You asked about Recommendation System

43 people built something like it. 12 are gone.

That is 28% of the ones whose fate we could settle, against 23% across the whole register.

Matching
71
Gone
28%
Median life
—
Acquired
0

Matching launches · 60 of 71

checked 5 hours ago · 250 probed today
LaunchedWhat it wasToday
2022-05-26
vertigo.ai
unverified
2022-06-03
webosarchive.com
unverified
2026-09-29
space.bl2.net
unverified
2023-03-14
modernfontstacks.com
still up
2023-06-19
hn-recommend.julienc.me
unverified
2023-12-12
aods.cryingpotato.com
still up
2023-01-19
jamsync.dev
moved
2021-07-17
gorse.io
still up
2021-11-27
mood2movie.com
still up
2023-04-12
librarian-ai.com
still up
2023-08-15
servicer.dev
still up
2021-11-23
tamagui.dev
still up
2022-06-16
lockable.dev
unverified
2023-05-22
wiktok.org
moved
2026-10-19
3anddoneapp.com
unverified
2023-12-08
r3ply.com
still up
2021-02-09
polarsignals.com
still up
2021-07-22
readow.ai
still up
2026-08-24
vanillaos.org
still up
2023-10-06
whattoreadafter.xyz
gone
2023-04-03
pubnix.pink
unverified
2022-11-25
search.rye.com
gone
2022-04-23
reddrecs.com
still up
2021-04-01
cfs.stokeo.com
gone
2022-01-24
nootroflix.com
still up
2021-11-17
filecream.com
unverified
2022-04-20
corise.com
gone
2023-08-17
tripbespoke.com
still up
2023-02-03
getproduct.help
gone
2023-05-16
zacksiri.dev
still up
2021-04-14
storagetarget.com
still up
2021-09-25
nftworlds.com
gone
2022-08-22
jamsync.io
gone
2023-05-11
selecta.ciaran.co.za
still up
2022-05-27
personalfilesystem.org
gone
2023-05-16
heyollie.ai
unverified
2026-09-04
japanmap.fyi
still up
2021-02-20
understandingdistributed.systems
still up
2022-12-21
workat.tech
still up
2022-08-10
juicefs.com
still up
2022-03-16
contentblocksjs.com
unverified
2026-10-06
kahawai.net
unverified
2021-02-17
getoasys.io
unverified
2026-09-27
light-cloud.com
unverified
2026-09-30
setecastronomyinc.com
unverified
2026-09-29
jylus.ai
unverified
2021-08-12
what3books.com
unverified
2023-02-13
wiki.krxiang.com
unverified
2021-09-26
uk.policyengine.org
still up
2022-06-09
getgwak.com
still up
2026-09-21
anchorpoint.app
unverified
2021-03-08
caint.casa
gone
2023-10-11
vectoradmin.com
unverified
2021-03-25
hoppscotch.io
still up
2026-10-08
kahawai.net
unverified
2023-10-12
zama.ai
moved
2023-03-19
dbohdan.sdf.org
unverified
2023-04-20
designducky.ai
gone
2021-07-13
wasi.fyi
gone
2022-03-28
neverinstall.com
still up

How this compares

How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.