You asked about Developer Tools
101 people built something like it. 24 are gone.
That is 27% of the ones whose fate we could settle, against 23% across the whole register. 12 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-12 | vantage.sh | still up |
| 2021-01-09 | thesmartcoder.dev | moved |
| 2021-01-22 | gitnews.tech | still up |
| 2021-01-09 | convier.me | gone~19mo |
| 2021-01-01 | Tools & infra to build and scale high-quality blockchain applications. · quicknode.com | still up |
| 2021-01-01 | YCAlokai Frontend Platform for eCommerce · alokai.com | still up |
| 2021-11-28 | indiedevs.net | unverified |
| 2021-05-28 | fusebot.io | gone |
| 2021-06-01 | YCRootly AI-native on-call and incident response carefully crafted to help… · rootly.com | still up |
| 2021-06-01 | YCExa Web search rebuilt for LLMs · exa.ai | still up |
| 2021-06-01 | YCAnakin One API to get clean data from any website for your AI agents at scale · anakin.io | still up |
| 2021-01-01 | YCFintoc Account-to-Account payments in Mexico and Chile. · fintoc.com | still up |
| 2021-01-01 | YCMindee AI Document Understanding API · mindee.com | still up |
| 2021-07-02 | hetchr.com | gone |
| 2021-01-01 | YCVapi Voice AI for developers. · vapi.ai | still up |
| 2021-06-09 | usegarnet.com | gone |
| 2021-01-01 | YCTint Makes it easy for tech platforms to embed insurance into products · tint.ai | still up |
| 2021-01-01 | YCAXAR AI Multi-agent orchestration platform · axar.ai | gone |
| 2021-01-01 | YCSigNoz Open source alternative to DataDog · signoz.io | still up |
| 2021-09-07 | blog.spiceai.org | still up |
| 2021-06-30 | leapp.cloud | gone |
| 2021-06-01 | YCFormance Open Source Infrastructure for the Financial Internet · formance.com | still up |
| 2021-01-01 | YCauthzed Authorization Infrastructure securing AI at OpenAI, Zoom, & more · authzed.com | still up |
| 2021-06-01 | YCPluggy Plaid for Brazil: we allow developers to access users' financial data · pluggy.ai | still up |
| 2021-08-11 | uiguideline.com | still up |
| 2021-07-10 | airclick.io | still up |
| 2021-01-01 | API for developers and AIs to access health data · tryterra.co | still up |
| 2021-06-01 | Subscription infrastructure & paywall experimentation for mobile apps · superwall.com | still up |
| 2021-01-01 | Shift FinOps Left: Proactively Find & Fix Cloud Cost Issues · infracost.io | still up |
| 2021-06-01 | Executable specifications in English for test automation · testrigor.com | still up |
| 2021-06-01 | The fastest way to ship airtight AI · openlayer.com | still up |
| 2021-01-01 | YCOpenCode The open source AI coding agent · opencode.ai | still up |
| 2021-01-01 | YCUiflow No-code platform for enterprise software companies · ycombinator.com | acquired |
| 2021-04-12 | openresume.dev | gone |
| 2021-06-01 | YCReplo Sell anything · replo.app | still up |
| 2021-06-01 | YCUnion54 Developers of ChitChat, an integrated messaging and payments wallet… · union54.com | still up |
| 2021-06-01 | YCNoloco Flexible Business Apps for Modern Teams · noloco.io | still up |
| 2021-06-01 | Automated e2e screenshot testing without writing or maintaining tests · meticulous.ai | still up |
| 2021-06-01 | AI native mobile testing. · mobileboost.io | still up |
| 2021-06-01 | YChotglue Native user-facing SaaS integrations for your customers · hotglue.com | still up |
| 2021-04-14 | flutterchallenge.dev | gone |
| 2021-11-09 | dev.page | gone |
| 2021-01-01 | YCSvix Enterprise ready webhooks service, open-source and in the cloud · svix.com | still up |
| 2021-01-01 | YCweweb.io WeWeb is a no-code front-end builder that connects with any back-end. · weweb.io | still up |
| 2021-04-24 | toolkit.addy.codes | still up |
| 2021-06-01 | YCArchbee TURN STATIC DOCS INTO INSTANT ANSWERS · archbee.com | still up |
| 2021-01-01 | YCMystic Low latency API to run and deploy ML models · mystic.ai | still up |
| 2021-06-01 | YCDailybot Make all team work visible — people and AI agents · dailybot.com | still up |
| 2021-06-19 | readyui.co | still up |
| 2021-01-19 | checklyhq.com | still up |
| 2021-06-01 | YCDots 💸 Developer friendly drop in payouts infrastructure · usedots.com | still up |
| 2021-06-01 | YCArengu Build frictionless signup flows in minutes · arengu.com | acquired |
| 2021-03-14 | user-interface.io | moved |
| 2021-06-01 | YCPipekit Pipekit scales data & CI pipelines for enterprises · pipekit.io | still up |
| 2021-01-01 | Supercharge your mobile apps · emergetools.com | acquired |
| 2021-06-18 | time.lol | still up |
| 2021-01-01 | Build better computer vision models by building better datasets · segments.ai | acquired |
| 2021-06-01 | Accelerate software development with WarpBuild's 10x faster CI infra. · warpbuild.com | still up |
| 2021-01-01 | YCAvenue Observability platform for operations teams · avenue.app | acquired |
| 2021-11-04 | usegravity.app | 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.