You asked about Developer Tools
35 people built something like it. 9 are gone.
That is 32% of the ones whose fate we could settle, against 23% across the whole register. 7 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-02-21 | phind.com | unverified |
| 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 | predibase.com | unverified |
| 2023-01-01 | YCLiteLLM Call every LLM API like it's OpenAI [100+ LLMs] · litellm.ai | still up |
| 2023-06-01 | YCAtla The improvement engine for AI agents · atla-ai.com | gone |
| 2023-01-01 | YCBoundary The programming language for AI · boundaryml.com | still up |
| 2023-01-01 | Build and deploy fully‑managed AI agents and workflows · trigger.dev | still up |
| 2023-01-01 | Know what your LLM is doing — and why it’s failing · traceloop.com | acquired |
| 2023-06-01 | YCTempo Visual Editor for React, powered by AI · tempo.new | still up |
| 2023-10-05 | news.aiapipro.com | gone |
| 2023-06-01 | Open source GenAI development platform · flowiseai.com | acquired |
| 2023-01-01 | YCLynx AI platform for investigating and resolving engineering incidents · uselynx.ai | gone |
| 2023-01-01 | YCHelicone LLM Observability for Developers · helicone.ai | acquired |
| 2023-06-01 | YCCedana Fast, reliable, reproducible AI with GPU live migration · cedana.ai | still up |
| 2023-06-01 | Aide is an AI-native , privacy-first IDE built on top of VSCode · aide.dev | gone |
| 2023-06-01 | YCSweep The best AI coding assistant for JetBrains · sweep.dev | still up |
| 2023-01-01 | Dataset Management for AI Trainers · truthsuite.com | still up |
| 2023-01-01 | Automating root cause analysis with generative AI · wildmoose.ai | still up |
| 2023-06-01 | YCCORE Your AI butler that understands you really well and proactively acts… · getcore.me | still up |
| 2023-01-01 | YCVocode Open source Voice AI · vocode.dev | acquired |
| 2023-01-01 | YCSecond AI-Native Enterprise Codebase Maintenance · second.dev | gone |
| 2023-06-01 | AI-powered Infrastructure as Code PR reviews · tryterracotta.com | still up |
| 2023-01-01 | AI Agent for Cloud Infrastructure · infra.new | still up |
| 2023-01-01 | YCSage AI Your self-generating, self-maintaining code knowledge base. · sage-ai.dev | still up |
| 2023-01-01 | Helps Developers build stunning UI Lightning Fast ⚡️ · codeparrot.ai | gone |
| 2023-01-01 | AI coding copilot engineered for performance · double.bot | still up |
| 2023-01-01 | AI-powered data extraction engine · indexical.dev | gone |
| 2023-06-01 | YCMetoro AI SRE For Teams on Kubernetes · metoro.io | still up |
| 2023-01-01 | The Gen AI evaluation and curation platform · magicflow.ai | gone |
| 2023-01-01 | Open source tools & services for reliable AI Agents & AI Applications · dagworks.io | acquired |
| 2023-06-01 | YCParea Test, evaluate & observe your LLM applications · parea.ai | still up |
| 2023-06-01 | YCVango AI Development platform that makes it 10x easier to improve visual models · vango.ai | gone |
| 2023-06-01 | YCBaserun Observability and evaluation platform for LLM apps. · baserun.ai | still up |
| 2023-06-01 | YCChatter Dead simple LLM testing and iteration · chatter.anish.xyz | acquired |
| 2023-01-01 | YCLightski Transform Document Workflows with AI Agents · lightski.com | still up |
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.