You asked about Developer Tools
83 people built something like it. 13 are gone.
That is 19% of the ones whose fate we could settle, against 23% across the whole register. 15 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-01-01 | Unified platform for secrets, certs, and privileged access management · infisical.com | still up |
| 2023-01-01 | YCResend Email for developers · resend.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 |
| 2023-06-01 | 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 |
| 2023-06-01 | YCArtie Software that streams data from databases to warehouses in real-time · artie.com | still up |
| 2023-01-01 | Transform any software to multi-cloud SaaS in minutes not years · omnistrate.com | still up |
| 2023-01-01 | YCCosine Fully Agentic SWE · cosine.sh | still up |
| 2023-06-01 | YCParadeDB Unify application data, vectors, and full-text search in one Postgres · paradedb.com | still up |
| 2023-01-01 | YCBoundary The programming language for AI · boundaryml.com | still up |
| 2023-06-01 | YCAtla The improvement engine for AI agents · atla-ai.com | gone |
| 2023-06-01 | YCrefine Open-source Retool for enterprise · refine.dev | still up |
| 2023-01-01 | YCLiteLLM Call every LLM API like it's OpenAI [100+ LLMs] · litellm.ai | still up |
| 2023-01-01 | YCReflex The operating system for building mission-critical enterprise apps. · reflex.dev | still up |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2023-01-01 | Know what your LLM is doing — and why it’s failing · traceloop.com | acquired |
| 2023-01-01 | YCIcePanel Design and explain complex software architecture. · icepanel.io | still up |
| 2023-01-01 | Build and deploy fully‑managed AI agents and workflows · trigger.dev | still up |
| 2023-06-01 | YCSilimate Fast, efficient agents for chip design and debug · silimate.com | still up |
| 2023-01-01 | The open source, fullstack monitoring platform: stop guessing why… · highlight.io | acquired |
| 2023-01-01 | YCDrDroid Your best friend in production. · drdroid.io | still up |
| 2023-06-01 | YCTempo Visual Editor for React, powered by AI · tempo.new | still up |
| 2023-01-01 | YCChima Building infrastructure tools to help large companies customize their… · withchima.com | still up |
| 2023-01-01 | YCFastgen Webflow for the Backend · fastgen.com | still up |
| 2023-01-01 | YCSkyhook PaaS-like experience with the power of Kubernetes, on your cloud · skyhook.io | still up |
| 2023-01-01 | YCNango A single API for all your integrations · nango.dev | still up |
| 2023-01-01 | YCPropexo Plaid for Commercial Real Estate · propexo.com | still up |
| 2023-06-01 | YCCorgea Corgea finds, and fixes insecure code and packages autonomously. · corgea.com | still up |
| 2023-06-01 | YCCedana Fast, reliable, reproducible AI with GPU live migration · cedana.ai | still up |
| 2023-06-01 | The publishing layer for the agentic internet · structuredlabs.com | gone |
| 2023-06-01 | Open source GenAI development platform · flowiseai.com | acquired |
| 2023-01-01 | YCHelicone LLM Observability for Developers · helicone.ai | acquired |
| 2023-01-01 | YCLynx AI platform for investigating and resolving engineering incidents · uselynx.ai | gone |
| 2023-06-01 | YCSweep The best AI coding assistant for JetBrains · sweep.dev | still up |
| 2023-06-01 | YCGlide Crypto Deposits, Wallet Funding, and Pay-with-crypto Infra · buildwithglide.com | acquired |
| 2023-01-01 | YCOpenInt Open Source Embedded Product Integrations · openint.dev | acquired |
| 2023-01-01 | Dataset Management for AI Trainers · truthsuite.com | still up |
| 2023-01-01 | The interface for your database · outerbase.com | acquired |
| 2023-06-01 | Aide is an AI-native , privacy-first IDE built on top of VSCode · aide.dev | gone |
| 2023-01-01 | YCSecond AI-Native Enterprise Codebase Maintenance · second.dev | gone |
| 2023-06-01 | YCTrainy Infrastructure for managing GPU clusters for training/serving. · trainy.ai | still up |
| 2023-01-01 | YCVocode Open source Voice AI · vocode.dev | acquired |
| 2023-01-01 | Automating root cause analysis with generative AI · wildmoose.ai | still up |
| 2023-01-01 | AI Agent for Cloud Infrastructure · infra.new | still up |
| 2023-01-01 | Design and build great interfaces · designbase.com | still up |
| 2023-06-01 | YCMorph Fast Models Optimized for Coding Agents · morphllm.com | still up |
| 2023-06-01 | YCCORE Your AI butler that understands you really well and proactively acts… · getcore.me | still up |
| 2023-06-01 | Infuse knowledge into language models with just 10 samples · automorphic.ai | still up |
| 2023-06-01 | AI-powered Infrastructure as Code PR reviews · tryterracotta.com | still up |
| 2023-01-01 | YCco.dev Turn your ideas into full-stack apps · co.dev | still up |
| 2023-06-01 | YCInconvo Build chat-with-data agents for customer-facing applications · inconvo.com | still up |
| 2023-06-01 | YCsudocode orchestrate your coding agents with sudocode · sudocode.ai | still up |
| 2023-06-01 | YCChatter Dead simple LLM testing and iteration · chatter.anish.xyz | acquired |
| 2023-06-01 | YCBaserun Observability and evaluation platform for LLM apps. · baserun.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.