Y Combinator Winter 2025 (W25) Companies

Browser Use provides AI-powered browser automation infrastructure with anti-detection capabilities, CAPTCHA solving, and custom LLMs designed for web-based agent tasks at scale.

7 investors

Bud is an AI-powered autonomous worker that uses a computer, browser, and coding capabilities to complete tasks independently. It serves businesses and individuals looking to automate repetitive work across various applications and workflows.

3 investors

Butter builds bVisor, a lightweight sandbox runtime for AI agents that runs locally within application processes, providing a secure bash environment without virtual machines or remote infrastructure.

1 investor

Bystreet provides a database of independent hotel properties and ownership contact data across the Caribbean and Latin America, serving hotel brands, operators, and suppliers seeking business development opportunities.

1 investor

Calltree develops AI agents that handle inbound voice calls and chat messages for call centers, with the ability to access internal enterprise systems such as custom CRM platforms and dashboards.

1 investor

Candor provides a data loss prevention (DLP) platform that uses AI to detect insider risks by analyzing user behavior and data movement patterns, surfacing only genuine security threats to organizations.

1 investor

Candor provides AI-powered agents that help defense and deeptech companies identify and pursue government funding opportunities, compressing the application process from weeks to days.

1 investor

Cardamon provides regulatory compliance software for compliance and legal professionals. The company helps streamline compliance processes and regulatory management through its platform.

1 investor

CareCycle builds an AI-native retention operating system for Medicare and ACA insurance agencies, combining AI-driven member engagement with licensed agent oversight. The platform automates routine member communications and handoff to agents for complex decisions, enabling agencies to maintain consistent member relationships without scaling headcount.

1 investor

Caseflood.ai provides intake software for high-end law firms, helping them manage client onboarding and case intake processes.

3 investors

Cedar provides sales automation software that helps account executives reduce administrative work on CRM tasks and deal management, allowing them to focus on selling for high-growth companies.

1 investor

Cenote offers AI sales agents that contact direct-to-consumer online shoppers via phone and text to guide purchase decisions and recover abandoned transactions. The service addresses conversion gaps in e-commerce by maintaining ongoing conversations with potential buyers across multiple channels.

1 investor

Cifrato provides automated invoice processing and accounting reconciliation that integrates with ERP and POS systems. The platform uses AI to process invoices and synchronize accounting data for companies.

1 investor

Closure develops AI technology for law enforcement, focusing on tools designed around the needs of police departments and their personnel.

6 investors

Confident AI is a platform for evaluating, monitoring, and governing AI systems in production. It enables teams to standardize testing practices, track quality and latency metrics, and enforce governance policies across multiple AI initiatives.

2 investors

Conntour provides a platform that allows security teams to search, monitor, and query video footage from thousands of cameras using natural language commands, enabling features like historical footage search, real-time alerts, and data extraction without requiring pre-configured detection rules.

2 investors

Contrario is a recruitment platform that uses AI agents and a network of expert recruiters to source and deliver qualified candidates to companies. It integrates with existing ATS systems and handles candidate screening, scheduling, and coordination to reduce hiring time and overhead.

2 investors

CopyCat builds AI-powered document automation software for insurance brokers, automating the creation of proposals, risk analysis documents, and employee benefits workbooks while preserving agency workflows and templates. The platform helps commercial and personal lines brokers reduce administrative work and serve more clients.

1 investor

Corsair is an open-source SDK and integration platform that enables applications to connect to third-party services without maintaining underlying infrastructure, with permission-based approval workflows and self-hosted deployment options.

1 investor

Cuckoo is an AI-powered real-time translator that works within video conferencing, chat, and communication platforms to enable multilingual conversations for global teams. The platform serves organizations in sales, marketing, and support roles who need to communicate across languages and regions.

1 investor

Dalus provides a collaborative systems engineering platform for hardware development teams to model complexity, manage requirements, and preserve engineering knowledge using SysML v2. The platform offers requirements management, system architecture design, analysis & verification, and AI-powered capabilities for engineering teams in regulated industries.

2 investors

Dartboard Energy processes raw alarms and state data from industrial systems into classified events with audit trails, eliminating manual log reconstruction for energy and industrial operations. The platform reads data from data lakes, historians, and energy management systems, then writes structured events back to existing workflow tools.

1 investor

Delineate builds AI agents that help pharmaceutical companies design clinical trials more quickly by converting existing trial research into specialized datasets, reducing the time scientists spend on trial preparation.

2 investors

Dex is an AI-powered workspace assistant that ingests operational data across a user's tools and integrations, organizing it into structured context and a knowledge base. It automates tasks, generates insights, and proactively maintains information while users work across their browser and connected applications.

1 investor