Y Combinator Winter 2026 (W26) Companies

Palus provides financial strategy and cash management services for early-stage startups, building automated investment portfolios around runway and burn without requiring companies to change banks. The service pairs human financial expertise with automatic execution to optimize reserve cash allocation in compliance with NVCA treasury guidelines.

1 investor

Panta is an insurance broker that specializes in placing commercial insurance for construction, logistics, and manufacturing firms, including high-hazard work that traditional brokers decline. The company offers general liability, property, auto, workers' compensation, cyber, and specialty coverage with a data-driven underwriting approach.

4 investors

Hex provides autonomous AI agents that continuously scan web applications, APIs, and infrastructure to identify security vulnerabilities, replacing traditional periodic manual assessments and static scanners.

1 investor

Patientdesk.ai provides an AI agent that automates appointment scheduling, payment processing, and insurance verification for dental practices, enabling them to fill open slots with profitable patient visits.

2 investors

Pax Historia develops a grand strategy game where players simulate alternate historical scenarios by selecting a country, era, and new chain of events to explore. The platform enables users to design custom maps, scenarios, and characters to play out imaginative what-if situations ranging from historical reimaginings to fictional worlds.

1 investor

Payna provides a software platform that automates licensing filings, renewals, and regulatory correspondence for regulated companies in industries like financial services, replacing manual tracking and external compliance consultant work.

1 investor

Perfectly is an AI-native recruiting agency that automates candidate sourcing, outreach, and coordination for startup hiring teams. The system uses machine learning to identify and contact candidates, learning from feedback to improve over time.

2 investors

Piris Labs develops photonic networking hardware to reduce idle time on AI computing chips and improve the efficiency of AI infrastructure deployments.

3 investors

Pocket is a wearable AI device with accompanying app that captures voice conversations and thoughts, then uses AI models to transcribe, summarize, generate action items, and create mind maps. It serves professionals, creators, and founders who want to record and organize their thoughts hands-free.

4 investors

Pollen builds custom document processing workflows that use AI to extract information from client documents and automatically populate forms for professional firms. The platform maintains human oversight throughout, requiring team review before finalizing any form submissions.

1 investor

Polymath builds simulation environments for training AI agents to perform autonomous tasks over extended periods with minimal human supervision. The company works with leading AI model labs to advance the reliability and capabilities of autonomous AI systems.

2 investors

Polymorph operates a continuous experimentation platform that enables product teams to run thousands of experiments simultaneously across consumer applications. The service helps companies optimize user experiences at scale without increasing headcount, targeting product managers and designers building consumer internet products.

1 investor

A telemedicine platform offering AI-assisted diagnosis and consultations, with on-demand access to licensed physicians for $39 per visit. Serves patients seeking healthcare advice and treatment.

1 investor

Protent supplies video analysis software that detects escalating incidents and threat patterns in real time, enabling law enforcement and security personnel to prioritize responses and intervene early.

1 investor

Proximitty builds AI agents to automate commercial lending workflows for banks, including document ingestion, financial analysis, covenant monitoring, and loan servicing for C&I, CRE, and SBA loans. The company targets mid-sized lenders seeking to reduce manual underwriting and servicing work.

3 investors

Q2Q is an AI platform that automates deal sourcing and outreach for acquisition teams, helping them identify target companies and book first meetings with company owners.

1 investor

Ramain provides agentic process automation that uses AI agents to automate manual UI tasks across web and desktop applications by visually interacting with screens, eliminating manual data entry and system handoffs. The platform targets enterprise teams working with disconnected legacy systems and web portals that lack API integrations.

1 investor

Reframe operates a marketplace where hardware teams source both commercial off-the-shelf and custom manufactured components, leveraging relationships with suppliers experienced in producing parts for established consumer hardware products and using AI agents to automate the procurement process.

1 investor

Remix is a mobile app that allows users to remix videos by pasting video links, adding photos, and instructing the app to make edits. It serves content creators and social media users who want to easily modify and customize video content.

2 investors

Ressl AI provides a platform for training, benchmarking, and deploying autonomous agents in production business systems. The product serves teams developing AI agents that need to move from prototype to operational deployment.

2 investors

REV1 develops AI-powered software that automatically converts 3D CAD models into production-ready 2D engineering drawings with geometric dimensioning and tolerancing annotations for mechanical engineers.

1 investor

Revion builds software tools for automotive technicians to automate routine tasks like inspection documentation and repair information lookup. The platform helps technicians in automotive service departments reduce administrative work and improve operational efficiency for the $1.2 trillion US automotive service sector.

1 investor

Rhizome AI provides an AI research platform that answers regulatory and clinical questions by citing documents from health authority databases across multiple markets, with built-in hallucination prevention. The product serves pharmaceutical companies, consultants, and researchers who need to understand regulatory positions and guidance from FDA, EMA, and other regional authorities.

1 investor

Ritivel builds an AI-native platform that automates regulatory workflows and documentation for life sciences companies, helping accelerate the submission of therapies to patients.

1 investor