You asked about Reinforcement Learning

149 people built something like it. 9 are gone.

That is 7% of the ones whose fate we could settle, against 23% across the whole register. 13 were acquired.

Matching
149
Gone
7%
Median life
Acquired
13

Matching launches · 60 of 149

checked 12 hours ago · 250 probed today
LaunchedWhat it wasToday
2019-01-01
build AI NPCs · rct.ai
still up
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
2025-01-01
Reinforcement Learning (RL) for AI Agents · osmosis.ai
still up
2025-09-01
Large-scale real-world robot & human data for embodied AI · cortexrobot.ai
still up
2026-01-01
Robot Cowboys that Herd Cattle with AI Drones · brumby
still up
2026-06-01
The world's frontier hacker of AI agents. · fabraix.com
still up
2026-06-01
Training the world's best AI model for quantitative finance. · prodigy.markets
still up
2025-09-01
Specialized AI Agents. · sylvian.ai
gone
2025-01-01
AI Agents that automate enterprise software processes · agentin.ai
still up
2026-06-01
Open source AI gateway that turns your traffic into a better model · experientiallabs.ai
still up
2026-06-01
Expert computer-use data for frontier AI labs · markovstudios.com
still up
2015-01-01
Rebuilding healthcare with AI at the core · akidolabs.com
still up
2016-06-01
Data-centric infrastructure to accelerate the development of AI · scale.com
still up
2021-01-01
The data layer for physical AI · encord.com
still up
2020-06-01
Transform your decision-making with reliable AI agents in weeks, not… · taktile.com
still up
2022-01-01
We build the AI companion for nurses, to create time for care. · voize.de
still up
2016-01-01
Building foundational AI for speech transcription and understanding. · deepgram.com
still up
2021-01-01
Leading online after-school for kids & teens to learn AI & coding · codingal.com
still up
2020-06-01
We train AI engineers and connect them with companies. · soyhenry.com
still up
2023-06-01
End-to-end content, learning, & deal intelligence for B2B sales teams · letter.ai
still up
2021-01-01
AI Document Understanding API · mindee.com
still up
2021-01-01
AI tax workflow platform for accounting firms · soraban.com
still up
2015-01-01
Paperspace is a cloud platform for building and scaling AI… · paperspace.com
acquired
2022-01-01
Compliant-Ready AI for the Enterprise · dynamo.ai
still up
2018-01-01
PROVEN is using AI, data and personalization to disrupt CPG · provenskincare.com
still up
2019-01-01
Reshaping industrial quality with AI, hardware, and software · overview.ai
still up
2024-06-01
The organic growth engine for financial advisors · finny.com
still up
2024-09-01
AI tutors for students. · generallearning.com
still up
2022-01-01
Open-source, serverless vectordb for production-scale generative AI · lancedb.com
still up
2016-06-01
CrowdAI is the world's leading no-code platform for vision AI · crowdai.com
acquired
2025-01-01
High Quality Multilingual Training Data for AI Models · mundoai.world
still up
2022-01-01
Spade is the data and AI platform for modern finance. · spade.com
still up
2018-01-01
Every student's AI coach for college readiness · acely.com
still up
2020-06-01
Financial data layer for AI-powered finance and accounting · blueonion.ai
still up
2021-06-01
The most magical personal Voice-Led AI English Learning Buddy for Kids · sparkstudio.co
still up
2017-06-01
Enable creators and developers to generate realistic AI personas · d-id.com
still up
2021-06-01
AI CAD Software for Civil Engineering · mach9.ai
still up
2021-06-01
The fastest way to ship airtight AI · openlayer.com
still up
2023-01-01
YC222
the AI social facilitator for offline human to human interactions · 222.place
still up
2016-01-01
AI edited video souvenirs as a service · revl.com
still up
2021-01-01
AI-powered video platform for Internal Comms and HR teams · getspokn.com
still up
2020-01-01
AI estimator & agent for remodelers. · handoff.ai
still up
2023-01-01
Workflow automation, without AI hallucinations. · loopfour.com
still up
2020-01-01
AI powered sensors that save energy, water and emissions · powerx.co
acquired
2020-06-01
AI-native Robotics · nexterarobotics.com
still up
2019-01-01
Talent AI improving quality of hire · searchlight.ai
acquired
2023-01-01
AI-Powered Super Mentor for Test Prep · superkalam.com
still up
2022-01-01
LLM for Legal in Brazil · lexter.ai
still up
2022-06-01
Video AI to automatically detect and respond to production line… · cerrion.com
still up
2020-06-01
AI-native Operating System for Enterprise Ecommerce Companies · hypotenuse.ai
still up
2023-01-01
Automating Healthcare Revenue Cycle Management with AI Workforce · combinehealth.ai
still up
2018-06-01
Database for AI · activeloop.ai
still up
2018-01-01
Edwin is virtual English tutor - an AI-powered service for learning… · edwin.ai
acquired
2020-06-01
Humanloop is the LLM evals platform for enterprises. · humanloop.com
acquired
2022-06-01
Fini | Automate 80% of enterprise support with AI agents · usefini.com
still up
2022-01-01
Rapid medical data annotation · redbrickai.com
still up
2021-01-01
Dramatically better search and ads for marketplaces · promoted.ai
acquired
2019-06-01
Predictive Explorer and Driller for Critical Metal Deposits · earth-ai.com
still up
2018-06-01
We are developing a revolutionary AI-powered augmented reality… · phiar.net
acquired

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.