You asked about Productivity
31 people built something like it. 5 are gone.
That is 18% of the ones whose fate we could settle, against 23% across the whole register. 3 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-06-01 | End-to-end content, learning, & deal intelligence for B2B sales teams · letter.ai | still up |
| 2023-06-01 | YCLangdock The all-in-one AI platform for companies. · langdock.com | still up |
| 2023-04-07 | teamsmart.ai | moved |
| 2023-01-01 | Automate data-driven slide decks and documents with AI · rollstack.com | still up |
| 2023-06-01 | YCkapa.ai The fastest way to build AI assistants on technical content · kapa.ai | still up |
| 2023-01-01 | YCFloworks Hire the best AI Sales employees | AI SDR | AI RevOps | AI EA · floworks.ai | still up |
| 2023-12-30 | inko.cat | still up |
| 2023-01-01 | The Control Plane for Enterprise Agents · credal.ai | still up |
| 2023-07-17 | coda.io | still up |
| 2023-06-01 | AI that audits AI — catching hallucinations before you ship them. · energent.ai | still up |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2023-07-27 | readyrunner.ai | unverified |
| 2023-06-01 | YCUpstream The first inbox designed for humans and agents · upstream.do | still up |
| 2023-09-14 | officeautomata.com | unverified |
| 2023-01-01 | YCUnify AI teammates for everyone else 🤖 · unify.ai | still up |
| 2023-06-01 | Building the next Procore · constructable.ai | still up |
| 2023-01-01 | YCAlloy AI prototyping tool for product managers · alloy.app | still up |
| 2023-01-01 | YCType AI-native storytelling studio. · type.ai | still up |
| 2023-10-29 | dailytoo.com | still up |
| 2023-06-01 | YCKino AI Kino is an AI media manager and video editor for humans and agents. · kino.ai | still up |
| 2023-01-01 | YCCardinal Your AI product backlog · cardinalapp.io | acquired |
| 2023-06-01 | YCCORE Your AI butler that understands you really well and proactively acts… · getcore.me | still up |
| 2023-06-01 | YCSidenote Meeting follow-up, automated · sidenote.ai | gone |
| 2023-06-01 | YCWatto AI AI-powered McKinsey-quality reports in seconds · watto.ai | acquired |
| 2023-06-01 | YCAutotab AI agents reliable enough to do real work · autotab.com | acquired |
| 2023-01-01 | YCOverlord AI Accountability Partner · overlord.app | still up |
| 2023-01-01 | YCSorted Instant SaaS management · sorted-lp.webflow.io | gone |
| 2023-01-01 | YCLinkGrep AI browser copilot for teams · linkgrep.com | still up |
| 2023-01-01 | Helps Developers build stunning UI Lightning Fast ⚡️ · codeparrot.ai | gone |
| 2023-06-01 | YCKhoj AI for humans · khoj.dev | still up |
| 2023-01-01 | YCEpsilon AI Search Engine for Academic Research · epsilon-ai.com | still up |
| 2023-06-01 | Program computers with natural language · magicloops.dev | still up |
| 2023-01-01 | YCmoonrepo Open source build tool for monorepos and large codebases · moonrepo.dev | gone |
| 2023-01-01 | Create step by step articles with screenshots and videos 10x faster · gluetrail.com | gone |
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.