You asked about Developer Tools
82 people built something like it. 9 are gone.
That is 11% of the ones whose fate we could settle, against 23% across the whole register. 1 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2024-01-01 | YCGreptile AI code review agent with complete context of your codebase · greptile.com | still up |
| 2024-01-01 | YCRespan Open-source, extensible AI gateway with observability and evals · respan.ai | still up |
| 2024-09-01 | YCRevyl The Mobile Development Platform · revyl.com | still up |
| 2024-01-01 | YCMomentic Mo, the AI QA engineer that bug-bashes your app before every release · momentic.ai | still up |
| 2024-06-01 | YCWordware AI agents you can rely on · wordware.ai | still up |
| 2024-09-01 | YCCekura Voice AI and Chat AI agents: Testing and Observability · cekura.ai | still up |
| 2024-09-01 | YCArchil The high-performance file system that connects AI to data · archil.com | still up |
| 2024-01-01 | YCZep AI The unified context layer for enterprise data · getzep.com | still up |
| 2024-06-01 | YCMem0 The Memory layer for AI Agents · mem0.ai | still up |
| 2024-06-01 | YCZeroPath Automatically find and fix your software vulnerabilities · zeropath.com | still up |
| 2024-06-01 | YCCoval Simulation & Evaluation that scales voice and chat AI agents · coval.dev | still up |
| 2024-06-01 | The GPU sandbox company · thundercompute.com | still up |
| 2024-06-01 | YCSpur Spur is the validation infrastructure enterprises use to ship at the… · spurtest.com | still up |
| 2024-06-01 | Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs. · unsloth.ai | still up |
| 2024-06-01 | Run a team of coding agents on your Mac · conductor.build | still up |
| 2024-01-01 | YCPazi Platform where autonomous companies are built · pazi.ai | still up |
| 2024-01-01 | YCTrieve All-in-one API for search, RAG, & recommendations · trieve.ai | acquired |
| 2024-01-01 | YCHatchet The orchestration platform for teams who ship. · hatchet.run | still up |
| 2024-09-01 | YCInnate Personal AI Robots · innate.bot | still up |
| 2024-01-01 | The developer platform for fast and reliable browser agents · cloudcruise.com | still up |
| 2024-06-01 | YCParty Secure multiplayer workspace for teams building with agents · trymaitai.com | still up |
| 2024-06-01 | YCVoker The Agent Analytics Platform · voker.ai | still up |
| 2024-01-01 | Autonomously scaling environments · vibrantlabs.com | still up |
| 2024-06-01 | YCLaminar Understand why your AI agent breaks. Iterate fast to fix it. · laminar.sh | still up |
| 2024-01-01 | YCTesseral The open source platform for managing identity in business software · tesseral.com | gone |
| 2024-09-01 | YCVariant Creative intelligence · variant.com | still up |
| 2024-09-01 | YCRyvn Easy and secure customer cloud deployments · ryvn.ai | still up |
| 2024-01-01 | YCInteguru Generate fast, reliable APIs for any platform · integuru.com | still up |
| 2024-06-01 | The most powerful sandboxes for AI Agents · freestyle.sh | still up |
| 2024-06-01 | YCHeroUI The UI framework for AI agents and developers to build beautiful apps. · heroui.com | still up |
| 2024-01-01 | Deploy trustworthy data agent that know your business · upsolve.ai | still up |
| 2024-01-01 | Helps teams work effectively with AI coding agents. · centauri-ai.tech | still up |
| 2024-01-01 | QA agents that write tests 10x faster with zero maintenance · getdecipher.com | still up |
| 2024-06-01 | The video context layer for AI. · cloudglue.dev | still up |
| 2024-01-01 | An all-in-one platform for building internal agents & workflows · keystroke.ai | still up |
| 2024-01-01 | YCTusk AI agent that generates unit and integration tests · usetusk.ai | gone |
| 2024-09-01 | YCFreebuff The free coding agent · freebuff.com | still up |
| 2024-09-01 | YCKilvin Custom software for your business · kilvin.ai | still up |
| 2024-09-01 | YCRelvy AI AI powered debugging notebooks for incident response · relvy.ai | still up |
| 2024-06-01 | YCMagiCode A Reliable AI Frontend Engineer · magicode.ai | still up |
| 2024-06-01 | AI agent that optimizes inference for embedded compute like Jetson · runlocal.ai | still up |
| 2024-06-01 | YCcmux Open source applied AI lab building next-gen devtools · cmux.com | still up |
| 2024-06-01 | YCHyrex The COLD Task Framework · hyrex.io | still up |
| 2024-06-01 | YCInvaria The next generation logging and observability platform · invaria.com | gone |
| 2024-06-01 | YCMiru Config Management for Robotics · mirurobotics.com | still up |
| 2024-09-01 | YCStruct Struct keeps prod running · struct.ai | still up |
| 2024-09-01 | YCSurge Stripe for telephony · surge.app | still up |
| 2024-01-01 | API For PDF Document Workflows · fileforge.com | gone |
| 2024-01-01 | Optimize performance on GPUs - 10x faster · ncompass.tech | still up |
| 2024-01-01 | YCSilogy An AI-powered test and debug platform for chip developers · silogy.io | still up |
| 2024-01-01 | YCNuanced the AI coding app for thinking. · nuanced.dev | still up |
| 2024-09-01 | YCGait Building Dev Infra for AI Software Engineers · getgait.com | gone |
| 2024-09-01 | YCEndstack The complete, collaborative workspace for humans and agents · endstack.com | still up |
| 2024-01-01 | Build interactive applications that run anywhere · renderlet.com | still up |
| 2024-01-01 | Custom video detection models in less than 5 minutes · dragoneye.ai | still up |
| 2024-09-01 | The multiplayer control plane for your software factory · humanlayer.com | still up |
| 2024-06-01 | Platform to build, use, and monetize fully autonomous agents · doublezero.tech | still up |
| 2024-09-01 | The platform for automated hiring and workforce decisions. · usemoonshine.com | still up |
| 2024-06-01 | ideate.xyz is an AI-powered 3D art suite on the web · ideate.xyz | still up |
| 2024-06-01 | YCCodeViz One living model of your software architecture · codeviz.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.