You asked about Developer Tools
78 people built something like it. 78 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2012-06-01 | Acquired by Xenon Ventures.We enable website developers to hook into… · filestack.com | gone |
| 2021-01-01 | YCAXAR AI Multi-agent orchestration platform · axar.ai | gone |
| 2016-06-01 | YCSeerslab We are providing AR technologies and contents to app developers · argear.io | gone |
| 2020-01-01 | YCDatree Datree prevents Kubernetes misconfigurations from reaching production · datree.io | gone |
| 2020-06-01 | YCShuttle Build Backends. Fast. · shuttle.dev | gone |
| 2023-06-01 | YCAtla The improvement engine for AI agents · atla-ai.com | gone |
| 2020-06-01 | Data Quality & Playback Platform · streamdal.com | gone |
| 2021-06-01 | Never code alone. · squire.ai | gone |
| 2020-01-01 | YCDropbase AI app builder for internal tools. Build back-office software faster… · dropbase.io | gone |
| 2022-01-01 | YCPloomber Heroku for AI · ploomber.io | gone |
| 2018-06-01 | YCXkit Universal CRM integration for B2B SaaS apps · xkit.co | gone |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2020-06-01 | YCDuckly Video chat with real-time collaboration. · duckly.com | gone |
| 2023-06-01 | The publishing layer for the agentic internet · structuredlabs.com | gone |
| 2023-01-01 | YCLynx AI platform for investigating and resolving engineering incidents · uselynx.ai | gone |
| 2024-01-01 | YCTesseral The open source platform for managing identity in business software · tesseral.com | gone |
| 2020-01-01 | YCEnveloop Design and send messages from your app with a simple API. · enveloop.com | gone |
| 2012-06-01 | Eve is our way of bringing the power of computation to everyone, not… · kodowa.com | gone |
| 2022-01-01 | YCVessel Developer-first, native integration platform for GTM tools · vessel.dev | gone |
| 2019-06-01 | YCUnflow The next generation CMS built for mobile apps · unflow.com | gone |
| 2021-06-01 | YCAbbot Your Customer Success Co-Pilot · ab.bot | gone |
| 2023-06-01 | Aide is an AI-native , privacy-first IDE built on top of VSCode · aide.dev | gone |
| 2020-06-01 | YCReploy Instant, shareable staging environments · getreploy.com | gone |
| 2019-06-01 | YCLunaSec An Open Source dependency security tool that is smarter than the rest · lunasec.io | gone |
| 2022-06-01 | The IAM Policy Copilot · slauth.io | gone |
| 2022-06-01 | API for Retrieval Augmented Generation · superpowered.ai | gone |
| 2018-06-01 | YCContrast Developer Handoff - Reimagined for Storybook · mismatch.app | gone |
| 2012-01-01 | YCMarft Marft creates embeddable machine learning models for application… · marft.com | gone |
| 2023-01-01 | YCSecond AI-Native Enterprise Codebase Maintenance · second.dev | gone |
| 2022-06-01 | YCGrai Open source version control for metadata · grai.io | gone |
| 2022-01-01 | Bioinformatics pipelines in the cloud · flowdeploy.com | gone |
| 2021-01-01 | YCCodeball AI-Powered Code Review · codeball.ai | gone |
| 2021-01-01 | YCTriplit The best database for app developers · triplit.dev | gone |
| 2020-06-01 | YCAtomized Enabling teams to deploy without needing a cloud expert · atomizedhq.com | gone |
| 2020-01-01 | YCPashi Pashi builds software to operate and optimize production lines. · pashi.com | gone |
| 2019-06-01 | YCFlow Improve your browsing experience by staying organized and intentful · enterflow.app | gone |
| 2019-06-01 | Turn any website into an API · dashblock.com | gone |
| 2012-06-01 | Convert Design files to working websites automagically · markupwand.com | gone |
| 2025-09-01 | YCRovr AI FDE Engine that runs your engineering workflows · withrovr.com | gone |
| 2024-06-01 | YCInvaria The next generation logging and observability platform · invaria.com | gone |
| 2024-01-01 | API For PDF Document Workflows · fileforge.com | gone |
| 2021-06-01 | Delightful components for iOS. · movingparts.io | gone |
| 2024-09-01 | YCGait Building Dev Infra for AI Software Engineers · getgait.com | gone |
| 2024-01-01 | YCPreloop Translate your experimental scripts into production ML services · preloop.com | gone |
| 2023-01-01 | AI-powered data extraction engine · indexical.dev | gone |
| 2023-01-01 | YCCakework API that adds cloud hosting to any developer platform · cakework.com | gone |
| 2023-01-01 | YCmoonrepo Open source build tool for monorepos and large codebases · moonrepo.dev | gone |
| 2023-01-01 | The Gen AI evaluation and curation platform · magicflow.ai | gone |
| 2021-01-01 | YCLunatic Operating System for server-side apps · lunatic.solutions | gone |
| 2020-06-01 | YCMonosi Open Source Data Observability · monosi.dev | gone |
| 2023-01-01 | YCDefer Zero infrastructure background processing platform. · defer.run | gone |
| 2021-01-01 | YCGalaxy launchpointhq.com | gone |
| 2023-01-01 | Helps Developers build stunning UI Lightning Fast ⚡️ · codeparrot.ai | gone |
| 2023-06-01 | YCBriefer The collaborative data platform. · briefer.cloud | gone |
| 2015-01-01 | YCNextop Nextop optimizes the path between your app and backend. Client… · nextop.io | gone |
| 2015-01-01 | YCOmniref Sticky notes for code.
(We're building a community-powered,… · omniref.com | gone |
| 2013-06-01 | YCKivo Git for Documents · kivo.com | gone |
| 2013-06-01 | Instant sandboxed server environments · stackmachine.com | gone |
| 2022-06-01 | Confidently ship analytics code faster with fewer errors · ilumadata.io | gone |
| 2012-06-01 | Helping developers scale their applications with ease. · paralleluniverse.co | 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.