You asked about Databases
24 people built something like it. 3 are gone.
That is 17% of the ones whose fate we could settle, against 23% across the whole register. 6 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2009-06-01 | YCMixpanel Mixpanel is event analytics for builders that need answers. · mixpanel.com | still up |
| 2013-01-01 | The platform for building and operating time series applications. · influxdata.com | still up |
| 2020-06-01 | YCSupabase Build in a weekend. Scale to millions. · supabase.com | still up |
| 2011-06-01 | YCCompose We make it easy to run databases.
PostgreSQL, Redis, MongoDB,… · mongohq.com | acquired |
| 2011-06-01 | Real-time. Big data. PostgreSQL · citusdata.com | acquired |
| 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 |
| 2023-06-01 | YCParadeDB Unify application data, vectors, and full-text search in one Postgres · paradedb.com | still up |
| 2023-06-01 | Metadata for GenAI workflows · deasylabs.com | acquired |
| 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 |
| 2021-01-01 | YCTriplit The best database for app developers · triplit.dev | gone |
| 2024-01-01 | YCLantern Postgres vector database extension to build AI applications · lantern.dev | gone |
| 2023-06-01 | YCEpsilla All-in-one platform to create AI agents with your private knowledge · epsilla.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 |
| 2020-06-01 | YCKeyDB The only database you'll ever need · keydb.dev | acquired |
| 2026-06-01 | APIs for robotics data teams to verify data quality for model training · hebbianrobotics.com | still up |
| 2023-06-01 | YCPeerDB Fast, native ETL for Postgres 🐘 🚀 · peerdb.io | acquired |
| 2022-01-01 | YCJumpWire Dynamic access controls for all data and databases · jumpwire.io | acquired |
| 2023-06-01 | Embed charts, dashboards and exports in your app · datashare.co | still up |
| 2021-06-01 | Analytics for builders. Record and query billions of datapoints with… · scratchdata.com | gone |
How this compares
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.