Y Combinator Startups

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

140 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

P25 · 140 sites · ← all sites

140 sites, including 4 parked or gone · show only live sites

#URLThis weekAvg rankTrancoRadarCrUXMajesticUmbrellaChecked

1

better-auth.com279,868 avg · P25▼ 2,218279,868207,909top 200ktop 1M128,995502,699Sep 14

Tranco 207,909Radar top 200kCrUX top 1MMajestic 128,995Umbrella 502,699checked Sep 14

2

willowvoice.com296,997 avg · P25▲ 41,720296,99791,817top 50k—294,581504,592Sep 14

Tranco 91,817Radar top 50kCrUX —Majestic 294,581Umbrella 504,592checked Sep 14

3

humanbehavior.co297,112 avg · P25▲ 77,230297,112297,112top 100k———Sep 14

Tranco 297,112Radar top 100kCrUX —Majestic —Umbrella —checked Sep 14

4

pgdog.dev376,811 avg · P25▲ 6,440376,811———376,811—Sep 14

Tranco —Radar —CrUX —Majestic 376,811Umbrella —checked Sep 14

5

sim.ai413,713 avg · P25▲ 18,142413,713—top 1M—413,713—Sep 14

Tranco —Radar top 1MCrUX —Majestic 413,713Umbrella —checked Sep 14

6

cua.ai474,466 avg · P25▲ 19,225474,466511,373top 500k—437,558—Sep 14

Tranco 511,373Radar top 500kCrUX —Majestic 437,558Umbrella —checked Sep 14

7

usefeyn.com557,167 avg · P25▲ 82,156557,167———557,167—Sep 14

Tranco —Radar —CrUX —Majestic 557,167Umbrella —checked Sep 14

8

tinfoil.sh562,077 avg · P25▲ 16,912562,077291,633top 100k—680,084714,513Sep 14

Tranco 291,633Radar top 100kCrUX —Majestic 680,084Umbrella 714,513checked Sep 14

9

probo.com600,133 avg · P25▼ 11,250600,133———600,133—Sep 14

Tranco —Radar —CrUX —Majestic 600,133Umbrella —checked Sep 14

10

voiceos.com673,021 avg · P25▲ 67,085673,021673,021top 500k———Sep 14

Tranco 673,021Radar top 500kCrUX —Majestic —Umbrella —checked Sep 14

11

cubic.dev678,285 avg · P25▲ 52,871678,285707,425top 500k—649,145—Sep 14

Tranco 707,425Radar top 500kCrUX —Majestic 649,145Umbrella —checked Sep 14

12

klavis.ai758,971 avg · P25▲ 17,402758,971—top 500k—758,971—Sep 14

Tranco —Radar top 500kCrUX —Majestic 758,971Umbrella —checked Sep 14

13

blaxel.ai778,076 avg · P25▼ 35,522778,076903,654top 1M—652,498—Sep 14

Tranco 903,654Radar top 1MCrUX —Majestic 652,498Umbrella —checked Sep 14

14

morphik.ai843,514 avg · P25▲ 79,549843,514———843,514—Sep 14

Tranco —Radar —CrUX —Majestic 843,514Umbrella —checked Sep 14

15

bitboard.work969,900 avg · P25▲ 22,729969,900———969,900—Sep 12

Tranco —Radar —CrUX —Majestic 969,900Umbrella —checked Sep 12

16

acolite.ai— avg · P25———————

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

17

adentris.com— avg · P25———————

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

18

aegishealth.us— avg · P25———————

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

19

airweave.ai— avg · P25———————

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

20

alkali.engineering— avg · P25———————

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

21

almond.bot— avg · P25———————

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

22

alpharesearch.nyc— avg · P25———————

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

23

aravolta.com— avg · P25———————

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

24

atlog.ai— avg · P25———————

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

25

attunehq.com— avg · P25———————

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

26

atum.works— avg · P25———————

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

27

avallon.ai— avg · P25———————

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

28

aviro.ai— avg · P25———————

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

29

besimple.ai— avg · P25———————

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

30

bitpatrol.io— avg · P25, acquired———————

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

31

bloom.diy— avg · P25——top 1M———Aug 23

Tranco —Radar top 1MCrUX —Majestic —Umbrella —checked Aug 23

32

blueshoe.com— avg · P25———————

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

33

bondapp.io— avg · P25———————

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

34

boostrobotics.ai— avg · P25———————

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

35

bramantebio.com— avg · P25———————

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

36

capacitive.ai— avg · P25———————

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

37

cartpole.com— avg · P25———————

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

38

cascadespace.com— avg · P25———————

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

39

casco.com— avg · P25———————

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

40

chestnutmortgage.com— avg · P25———————

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

41

chrt.com— avg · P25———————

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

42

claimhealth.com— avg · P25———————

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

43

clarm.com— avg · P25———————

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

44

clidey.com— avg · P25———————

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

45

codefour.us— avg · P25———————

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

46

combinely.ai— avg · P25———————

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

47

cotool.ai— avg · P25———————

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

48

crimson.law— avg · P25———————

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

49

docketqa.com— avg · P25———————

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

50

eloquentai.co— avg · P25———————

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

51

flotthq.com— avg · P25———————

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

52

foundation-industries.com— avg · P25———————

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

53

freesolo.co— avg · P25———————

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

54

frekil.com— avg · P25———————

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

55

galenai.comgone— avg · P25, acquired———————

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

this domain is gone; the rank is what it left behind — the homepage returns 404

56

getanana.com— avg · P25———————

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

57

getauctor.com— avg · P25——top 1M———Sep 14

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

58

getbluejay.ai— avg · P25———————

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

59

getcohesiveai.com— avg · P25———————

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

60

getden.io— avg · P25———————

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

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.