You asked about Search

113 people built something like it. 15 are gone.

That is 15% of the ones whose fate we could settle, against 23% across the whole register. 11 were acquired.

Matching
113
Gone
15%
Median life
—
Acquired
11

Matching launches · 60 of 113

checked 8 hours ago · 250 probed today
LaunchedWhat it wasToday
2014-01-01
A developer-friendly and enterprise-grade search API. · algolia.com
still up
2024-06-01
Growth through always‑on consumer understanding · conveo.ai
still up
2021-06-01
YCExa
Web search rebuilt for LLMs · exa.ai
still up
2020-06-01
Platform for breakthrough mental health research and treatment · osmind.org
still up
2010-06-01
Hipmunk takes the agony out of searching for flights, accommodations,… · hipmunk.com
acquired
2012-01-01
Smart search for the modern team. · swiftype.com
acquired
2021-01-01
User research on autopilot. · greatquestion.co
still up
2015-01-01
The affordable way to search, find & communicate with an incarcerated… · pigeonly.com
gone
2022-01-01
Agentic User Research Infrastructure · rallyuxr.com
still up
2021-06-01
Track & Boost Your Brand’s Visibility in AI Search · writesonic.com
still up
2020-06-01
GPT Search & Merchandising for fashion e-commerce · depict.ai
still up
2023-06-01
AI-powered user interviews · outset.ai
still up
2025-01-01
Applied research lab curating data solutions for foundation model… · afterquery.com
still up
2024-01-01
The complete agentic document platform · reducto.ai
still up
2015-06-01
ROSS is an AI-powered legal research platform that can read and… · rossintelligence.com
gone
2022-01-01
The real-time retrieval engine for search, feeds, and agents. · shaped.ai
still up
2024-01-01
AI Applied Research · toma.com
still up
2019-01-01
Talent AI improving quality of hire · searchlight.ai
acquired
2024-01-01
Open Source AI Chat · onyx.app
acquired
2019-01-01
Research and data to make progress against the world’s largest… · ourworldindata.org
still up
2021-06-01
AI Copilot for insights & strategy · coloop.ai
still up
2018-06-01
Virtual Lab Managers for scientists and biotech, research Labs · happilabs.org
acquired
2020-01-01
tambua.health
still up
2025-01-01
Be the Answer in AI Search - AI SEO across SEO, GEO & AEO · athenahq.ai
still up
2021-01-01
Dramatically better search and ads for marketplaces · promoted.ai
acquired
2025-01-01
Foundational model of human societies for consequential decisions · societies.io
still up
2007-01-01
Octopart is a search engine for electronic components · octopart.com
acquired
2024-01-01
AI research lab automating all of investing · ehl.markets
still up
2024-09-01
Enter your domain & Origami gets you customers. · origami.chat
still up
2018-06-01
Research and analytics company focused on college students. · collegepulse.com
still up
2024-01-01
YCego
AI applied research lab building synthetic sapience; human-like AI · egoai.com
still up
2024-01-01
Applied AI Data Research Lab Encoding Human Expertise into Machines… · useocular.com
still up
2021-01-01
AI-led market research interviews, no scheduling, instant insights. · unsurvey.ai
acquired
2024-01-01
All-in-one API for search, RAG, & recommendations · trieve.ai
acquired
2023-06-01
YCSID
AI research center for retrieval · sid.ai
still up
2024-09-01
Agent simulation and RL for researchers · abundant.ai
still up
2025-09-01
Infrastructure for AI labs to focus on research. · sf-tensor.com
still up
2023-06-01
Search engine for trustworthy medical information. · medisearch.io
still up
2021-06-01
AI native ATS + CRM for executive search firms · stardex.com
still up
2025-01-01
AI-powered research desk for hedge funds · trytrata.com
still up
2025-09-01
Real-time semantic search for Conversational AI · moss.dev
still up
2022-01-01
Search and automation for engineer-to-order companies · capuchin.ai
still up
2023-01-01
Empowering every doctor and every patient to participate in research · novel.care
still up
2025-01-01
Frontier AI research to advance game development · nitrode.com
still up
2026-06-01
A research lab for one · omanta.com
still up
2024-06-01
AI for researchers · anara.com
still up
2021-06-01
AI-powered equity research software · hudson-labs.com
still up
2019-01-01
Travel planner for researching, organizing, and mapping your trip · wanderlog.com
still up
2024-06-01
Powerful quantitative forecasting models · zoaresearch.com
still up
2023-06-01
The publishing layer for the agentic internet · structuredlabs.com
gone
2025-09-01
Applied Lab focused on Search in Latent Spaces. · perseus.computer
still up
2022-06-01
AI search engine · phind.com
gone
2021-06-01
2 sided Marketplace for accelerating medical research · infiuss.com
still up
2021-01-01
Better, faster tech vendor research · taloflow.ai
still up
2025-06-01
Deep intelligence for private markets · serafis.ai
still up
2020-01-01
Transform your text data into a searchable knowledge graph · ardis.ai
gone
2014-06-01
Mobile surveys for researchers · metricwire.com
still up
2025-09-01
AI-powered market due diligence for investment decisions · diligencesquared.com
still up
2025-06-01
Building medical school for AI Agents · theorahq.com
still up
2023-06-01
AI Overview Search, as a Service · branch-ai.com
gone

How this compares

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.