Y Combinator Winter 2026 (W26) Companies

Robby provides software tools for home service companies to help technicians educate homeowners and close sales during service visits. The platform addresses communication barriers that prevent homeowners from understanding repair needs and replacement opportunities.

1 investor

RoboDock builds autonomous robotics systems for electric and autonomous vehicle depot operations, automating charging, plug insertion, and vehicle inspections. The company serves fleet operators managing mixed EV and AV fleets in ports, logistics yards, and urban charging facilities.

1 investor

Ruma provides prior authorization software for healthcare practices, helping clinics manage and scale authorization requests across multiple locations. The platform serves medical and pharmacy benefit authorizations for healthcare providers.

1 investor

RunAnywhere is a research-first inference lab that hand-writes GPU kernels and develops SDKs to accelerate large language model inference on consumer silicon, particularly Apple devices. The company provides inference runtime software and open-source tools for developers deploying AI models on mobile and edge devices.

1 investor

Salus is a policy-aware proxy that intercepts and manages AI agent actions, allowing, clarifying, repairing, or escalating tool calls without requiring changes to the underlying agent or stack. It serves developers and teams building AI agents across LLMs and agentic frameworks.

1 investor

Samora provides an AI voice platform that enables automated outbound calling in 20+ languages with natural conversation capabilities. The platform serves organizations needing to reach stakeholders at scale, including those in development contexts with low connectivity.

1 investor

SchedulingWiz builds automated physician scheduling software for hospital departments and medical institutions. The platform creates resident, fellow, and attending schedules for specialties including neurology, emergency medicine, and surgery.

1 investor

Seeing Systems develops intelligent unmanned systems and autonomous drone platforms for advanced defense applications, combining AI and robotics expertise to deliver cost-effective solutions for training and contested military operations.

1 investor

Sentrial builds a monitoring and debugging platform for AI agents and products in production, detecting issues like infinite loops and hallucinations while providing diagnostics and remediation recommendations to development teams.

1 investor

Sequence Markets provides infrastructure for executing trades across cryptocurrency exchanges, prediction markets, and tokenized asset platforms from a single interface, using proprietary low-latency routing technology to consolidate market data and order placement.

1 investor

Servo7 develops AI control software for robots that learns from demonstrations to automate repetitive tasks, including in regulated industries like military and healthcare. The platform replaces traditional pre-programmed control methods with machine learning to reduce programming complexity.

1 investor

A video dataset company that provides cleaned, segmented, and labeled video content from millions of hours of footage for AI model training. The platform serves AI research labs and development teams.

1 investor

ShortKit provides an SDK and infrastructure platform for building and scaling short-form vertical video applications. The platform offers video player mechanics, transcoding, content management, analytics, and monetization features for publishers and media companies.

2 investors

Return Signals operates a two-way iMessage communication platform for DTC ecommerce brands, enabling customer support and personalized sales conversations before and after purchase. The service drives repeat purchases, cross-sells, and retention through AI-powered conversations that integrate with existing commerce and support systems.

1 investor

Sila provides AI tools designed to increase company productivity. The company works with large enterprises in private beta and is preparing a major product launch.

1 investor

Sitefire provides a marketing platform that helps brands increase their product visibility to AI agents and LLMs by generating and optimizing content discovered by these systems.

1 investor

A platform that centralizes agent sessions across different AI agents, enabling users to share sessions via URL and extract successful workflows into reusable skills. It works with Claude Code, Hermes, and any agent that maintains a transcript.

1 investor

Sparkles provides a platform for teams to run AI coding agents that connect to GitHub repositories and generate pull requests. The service integrates with 3,000+ tools including Slack, Linear, and Jira, allowing teams to automate code changes through multiple agent options in isolated cloud sandboxes.

3 investors

Paysponge provides financial infrastructure for AI agents, enabling them to hold, spend, and earn money through credit cards, bank accounts, and crypto. The platform offers both agent accounts and a payment gateway for businesses to accept payments directly from agents.

2 investors

SpotPay is a financial services platform offering a digital wallet, international money transfer, and a debit card (Calypso Card) for global spending. It serves individuals who need to hold, send, and spend money across borders.

2 investors

Squid provides AI-powered software for planning and operating electricity grids, helping network teams make better decisions through a unified network model. The platform targets utility operators and grid planners who need modern planning tools.

2 investors

Stilta builds software for patent protection and intellectual property work, serving patent attorneys and innovators who depend on patent safeguards. The platform helps practitioners manage and strengthen patent cases across AI, biotech, clean energy, and autonomous systems.

1 investor

Strand AI predicts missing biological data modalities from existing patient data, converting single histopathology slides into spatial protein maps and inferring gene expression from genotype. The platform serves researchers and clinicians in computational pathology and genomics.

1 investor

Supafax is an AI email assistant that learns a user's writing tone to compose replies, prioritizes inboxes, schedules meetings, and automates routine email tasks through natural language commands. It serves professionals and organizations relying on email for business operations.

1 investor