrUX —Majestic 648,445Umbrella —checked Sep 14

pirros.com534,255 avg · W23▲ 4,532534,255534,255top 500k———Sep 14

Tranco 534,255Radar top 500kCrUX —Majestic —Umbrella —checked Sep 14

vitalize.care541,532 avg · W23▲ 34,378541,532541,532top 1M———Sep 14

Tranco 541,532Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

unify.ai569,316 avg · W23▲ 15,771569,316726,371——412,260—Sep 14

Tranco 726,371Radar —CrUX —Majestic 412,260Umbrella —checked Sep 14

onshore.com582,301 avg · W23▲ 13,048582,301552,330——612,272—Sep 14

Tranco 552,330Radar —CrUX —Majestic 612,272Umbrella —checked Sep 14

frigade.com584,911 avg · W23▼ 16,543584,911264,640top 200k—895,383594,709Sep 14

Tranco 264,640Radar top 200kCrUX —Majestic 895,383Umbrella 594,709checked Sep 14

drdroid.io586,553 avg · W23▲ 26,746586,553———586,553—Sep 14

Tranco —Radar —CrUX —Majestic 586,553Umbrella —checked Sep 14

outerbase.com587,484 avg · W23, acquired▲ 8,958587,484———587,484—Sep 14

Tranco —Radar —CrUX —Majestic 587,484Umbrella —checked Sep 14

tennr.com588,210 avg · W23▲ 78,621588,210345,765top 500k—701,942716,922Sep 14

Tranco 345,765Radar top 500kCrUX —Majestic 701,942Umbrella 716,922checked Sep 14

commonpaper.com592,900 avg · W23▲ 30,146592,900———592,900—Sep 14

Tranco —Radar —CrUX —Majestic 592,900Umbrella —checked Sep 14

boundaryml.com598,773 avg · W23▼ 5,492598,773———598,773—Sep 14

Tranco —Radar —CrUX —Majestic 598,773Umbrella —checked Sep 14

coldreach.ai619,001 avg · W23▲ 496619,001———619,001—Sep 14

Tranco —Radar —CrUX —Majestic 619,001Umbrella —checked Sep 14

rivet.dev637,268 avg · W23▼ 60,872637,268720,346top 500k—554,189—Sep 14

Tranco 720,346Radar top 500kCrUX —Majestic 554,189Umbrella —checked Sep 14

syncly.app676,248 avg · W23▲ 56,855676,248———676,248—Sep 14

Tranco —Radar —CrUX —Majestic 676,248Umbrella —checked Sep 14

credal.ai709,896 avg · W23▲ 3,638709,896—top 1M—709,896—Sep 14

Tranco —Radar top 1MCrUX —Majestic 709,896Umbrella —checked Sep 14

univerbal.app746,335 avg · W23▼ 32,055746,335———746,335—Sep 14

Tranco —Radar —CrUX —Majestic 746,335Umbrella —checked Sep 14

trysalient.com768,159 avg · W23▲ 71,443768,159———768,159—Sep 14

Tranco —Radar —CrUX —Majestic 768,159Umbrella —checked Sep 14

co.dev805,951 avg · W23▼ 34,099805,951———805,951—Sep 14

Tranco —Radar —CrUX —Majestic 805,951Umbrella —checked Sep 14

palomma.com818,496 avg · W23▲ 3,010818,496818,496————Sep 14

Tranco 818,496Radar —CrUX —Majestic —Umbrella —checked Sep 14

metal.ai847,670 avg · W23▲ 13,195847,670———847,670—Sep 14

Tranco —Radar —CrUX —Majestic 847,670Umbrella —checked Sep 14

metal.so861,149 avg · W23▼ 1,757861,149861,149top 500k———Sep 14

Tranco 861,149Radar top 500kCrUX —Majestic —Umbrella —checked Sep 14

alphawatch.ai876,762 avg · W23▲ 110,108876,762———876,762—Sep 14

Tranco —Radar —CrUX —Majestic 876,762Umbrella —checked Sep 14

relace.ai909,732 avg · W23909,732———909,732—Sep 14

Tranco —Radar —CrUX —Majestic 909,732Umbrella —checked Sep 14

speccheckrx.com910,262 avg · W23▲ 49,706910,262910,262top 1M———Sep 14

Tranco 910,262Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

rollstack.com914,591 avg · W23▲ 56,264914,591———914,591—Sep 14

Tranco —Radar —CrUX —Majestic 914,591Umbrella —checked Sep 14

keephq.dev915,509 avg · W23, acquired▲ 13,692915,509———915,509—Sep 14

Tranco —Radar —CrUX —Majestic 915,509Umbrella —checked Sep 14

alloy.app959,736 avg · W23959,736———959,736—Sep 14

Tranco —Radar —CrUX —Majestic 959,736Umbrella —checked Sep 14

suger.io980,790 avg · W23980,790980,790————Sep 4

Tranco 980,790Radar —CrUX —Majestic —Umbrella —checked Sep 4

1stcollab.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

222.place— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

adventris.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

aqueduct.sh— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

ariglad.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

arroyo.dev— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

askkyber.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

atmeto.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

backdropagent.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

bluebirds.ai— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

brewit.ai— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

buildjet.com— avg · W23——top 1M———Sep 14

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

bujeti.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

clearspace.org— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

clickpe.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

combinehealth.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

compliantllm.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

concourse.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

coperniq.io— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

corgilabs.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

dagworks.io— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

dataglade.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

designbase.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

diffuse.bio— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

double.bot— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

edgebit.io— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

epsilon-ai.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

factiq.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

fairwayhealth.co— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

fastgen.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

finic.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

finnihealth.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

finta.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

100

flexdesk.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

101

flexwash.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

102

floworks.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

103

fluidinvesting.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

104

getadri.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

105

getcobblestone.com— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

106

getfinn.us— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

107

gethipposcribe.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

108

getversive.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

109

gooseworks.ai— avg · W23——top 1M———Sep 14

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

110

gosameday.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

111

goveagle.com— avg · W23——top 1M———Sep 13

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 13

112

hadrius.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

113

hammr.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

114

helloconduit.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

115

honeydew.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

116

inbuild.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

117

insurestack.ai— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

118

invitris.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

119

invopop.com— avg · W23——top 1M———Sep 14

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

120

joinloula.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

121

kivohealth.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

122

koywe.com— avg · W23——top 1M———Sep 6

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 6

123

kv.cash— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

124

latenthealth.com— avg · W23——top 1M———Sep 14

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Sep 14

125

lightski.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

126

linkgrep.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

127

linum.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

128

littio.co— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

129

lume.ai— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

130

mantys.io— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

131

matano.dev— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

132

mercoa.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

133

miracleml.com— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

134

modularit.bio— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

135

muffindata.com— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

136

novel.care— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

137

noya.io— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

138

nunu.ai— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

139

odigos.io— avg · W23———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

140

of.one— avg · W23, acquired———————

Tranco —Radar —CrUX —Majestic —Umbrella —checked never

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.