Discover the next generation of startups.

Advanced Metal Research

YCombinator

Machine intelligence for American Welding

America does not just need more welders. It needs welding knowledge that can scale. The American Welding Society projects 320,500 new welding professionals will be needed by 2029, with about 80,000 jobs to be filled annually from 2025 to 2029. More than 157,000 current welding professionals are approaching retirement. Welders are only a small share of the skilled-trades workforce, but welding accounts for an outsized share of projected capability demand. The market calls it a labor shortage. AMR sees a learning bottleneck. We are building American-made robotic welding cells that combine computer vision to provide real-time seam tracking and post-weld inspection to turn welding from a scarce manual process into a closed-loop manufacturing system that learns from every weld as it happens.

Aemon

YCombinator

The Forward-Deployed AI Research Engineer

Aemon is the first autonomous research engineer that delivers state-of-the-art solutions to your engineering problems. It generates, tests, and evolves thousands of approaches at machine speed to discover optimal solutions beyond what human experts can find. Aemon already set a new world record on an NP-hard math optimization problem with <$10 of compute, beating the previous record set by Google DeepMind in 2025. Ray and Richard (twin brothers) dropped out of UWaterloo and UIUC to build Aemon. They published at top AI conferences like ICLR and EMNLP before turning 20.

AgentPhone

YCombinator

Phone Numbers for AI Agents

The $2T global telecom industry was built for humans. Agents can't act in the real world today because without a phone number, they lack identity. AgentPhone gives every AI agent its own phone number to reach people and businesses through messages and calls.

AgileMD

YCombinator

Predictive analytics and clinical pathways for hospitals

At AgileMD, we are building the most advanced real-time predictive analytics and clinical algorithms platform for hospitals. Our cloud-based engine helps thousands of doctors and nurses around the country make medical decisions, so that every patient receives the highest quality and value of care based on the latest medical knowledge and data.

Agnost AI

YCombinator

Product analytics for teams building conversational agents

Agnost AI helps teams building chat and voice AI agents understand what users want, where they get stuck, and why they drop off. We read production AI conversations, cluster recurring intents, feature requests, frustration, and failure patterns, then open PRs against prompts, tools, and harnesses to improve the agent.

AICE

YCombinator

Submarine drones for defense

We are building the next generation of underwater defense systems: autonomous swarms of modular marine drones to secure naval assets and coastal infrastructure against evolving underwater threats.

Airbnb

YCombinator

Book accommodations around the world.

Founded in August of 2008 and based in San Francisco, California, Airbnb is a trusted community marketplace for people to list, discover, and book unique accommodations around the world — online or from a mobile phone. Whether an apartment for a night, a castle for a week, or a villa for a month, Airbnb connects people to unique travel experiences, at any price point, in more than 33,000 cities and 192 countries. And with world-class customer service and a growing community of users, Airbnb is the easiest way for people to monetize their extra space and showcase it to an audience of millions. No global movement springs from individuals. It takes an entire team united behind something big. Together, we work hard, we laugh a lot, we brainstorm nonstop, we use hundreds of Post-Its a week, and we give the best high-fives in town. Headquartered in San Francisco, we have satellite offices in Dublin, London, Barcelona, Paris, Milan, Copenhagen, Berlin, Moscow, São Paolo, Sydney, and Singapore.

AirHelp

YCombinator

AirHelp helps air passengers get compensation for delayed, cancelled…

We help get compensation for air passengers that have experienced delayed, cancelled, and overbooked flights. We make the claim process much faster, easier and less painfull because the airlines won't. We love new challenges! As a start-up, we’ve been through it all and thanks to this our AirHelpers have developed the skills to deal with it all, and more, all while remaining passionate about what we do – helping ordinary people – as flight delays can happen to anyone. What helps us continuously develop, is our combination of talent, passion and persistance. What makes us different? Every single one of our employees can make an impact on the future of AirHelp – come up with an innovative idea – and we’ll help you implement it at AirHelp. This is an experience you can gain in very few places! If you’re looking to develop new skills, make an impact on not only global business, but ordinary, everyday travellers, and take risks developing and implementing new projects – what are you waiting for? Come join us today! With a variety of departments to choose from: tech, product, legal, finance, human resources, customer service (and the list goes on!) - you don’t have to narrow your horizons, just take your pick. Pick what you’ve got a knack for, and most importantly, what you enjoy! AirHelp. We're here to help!

Akido Labs

YCombinator

Rebuilding healthcare with AI at the core

For the first time in history, technology exists to create a healthcare system that anticipates your needs, responds with precision and is accessible to everyone -- regardless of financial means or geography. Since 2015, Akido Labs singular focus has been to make this vision a reality.