Y Combinator (YC)

Cloud infrastructure for building and testing software through continuous integration workflows.

Greptile builds an AI code-review and validation platform that checks software changes against the context of a team’s codebase.

Clueso helps business teams create and maintain product videos, training content and accompanying documentation.

Open-source AI models and the Hermes agent, which retains project memory and reusable skills across tasks.

Santé gives wine and spirits retailers one system for in-store sales, e-commerce, delivery orders, marketing and subscriptions.

Vitalize helps hospital teams coordinate staffing and capacity as patient demand shifts.

Training environments and benchmarks that measure how AI agents perform financial services work.

Develops autonomous hypersonic cargo rockets for military micro-payload delivery.

Jeeves provides a financial platform for global businesses, combining corporate cards, cross-border payments, expense controls and treasury tools.

flowscope automates enterprise work by connecting business processes and using AI to reduce repetitive operational tasks.

AI models designed to discover oral medicines for diseases currently treated with injectable drugs.

Hubble Network connects ordinary Bluetooth devices to satellites, extending asset tracking beyond the reach of cellular networks.

AI-powered software that automates sales tax and VAT compliance for global businesses.

A web-data API that turns websites into structured data for developers building AI applications and agents.

Confido connects accounting, finance, sales and operations data so consumer brands can manage deductions, trade spending and supply plans together.

Fast GitHub Actions runners paired with AI agents that optimize continuous integration workflows.

CatchBack turns physical trading cards into a digital mystery-pack marketplace. Customers can open packs, see transparent odds and use trading and instant buyback features that make collectible pricing and resale more accessible.

A monitoring and reliability platform that detects failures in production AI agents, investigates their causes and helps developers prevent repeats.

A health-insurance carrier and digital benefits platform that helps employers offer group plans and supports members in using their coverage and care.

AI agents for banks and lenders that automate routine lending and loan-servicing work across existing systems.

Independent benchmarks that test how well AI models control real robots.

AI video-creation software that helps creators, businesses and teams turn briefs or source media into editable, localized videos.

Blee gives legal, compliance and marketing teams an AI-assisted system to review promotional content against their rules before publication and monitor websites, social media and partner channels afterward.

Stoke Space develops Nova rockets with reusable first and second stages for commercial and government launch customers.

An AI fundraising workspace that helps founders identify investors, research firms and manage venture rounds.

Wafer runs AI inference infrastructure that adapts a model-serving stack to each customer's workload. It benchmarks and tunes models, engines, kernels and available hardware together, then keeps optimizing live serving for latency, reliability and cost as traffic changes.

Kalinda uses AI to help plaintiff-side class action and mass tort firms review case information and qualify potential claims.

An AI actuarial platform that helps companies model and manage risks retained through their own insurance captives.

Open-source healthcare data infrastructure unifying patient records for clinicians

AI platform automating medical coding and revenue assurance for health systems