You asked about Databases
24 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2009-06-01 | YCMixpanel Mixpanel is event analytics for builders that need answers. · mixpanel.com | still up |
| 2022-01-26 | tomcritchlow.com | still up |
| 2013-01-01 | The platform for building and operating time series applications. · influxdata.com | still up |
| 2022-02-19 | notion2charts.com | still up |
| 2022-07-13 | benchmark.clickhouse.com | still up |
| 2022-03-09 | cogram.com | still up |
| 2022-06-02 | stateofdb.com | still up |
| 2020-06-01 | YCSupabase Build in a weekend. Scale to millions. · supabase.com | still up |
| 2021-03-27 | stackby.com | still up |
| 2021-08-26 | hippobase.io | still up |
| 2024-01-01 | Real-time and two-way sync between CRMs and Databases · stacksync.com | still up |
| 2024-01-01 | Accelerate Medication Access with AI · runtrellis.com | still up |
| 2023-06-01 | YCArtie Software that streams data from databases to warehouses in real-time · artie.com | still up |
| 2024-01-01 | YCUbicloud Open source alternative to AWS · ubicloud.com | still up |
| 2023-04-04 | osschat.io | still up |
| 2023-06-01 | YCParadeDB Unify application data, vectors, and full-text search in one Postgres · paradedb.com | still up |
| 2023-10-19 | blog.airsequel.com | still up |
| 2025-09-01 | YCs2.dev API for unlimited, durable, real-time streams · s2.dev | still up |
| 2022-06-01 | YCBlitz Lovable for non-tech users: Build no-code internal and customer apps · blitznocode.com | still up |
| 2023-06-01 | YCEpsilla All-in-one platform to create AI agents with your private knowledge · epsilla.com | still up |
| 2026-06-01 | APIs for robotics data teams to verify data quality for model training · hebbianrobotics.com | still up |
| 2025-01-01 | YCReJot We turn complex API integrations into drop‑in full‑stack libraries · rejot.dev | still up |
| 2025-01-01 | YCPraxim The agentic AI Word editor · praxim.ai | still up |
| 2023-06-01 | Embed charts, dashboards and exports in your app · datashare.co | still up |
How this compares
Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
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.