Discover the next generation of startups.

Huscarl

YCombinator

AI-native actuary enabling self-insurance for corporations

Huscarl is building an autonomous AI actuary to enable self-insurance for corporations. Large companies use insurance subsidiaries ("captives") to self-insure their risks. Some of these captives are larger than regional insurers. We provide them the actuarial and modeling layer to operate and grow. We're building a future where self-insurance is the default, and commercial insurance the exception. This is the best way to solve the inefficiencies of the $1T corporate insurance market.

Hypercubic

YCombinator

Agentic AI for Mainframe Operations and Modernization

Hypercubic is an AI-native platform for mainframe operations and modernization. We help enterprises understand and modernize their mission-critical legacy systems. About 70% of the Fortune 500 companies still rely on them to run their core business applications in banking, insurance, telecom, airlines, retail, and more. These systems, originally built in the 1960s–90s, still power trillions in global infrastructure today but have become increasingly opaque as original developers retire or leave the workforce. We are pioneering a new class of intelligence capable of understanding, reasoning about, and rebuilding the world’s foundational infrastructure. Learn more at hypercubic.ai

Hyperpad

YCombinator

Create, Share, Play Mobile Games on the iPad.

Hypercard for iPad. Allows non-technical people to create media rich interactive apps like mobile games then publish them to the App store as native apps with out writing a single line of code.

HyperProbe

YCombinator

Your coding agent writes code. Now let it fix prod too.

If your team uses Cursor, Claude Code, or Codex to ship, you've felt it: the AI is great at writing code, mediocre at debugging it. When something breaks in prod, you're back to grepping logs, adding console.logs, redeploying, and hoping the AI's guess is right. HyperProbe fixes this. Your coding agent dynamically drops non-breaking probes into your running services, straight from your IDE. When a probe fires, HyperProbe captures and sanitises the exact variable state, feeding your agent real evidence instead of flat logs. This fixes prod incidents in minutes from the exact same window where agents write code, without ever redeploying to add a print statement. Under 1% CPU overhead. Automatic PII redaction. Built for backend teams shipping AI-written code today. Install in 60 seconds, see your first investigation in 10 minutes. That's why we call HyperProbe the runtime data layer for AI-native software.

Icarus

YCombinator

Stratospheric birds for defense

Icarus is building the modern-day U-2 spy plane. Our autonomous solar aircraft fly at 60,000 feet for weeks at a time, eventually months and years, above weather and below satellites. They deliver persistent intelligence and connectivity for the military at a fraction of the cost of existing systems. The stratosphere is the forgotten frontier.

Idler

YCombinator

Reinforcement learning environments.

Idler builds reinforcement learning environments that teach AI models to code at expert human levels. We create training environments based on real-world coding scenarios that prepare models for the complex challenges they'll face in production.

Illume Labs

YCombinator

24/7 Personal Health & Longevity Companion

Illume is a 24/7 AI personal health & longevity companion that connects your wearables, blood panels, and genomic data to text you personalized and actionable insights. We pull in your health data and fuse it into one secure model. You get daily text updates on what changed, what it means, and what to do next; conversational health Q&A like "What should I do to improve my bloodwork?"; cross-data trend detection that catches patterns individual platforms miss; and a full platform to dig deeper, explore your health data, and text your Illume agent anytime. We're 3 MIT grads & friends, with experience at Windsurf, MIT CSAIL, Eli Lilly, & the Broad Institute.

Imagine AI

YCombinator

We reverse engineer B2B growth, starting with LinkedIn.

Imagine AI is a research and software company reverse engineering modern B2B growth, starting with LinkedIn. We build coordinated content systems for executive teams, where the CEO, VP of Sales, and Head of Marketing post aligned narratives from a single calendar, producing compounding reach that single-founder posting cannot reach. 50+ B2B companies are now using Imagine AI, including MongoDB, Rippling, Slash, and Corgi Insurance. Customers have generated $31M in attributed revenue, 12M impressions, and 1,400 hours of executive time saved.

Immunity Project

YCombinator

The free HIV vaccine.

We're developing a free vaccine to cure HIV and AIDs. Immunity Project is a non-profit initiative dedicated to developing an HIV vaccine. We hacked the HIV life cycle to develop a vaccine that gives you the same power as HIV controllers. With success in our clinical trials, our goal is to give our vaccine away to the world for free.