You asked about Open Source
44 people built something like it. 3 are gone.
That is 8% of the ones whose fate we could settle, against 23% across the whole register. 7 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | Open source feature flagging and A/B testing · growthbook.io | still up |
| 2022-01-01 | YCBotCity Observability and Governance for AI-Generated Python scripts. · botcity.dev | still up |
| 2022-01-01 | YCLanceDB Open-source, serverless vectordb for production-scale generative AI · lancedb.com | still up |
| 2022-06-01 | YCMedplum API first electronic health record (EHR) that is open source · medplum.com | still up |
| 2022-01-01 | Open-Source Postman alternative · requestly.com | acquired |
| 2022-01-01 | Open-source data observability for data teams · elementary-data.com | still up |
| 2022-06-01 | YCLamin Open data platform for traceable, multimodal AI · lamin.ai | still up |
| 2022-06-01 | Open-source, AI-first and no-code business automation tool · activepieces.com | still up |
| 2022-01-01 | YCConvoy Webhooks Gateway for outgoing and incoming webhooks. · getconvoy.io | still up |
| 2022-06-01 | YCWindmill Open-source platform to turn scripts into internal apps & workflows · windmill.dev | still up |
| 2022-01-01 | YCNetmaker Automated WireGuard networks for distributed systems and Kubernetes · netmaker.io | still up |
| 2022-01-01 | YCRownd Fully autonomous defense solutions for the global edge. · rownd.ai | still up |
| 2022-01-01 | YCHydra Serverless Analytics on Postgres · hydra.so | acquired |
| 2022-01-01 | YCBeam AI-Native Cloud Platform · beam.cloud | still up |
| 2022-06-01 | YCHyperDX Open-source, dev-friendly observability. · hyperdx.io | acquired |
| 2022-06-01 | YCStackup Stackup helps businesses manage their crypto assets. · stackup.fi | still up |
| 2022-06-01 | Building the definitive all-in-one on-device AI productivity tool · anythingllm.com | still up |
| 2022-01-01 | We make Orca, MIT open source terminal-based agent orchestrator · onorca.dev | still up |
| 2022-01-01 | Open source software that cleans and transforms messy healthcare data. · tuvahealth.com | still up |
| 2022-06-01 | YCGrai Open source version control for metadata · grai.io | gone |
| 2022-06-01 | YCNeosync Neosync is an open-source anonymization and synthetic data platform. · neosync.dev | acquired |
| 2022-06-01 | YCPayload Developer-First Headless CMS and Application Framework · payloadcms.com | acquired |
| 2022-06-01 | The API to search, scrape, and interact with the web at scale. 🔥 · firecrawl.dev | still up |
| 2022-01-01 | YCFirezone Easiest way to set up Zero Trust Access for your team · firezone.dev | still up |
| 2022-06-01 | YCMistle Open source background agents · mistle.dev | still up |
| 2022-06-01 | YCLotus Open-Core Pricing and Billing Engine · uselotus.io | gone |
| 2022-01-01 | Open-source API & UI test automation · karatelabs.io | still up |
| 2022-06-01 | Open-source customer engagement & messaging automation · dittofeed.com | still up |
| 2022-01-01 | YCHumand All-in-one app for internal communication and HR · humand.co | still up |
| 2022-06-01 | YCCompUp Building a compensation graph to help companies optimise people spend · compup.io | still up |
| 2022-06-01 | AI talent platform to hire, manage, and grow your people · peoplebox.ai | still up |
| 2022-01-01 | AI solution that streamlines candidate screening and recruitment · talentropy.ai | still up |
| 2022-06-01 | Engineering the future of chemistry for natural resource extraction · maverickx.com | still up |
| 2022-01-01 | YCQuan End-to-end platform to improve wellbeing and team performance. · quanwellbeing.com | acquired |
| 2022-01-01 | Org design and workforce planning platform to drive org transformation · agentnoon.com | still up |
| 2022-01-01 | YCStafBook Rippling for Southeast Asia · stafbook.com | still up |
| 2022-01-01 | YCHappl Your personalised benefits and engagement platform for global teams · happl.com | still up |
| 2022-01-01 | YCUnsaddl education benefits and leave of absence management · unsaddl.com | acquired |
| 2022-06-01 | YCDisclo Health disclosure and accommodation management platform · disclo.com | still up |
| 2022-01-01 | YCPeakPath Smartwatch powered coaching to improve teams sustainable performance · peakpath.com | gone |
| 2022-01-01 | YCBobidi Restaurant Loyalty Using Quiz · upswell.ai | still up |
| 2022-01-01 | YCComplete The complete way to do compensation · complete.so | still up |
| 2022-06-01 | Operating system for HR in the AI era · aragorn.ai | still up |
| 2022-01-01 | YCTop Road Payments & analytics for apps in the OpenAI GPT Store · toproad.ai | still up |
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.