You asked about Developer Tools
107 people built something like it. 22 are gone.
That is 24% of the ones whose fate we could settle, against 23% across the whole register. 15 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-12-22 | heynote.com | still up |
| 2023-02-01 | trigger.dev | still up |
| 2023-02-21 | phind.com | unverified |
| 2023-01-24 | infisical.com | still up |
| 2023-06-20 | inngest.com | still up |
| 2023-03-04 | talentsignals.com | gone |
| 2023-11-01 | anchor.dev | unverified |
| 2023-03-28 | airwalker.io | gone |
| 2023-12-07 | recompyle.com | gone |
| 2023-01-01 | Security infrastructure for developers and agents · infisical.com | still up |
| 2023-01-01 | YCResend Email for developers · resend.com | still up |
| 2023-06-21 | germantechjobs.de | moved |
| 2023-03-13 | builtwithdjango.com | still up |
| 2023-09-15 | sqlfordevs.com | still up |
| 2023-01-01 | YCFern Instantly offer SDKs and API Docs · buildwithfern.com | acquired |
| 2023-01-01 | YCEscape Offensive security for the teams that are 100x outnumbered · escape.tech | still up |
| 2023-01-01 | The #1 Actionable FinOps Platform · cloudchipr.com | still up |
| 2023-01-01 | YCExtend Production-ready document processing · extend.ai | still up |
| 2023-01-01 | YCDepot Software delivery built for machine scale. · depot.dev | still up |
| 2023-11-07 | kapeta.com | unverified |
| 2023-07-05 | swissdevjobs.ch | moved |
| 2023-06-01 | YCTiptap The open-source document editor for humans and AI agents. · tiptap.dev | still up |
| 2023-01-01 | YCLangfuse Open source LLM engineering platform · langfuse.com | acquired |
| 2023-01-01 | YCInkeep Build AI Agent teammates and automations in code or no-code · inkeep.com | still up |
| 2023-06-01 | YCTerminal Plaid for Telematics Data in Commercial Trucking · withterminal.com | still up |
| 2023-09-07 | frctnl.xyz | moved |
| 2023-06-01 | YCArtie Software that streams data from databases to warehouses in real-time · artie.com | still up |
| 2023-01-01 | Build your control plane to deploy your product in your customer VPC… · omnistrate.com | still up |
| 2023-06-01 | predibase.com | unverified |
| 2023-09-26 | cssbattle.dev | still up |
| 2023-06-30 | app.e2b.dev | still up |
| 2023-04-11 | onboardbase.com | moved |
| 2023-01-01 | YCInfinia Move money programmatically - built for developers · infiniaweb.com | still up |
| 2023-01-01 | YCCosine Fully Agentic SWE · cosine.sh | still up |
| 2023-11-02 | brian.dev | still up |
| 2023-06-01 | YCParadeDB You should just use Postgres. · paradedb.com | still up |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2023-01-01 | YCLiteLLM Call every LLM API like it's OpenAI [100+ LLMs] · litellm.ai | still up |
| 2023-06-01 | YCrefine Open-source Retool for enterprise · refine.dev | still up |
| 2023-06-01 | YCAtla The improvement engine for AI agents · atla-ai.com | gone |
| 2023-01-01 | YCReflex The operating system for building mission-critical enterprise apps. · reflex.dev | still up |
| 2023-01-01 | YCBoundary The programming language for AI · boundaryml.com | still up |
| 2023-10-12 | dashcam.io | moved |
| 2023-01-01 | YCIcePanel Design and explain complex software architecture. · icepanel.io | still up |
| 2023-01-01 | Know what your LLM is doing — and why it’s failing · traceloop.com | acquired |
| 2023-01-01 | Build and deploy fully‑managed AI agents and workflows · trigger.dev | still up |
| 2023-10-05 | news.aiapipro.com | gone |
| 2023-02-03 | tools.9revolution9.com | gone |
| 2023-01-01 | The open source, fullstack monitoring platform: stop guessing why… · highlight.io | acquired |
| 2023-06-01 | YCTempo Visual Editor for React, powered by AI · tempo.new | still up |
| 2023-06-08 | message-silo.dev | still up |
| 2023-01-01 | YCDrDroid Your best friend in production. · drdroid.io | still up |
| 2023-06-01 | YCSilimate Fast, efficient agents for chip design and debug · silimate.com | still up |
| 2023-04-21 | appteum.com | gone |
| 2023-03-20 | micro.dev | still up |
| 2023-01-01 | YCFastgen Webflow for the Backend · fastgen.com | still up |
| 2023-01-01 | YCChima Building infrastructure tools to help large companies customize their… · withchima.com | still up |
| 2023-05-03 | spotlight.dev | still up |
| 2023-01-01 | YCSkyhook PaaS-like experience with the power of Kubernetes, on your cloud · skyhook.io | still up |
| 2023-07-02 | vairflow.com | 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.