You asked about Developer Tools
59 people built something like it. 11 are gone.
That is 23% of the ones whose fate we could settle, against 23% across the whole register. 11 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | YCMintlify The intelligent knowledge platform · mintlify.com | still up |
| 2022-01-01 | Bluetooth to Space · hubble.com | still up |
| 2022-06-01 | YCTailor Headless ERP for retail operations · tailor.tech | still up |
| 2022-01-01 | Open source feature flagging and A/B testing · growthbook.io | still up |
| 2022-01-01 | YCUnlayer AI-powered content creation infrastructure for apps · unlayer.com | still up |
| 2022-01-01 | YCBotCity Observability and Governance for AI-Generated Python scripts. · botcity.dev | still up |
| 2022-01-01 | YCSieve The multimodal data lab · sievedata.com | still up |
| 2022-01-01 | YCTheneo Stripe-like API Docs in just a few clicks · theneo.io | still up |
| 2022-06-01 | YCAxle AI-native clearinghouse for insurance · axle.insure | 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 | Plaid for trading · snaptrade.com | still up |
| 2022-06-01 | YCIntuned Code-first scrapers and RPAs — built and maintained by AI · intunedhq.com | still up |
| 2022-01-01 | YCVelt SDK for adding an agent and human governance layer to your product · velt.dev | still up |
| 2022-01-01 | Open-source data observability for data teams · elementary-data.com | still up |
| 2022-01-01 | YCSpeechly Natural Language Understanding API for Speech that runs on device · speechly.com | acquired |
| 2022-06-01 | Programming courses for experienced engineers · codecrafters.io | still up |
| 2022-01-01 | YCPoko Seamless Fiat Payments for Web3 · pokoapp.xyz | still up |
| 2022-06-01 | YCLamin Open data platform for traceable, multimodal AI · lamin.ai | still up |
| 2022-01-01 | YCVimmerse Bring your photos to life with Vimmerse · vimmerse.net | still up |
| 2022-01-01 | Visually design and manage cloud infrastructures. · brainboard.co | 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 | Artificially Intelligent Corporations · mutable.ai | acquired |
| 2022-01-01 | YCPloomber Heroku for AI · ploomber.io | gone |
| 2022-01-01 | YCDecent Cross-chain routing + trading APIs. One-click transactions with any… · decent.xyz | acquired |
| 2022-01-01 | No-Code LLM Application / Workflow Builder · queryvary.com | still up |
| 2022-06-01 | YCTaro Help high-growth tech companies hire strong engineers · jointaro.com | acquired |
| 2022-01-01 | YCHydra Serverless Analytics on Postgres · hydra.so | acquired |
| 2022-01-01 | YCBeam AI-Native Cloud Platform · beam.cloud | still up |
| 2022-01-01 | Team-based authentication for B2B SaaS · propelauth.com | still up |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2022-01-01 | YCVessel Developer-first, native integration platform for GTM tools · vessel.dev | gone |
| 2022-06-01 | API for Retrieval Augmented Generation · superpowered.ai | gone |
| 2022-06-01 | The IAM Policy Copilot · slauth.io | gone |
| 2022-06-01 | YCStackup Stackup helps businesses manage their crypto assets. · stackup.fi | still up |
| 2022-06-01 | YCInstant The best backend for AI-coded apps · instantdb.com | still up |
| 2022-01-01 | Deploy secure, scalable cloud infrastructure in minutes not days · massdriver.cloud | still up |
| 2022-01-01 | We make Orca, MIT open source terminal-based agent orchestrator · onorca.dev | still up |
| 2022-06-01 | YCVizzly Customer-Facing Analytics for Modern SaaS. · vizzly.co | acquired |
| 2022-06-01 | YCHyperDX Open-source, dev-friendly observability. · hyperdx.io | acquired |
| 2022-01-01 | YCBunkyr Zero-Knowledge security without seed phrases or backup codes · bunkyr.com | still up |
| 2022-06-01 | The API to search, scrape, and interact with the web at scale. 🔥 · firecrawl.dev | still up |
| 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 | YCGrai Open source version control for metadata · grai.io | gone |
| 2022-01-01 | API for shared embeddable web browsers · hyperbeam.com | still up |
| 2022-06-01 | YCSunpia Deploy serverless without rewriting code · sunpia.io | still up |
| 2022-01-01 | Bioinformatics pipelines in the cloud · flowdeploy.com | gone |
| 2022-06-01 | Automated infrastructure compliance and documentation · pluralith.com | still up |
| 2022-06-01 | Confidently ship analytics code faster with fewer errors · ilumadata.io | gone |
| 2022-01-01 | An easier way to deploy and manage cloud apps · nullstone.io | still up |
| 2022-06-01 | YCBricksAI Streamlining LLM application management for enterprises · trybricks.ai | gone |
| 2022-01-01 | Open-source API & UI test automation · karatelabs.io | still up |
| 2022-01-01 | YCT3 Chat The best AI chat you've ever used · t3.chat | still up |
| 2022-06-01 | Faster processors for solving NP-complete problems · integrated-reasoning.com | still up |
| 2022-01-01 | YCSendo The best SMS/RCS API for startups · sendo.dev | gone |
| 2022-01-01 | Multi-chain token data platform · simplehash.com | acquired |
| 2022-01-01 | YCKable Usage-based billing for API companies · kable.io | 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.