You asked about Reinforcement Learning

40 people built something like it. 4 are gone.

That is 11% of the ones whose fate we could settle, against 23% across the whole register. 2 were acquired.

Matching
40
Gone
11%
Median life
Acquired
2

Matching launches

checked 10 hours ago · 250 probed today
LaunchedWhat it wasToday
2024-06-01
Data Development for Advanced AI · sepalai.com
acquired
2024-06-01
Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs. · unsloth.ai
still up
2024-01-01
Autonomously scaling environments · vibrantlabs.com
still up
2024-01-01
Agentic Marketing Platform · getjust.ai
still up
2024-09-01
Prompt and Context Optimization for Coding Agents · usesynth.ai
still up
2024-01-01
Self-improving content bank for marketing · useresonance.com
acquired
2024-09-01
AI tutors for students. · generallearning.com
still up
2024-06-01
The organic growth engine for financial advisors · finny.com
still up
2024-01-01
The secondary market for real estate leases · rysemarket.com
still up
2024-06-01
Autonomous freight coordination · cartage.ai
still up
2024-01-01
Autonomous organizations without humans in the loop · andonlabs.com
still up
2024-09-01
The high-performance file system that connects AI to data · archil.com
still up
2024-06-01
Capitol: the sovereign operating system for intelligence. · capitol.ai
still up
2024-01-01
Open-source humanoid robots · kscale.dev
gone
2024-01-01
Applied AI Data Research Lab Encoding Human Expertise into Machines… · useocular.com
still up
2024-06-01
AI avatars to scale healthcare training. · simcare.ai
still up
2024-06-01
Create professional videos in minutes with AI, online or via API · videogen.io
still up
2024-09-01
AI-powered demand forecasting for retail · metreecs.com
still up
2024-06-01
AI-Powered Product Data Enrichment · anglera.com
still up
2024-06-01
We're training the next generation of protein foundation models. · anthrogen.com
still up
2024-06-01
We make robots that move boxes in warehouses · autopallet.bot
still up
2024-09-01
YCx1
AI app builder for creating and launching iPhone apps · x1.new
still up
2024-01-01
Ultimate AI Math Problem Solver to Revolutionize Personalized Learning · info.mathos.ai
still up
2024-01-01
Every student's personalized learning assistant · shepherd.study
still up
2024-06-01
Enzyme design models. · ligo.bio
still up
2024-06-01
AI that operates quantum computers for scientific discovery · conductorquantum.com
still up
2024-06-01
The video context layer for AI. · cloudglue.dev
still up
2024-06-01
Feed of insights extracted from your go-to sources using LLMs. · et-al.io
still up
2024-01-01
Translate your experimental scripts into production ML services · preloop.com
gone
2024-01-01
Cloud platform for coding agents · ellipsis.dev
still up
2024-09-01
AI Co-Pilot for Design · supercontrast.com
gone
2024-09-01
Desktop RPA with AI computer use · autocomputer.ai
still up
2024-09-01
Pushing the boundaries of AI · zeroframe.ai
gone
2024-06-01
AI agents to enroll providers with payors · simplex.sh
still up
2024-09-01
Extending AI to interact with the real world · usemoonshine.com
still up
2024-06-01
Open source agentic BI for founders · minusx.ai
still up
2024-06-01
Open source AI copilot that knows your company's code and its context · storia.ai
still up
2024-09-01
The best way to hire clinical talent. · matcha-health.com
still up
2024-09-01
AI realtime voice companion for language learning · issen.com
still up
2024-06-01
An AI agent for scientific research · undermind.ai
still up

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.