You asked about SaaS
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2014-01-01 | YCWeave Customer communication and payments platform. · getweave.com | acquired |
| 2011-06-01 | YCSegment Software and APIs to collect, clean, and control customer data. · segment.com | acquired |
| 2013-01-01 | YCHeap Captures user interactions with no code to generate analytics. · heap.io | acquired |
| 2012-06-01 | YCLever Talent Acquisition Suite that combines ATS + Talent CRM · lever.co | acquired |
| 2012-06-01 | YCClever The platform that powers technology in the classroom. · clever.com | acquired |
| 2015-06-01 | PartnerStack is a full stack solution for partnerships. · partnerstack.com | acquired |
| 2014-01-01 | YCAxoni Axoni is building the next generation of capital markets technology · axoni.com | acquired |
| 2017-01-01 | YCUpKeep Mobile-first software for maintenance teams. · upkeep.com | acquired |
| 2016-01-01 | YCGitPrime Visibility and analytics for software development leaders. · gitprime.com | acquired |
| 2019-01-01 | YCConvex Software for the commercial services industry. · convex.com | acquired |
| 2016-06-01 | YCWorkRamp The All-in-One Learning Platform · workramp.com | acquired |
| 2019-06-01 | YCLocalyze Global mobility platform for companies and employees · localyze.com | acquired |
| 2011-01-01 | eSignature software for small and mid-market businesses. · hellosign.com | acquired |
| 2019-01-01 | Higher Ed's Best Friend - integrated academic operations software. · coursedog.com | acquired |
| 2015-01-01 | YCBonfire Bonfire is reimagining RFPs & bidding for gov procurement teams · gobonfire.com | acquired |
| 2019-01-01 | YCMemfault First IoT reliability platform for debugging, monitoring, OTA updates · memfault.com | acquired |
| 2019-01-01 | YCHatch The AI CSR Platform · usehatch.ai | acquired |
| 2015-06-01 | Intelligent technical hiring. · triplebyte.com | acquired |
| 2021-06-01 | YCMailmodo No-code email marketing platform to send forms & widgets within emails · mailmodo.com | acquired |
| 2015-01-01 | YCRemix We’re building a platform to empower cities to plan the best possible… · remix.com | acquired |
| 2019-01-01 | YCForage Online job simulations for companies to train, and then hire, students · theforage.com | acquired |
| 2019-06-01 | YCEmbrace Modern user-focused observability built on OpenTelemetry · embrace.io | acquired |
| 2013-06-01 | Legal Operations for corporate legal teams. · simplelegal.com | acquired |
| 2020-06-01 | YCSafeBase Trust Center platform that scales customer security reviews · safebase.io | acquired |
| 2014-06-01 | The system of record for government affairs. · govpredict.com | acquired |
| 2013-01-01 | VaycayHero is a marketplace of professionally managed vacation… · vaycayhero.com | acquired |
| 2014-01-01 | YCDevCycle Feature Flag Management Built for Developers · devcycle.com | acquired |
| 2011-01-01 | SaaS to increase speed and quality of clinical trials. · comprehend.com | acquired |
| 2012-01-01 | YCFond Rewards and recognition SaaS for HR leaders · fond.co | acquired |
| 2019-06-01 | YCVendr The AI negotiation agent to help you save money on SaaS. · vendr.com | acquired |
| 2019-06-01 | YCCuboh We help restaurants manage their online orders. · cuboh.com | acquired |
| 2012-01-01 | YCSwiftype Smart search for the modern team. · swiftype.com | acquired |
| 2011-06-01 | Powering scientific outsourcing · scienceexchange.com | acquired |
| 2013-06-01 | Apptimize lets mobile teams innovate faster to create an amazing user… · apptimize.com | acquired |
| 2015-06-01 | YCJopwell Career advancement for Black, Latinx & Native American professionals. · jopwell.com | acquired |
| 2015-06-01 | YCEden Workplace software for people-centric companies. · edenworkplace.com | acquired |
| 2015-01-01 | YCHigherMe Helping restaurant employers find & hire better employees faster · higherme.com | acquired |
| 2019-01-01 | YCGeosite Geosite is an enterprise SaaS platform for spatial data. · geosite.io | acquired |
| 2021-06-01 | YCDeed Making it easy for employees to donate and volunteer with good causes. · joindeed.com | acquired |
| 2018-06-01 | YCBerbix Convert more verified users. Instantly & accurately validate user IDs. · berbix.com | acquired |
| 2019-06-01 | Learn from the experts at your company. · togetherplatform.com | acquired |
| 2014-06-01 | YCImpraise Enable managers to create an effective work environment for their team · impraise.com | acquired |
| 2016-01-01 | YCStilt Financial products for immigrants (acquired by JG Wentworth) · stilt.com | acquired |
| 2020-06-01 | AI-powered user assistance platform · command.ai | acquired |
| 2019-01-01 | YCAXDRAFT AXDRAFT helps corporations draft, negotiate and approve documents 10x… · axdraft.com | acquired |
| 2020-01-01 | Data observability for modern data teams · metaplane.dev | acquired |
| 2017-06-01 | YCEnzyme Automating regulatory approval & compliance for life science companies · enzyme.com | acquired |
| 2021-01-01 | YCFinley Streamline your debt capital raise and management · finleycms.com | acquired |
| 2014-01-01 | YCAbacus Making expense reports obsolete · abacus.com | acquired |
| 2022-06-01 | YCTigerEye AI for Construction · tigereye.com | acquired |
| 2023-01-01 | YCFern Instantly offer SDKs and API Docs · buildwithfern.com | acquired |
| 2021-06-01 | YCGoodkind Student communications platform for higher education · goodkind.com | acquired |
| 2022-06-01 | YCAlterya Protecting Humans from Scams · alterya.dev | acquired |
| 2020-06-01 | YCPlerk Acquired by Minu.mx - Fintech solutions for employees, starting with… · plerk.io | acquired |
| 2016-01-01 | YCBonsai The all-in-one solution for small businesses and self-employed. · hellobonsai.com | acquired |
| 2019-06-01 | Spark-on-Kubernetes Data Engineering Platform · datamechanics.co | acquired |
| 2015-01-01 | YCSigOpt SigOpt is an Optimization-as-a-Service platform that seamlessly tunes… · sigopt.com | acquired |
| 2021-01-01 | YCUiflow No-code platform for enterprise software companies · ycombinator.com | acquired |
| 2020-01-01 | Helping 100+ brands bring all quality and compliance operations… · factoredquality.com | acquired |
| 2019-01-01 | Talent AI improving quality of hire · searchlight.ai | acquired |
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.