You asked about Data Engineering
49 people built something like it. 10 are gone.
That is 25% of the ones whose fate we could settle, against 23% across the whole register. 9 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | API for developers and AIs to access health data · tryterra.co | still up |
| 2019-06-01 | YCRutter The Unified API for Business Financial Data · rutter.com | still up |
| 2019-01-01 | YCBasilica Basilica is an API that embeds high-dimensional data like images and… · basilica.ai | gone |
| 2025-01-01 | YCReJot We turn complex API integrations into drop‑in full‑stack libraries · rejot.dev | still up |
| 2014-01-01 | YCAlgolia A developer-friendly and enterprise-grade search API. · algolia.com | still up |
| 2022-01-10 | databar.ai | still up |
| 2022-04-27 | directus.io | moved |
| 2022-10-12 | rye.com | still up |
| 2022-02-02 | climatiq.io | still up |
| 2022-05-17 | rarify.tech | unverified |
| 2021-07-10 | styvio.com | gone |
| 2017-06-01 | Health enterprise API for data on doctors, insurance, costs, & quality · ribbonhealth.com | acquired |
| 2021-06-01 | YCAnakin One API to get clean data from any website for your AI agents at scale · anakin.io | still up |
| 2020-06-01 | YCDecentro API Platform for Banking Integrations (Plaid for India and APAC) · decentro.tech | still up |
| 2021-01-01 | YCMindee AI Document Understanding API · mindee.com | still up |
| 2022-02-03 | tweetfeast.com | unverified |
| 2011-01-01 | YCMailgun Email API service. · mailgun.net | acquired |
| 2020-01-01 | The API to get recordings, transcripts, and metadata from meetings · recall.ai | still up |
| 2023-01-01 | YCFern Instantly offer SDKs and API Docs · buildwithfern.com | acquired |
| 2023-06-27 | capeprivacy.com | moved |
| 2022-04-08 | columns.ai | still up |
| 2020-06-01 | YCSeam API for IoT Devices · seam.co | still up |
| 2022-01-01 | YCTheneo Stripe-like API Docs in just a few clicks · theneo.io | still up |
| 2021-09-20 | oikolab.com | still up |
| 2023-03-07 | yobulk.dev | gone |
| 2023-03-30 | meteosource.com | still up |
| 2020-01-01 | YCJunction API for at-home health data · junction.com | still up |
| 2022-06-01 | YCInvofox Invofox is the document parsing and data extraction API for software… · invofox.com | still up |
| 2023-09-01 | ragapi.com | unverified |
| 2014-01-01 | YCWit.ai Natural Language for Developers --Wit is an API that makes it easy… · wit.ai | acquired |
| 2020-01-01 | YCWeav Weav is the universal API for commerce platforms · weav.co | acquired |
| 2022-06-01 | The Unified API for Business Financial Data · integrationlabs.co | gone |
| 2022-06-28 | hasura.io | still up |
| 2019-01-01 | YCFuse Unified API for financial data aggregators. · letsfuse.com | gone |
| 2021-01-31 | japan-api.github.io | unverified |
| 2022-11-30 | basement.dev | unverified |
| 2022-01-23 | databar.ai | still up |
| 2023-01-01 | YCNango A single API for all your integrations · nango.dev | still up |
| 2025-09-01 | YCs2.dev API for unlimited, durable, real-time streams · s2.dev | still up |
| 2020-01-01 | YCQuill Fullstack API and management platform for dashboards and reporting · quill.co | still up |
| 2022-10-16 | codehooks.io | still up |
| 2023-06-06 | tryabide.co | gone |
| 2020-01-01 | YCEnveloop Design and send messages from your app with a simple API. · enveloop.com | gone |
| 2025-09-01 | YCParse Build an API to interact with any website. · parse.bot | still up |
| 2024-01-01 | API For PDF Document Workflows · fileforge.com | gone |
| 2023-06-01 | The API for LLM tool use · opentools.com | still up |
| 2022-01-01 | API for shared embeddable web browsers · hyperbeam.com | still up |
| 2019-06-01 | Turn any website into an API · dashblock.com | gone |
| 2017-01-01 | The Universal API · scaphold.io | acquired |
| 2018-01-01 | YCNewCraft Universal API for HR & Payroll · newcraft.io | acquired |
| 2018-06-01 | YCOneGraph GraphQL API to connect all of the internet's APIs. Join us at Netlify! · onegraph.com | acquired |
| 2019-06-01 | YCBouncer SDK for scanning and verifying credit cards and photo IDs in mobile… · getbouncer.com | acquired |
| 2022-01-01 | Open-source API & UI test automation · karatelabs.io | still up |
| 2025-09-01 | API for parsing multimodal unstructured data · unsiloed.ai | still up |
| 2024-06-01 | YCPinnacle API & SDK for RCS (the next-generation of texting) · pinnacle.sh | still up |
| 2022-01-01 | YCSendo The best SMS/RCS API for startups · sendo.dev | gone |
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.