Happenstance exists to create 10x more of this kind of luck in the world. Backed by Garry Tan and Elad Gil, we've built the world's best AI person search by a wide margin. No more keyword search; just describe the kind of person you're looking for. We're already used by 1000+ YC alums to accelerate their customer development, sales, and fundraising.

Happy Returns is solving one of e-commerce’s biggest pain points: returns. We combine proprietary returns software with reverse logistics, including box-free consolidated returns, to make returns better for shoppers, retailers, and the planet. We’re a UPS company, growing quickly, and our shopper experience has a 93 NPS.

At Happy Scribe we think audio & video should be universally accessible. We want to scale high-quality subtitles & dubbing with a multi-player editing experience that combines state-of-the-art AI with a global marketplace of proofreaders. 100% bootstrapped and profitable, we have a product used by +400k/mo users with high 7-digit revenue.

Hardfin is a B2B software platform for equipment manufacturers that enables them to track their assets and manage projects for their hardware.

We're building a regulatory intelligence platform for AI in healthcare. In effect a specialist dataset + search engine for that information. Currently working to get from a Beta to production ready.

Harmonic is a telecom hardware vendor building hardware for DOCSIS cable, PON fiber and mixed deployments. We create solutions for MSOs and network operators with a focus on hardware and deployment configurations.

The AI operating system for American manufacturing — an AI layer that runs your plant on real-time data, connecting machines, software, paperwork, and tribal knowledge. We embed on factory floors. Many roles are deployed: you relocate to a plant and ship inside the environment it runs in. High ownership, high equity, founder-led.

Harmony Intelligence is building a defensive AI AppSec agent to protect mission-critical software from AI cyberattacks. They have recently raised $3M for this purpose.

HarperDB is an innovative software company that recently secured significant series A funding. HarperDB’s platform combines database, caching, application, and streaming functions into a single technology to improve performance and reduce costs for Fortune 100 companies.

Hartwig Medical Foundation is developing a diagnostic whole genome sequencing test for tumors to speed-up the uptake of personalized cancer treatments for patients in the Netherlands. They are building an algorithm that integrates molecular and clinical data to create comprehensive treatment reports.