Y Combinator Winter 2025 (W25) Companies

10x provides an AI-powered back-office service that automates dental practice operations including hygiene recall outreach, treatment follow-up coordination, and missed-call answering. The system uses conversational AI to contact patients via text or phone and book appointments directly into practice management systems.

1 investor

a0.dev provides a platform that generates React Native projects to accelerate mobile app development for developers. The service aims to reduce typical development timelines by automating project scaffolding and boilerplate code generation.

2 investors

A platform where users create and share AI-powered tools, games, chatbots, and interactive experiences with others in their social network.

1 investor

Adam is an AI agent that connects to CAD software, PLM systems, and supplier tools to automate hardware engineering workflows like BOM management, design reviews, sourcing, and RFQ generation. It serves hardware engineering teams and operates across Onshape, SolidWorks, Fusion, and other existing tools without requiring data migration.

2 investors

AfterQuery is an applied research lab that curates training data solutions for foundation model development by capturing expert reasoning and decision-making processes. The company works with domain experts to transform real-world professional work into structured datasets that teach AI models how to solve complex problems through step-by-step reasoning rather than just outputs.

3 investors

Agentin builds an AI system that automates revenue and spend workflows across enterprise software systems like SAP, Salesforce, and NetSuite, replacing manual coordination with autonomous agents that monitor and fix financial transactions.

2 investors

Alice is an AI-powered study platform that combines leading language models with a proprietary learning system to help students understand, retain, and perform better on exams. The platform serves students across all academic levels from primary through master's students, with particular focus on university students with text-heavy courses.

1 investor

Altrina provides intelligent automation software for regulated enterprises, specifically healthcare and legal back offices, that executes processes across fragmented systems and maintains compliance.

2 investors

Amby is an AI coaching app that delivers personalized training plans via text messages, integrating data from Strava, Garmin, and Apple Health to provide proactive check-ins and coaching for endurance athletes. The service focuses on recovery monitoring, training load management, and athlete guidance without requiring a dedicated app interface or new hardware.

2 investors

Archon provides compliance services that accelerate the federal authorization process for software vendors selling to government agencies, reducing typical timelines and associated expenses.

1 investor

Artifact is a collaborative ECAD (electrical CAD) design tool for managing complex electrical systems. It enables teams in design, manufacturing, and procurement to collaborate in real-time while automatically generating harness drawings, pin tables, and BOMs, with support for version control, electrical verification, and multi-layered system views.

3 investors

Societies creates AI-powered simulations of human personas and attitudes to enable market research, audience analysis, and consumer insights at scale. The platform synthesizes real-world audience data with artificial intelligence to help businesses understand decision-makers and validate strategies.

4 investors

Assistant-ui is an open-source React library that provides pre-built components and state management for building AI chat interfaces. It enables developers to integrate ChatGPT-style conversational UIs into applications with support for streaming, multi-turn conversations, and integration with LLM providers like LangChain and Vercel AI SDK.

1 investor

Asteroid provides a HIPAA-compliant platform that automates workflows across healthcare systems lacking public APIs, including EHRs, payer portals, and government registries through browser automation and AI agents. The platform reduces manual data entry and integration maintenance work for healthcare software companies and payers.

4 investors

Astro acquires land and secures grid connections for renewable energy projects, then sells the developed sites to larger energy companies. The company uses machine learning to identify grid connection points that reduce cost overruns in renewable project development.

1 investor

AthenaHQ builds AI-powered search technology for e-commerce and digital marketing. The company is led by former executives from Google Search, DeepMind, and ServiceNow.

2 investors

Awen is an AI platform that enables creative professionals to generate visual content including design, photography, and video from natural language conversations. The platform serves designers, photographers, and video creators seeking to accelerate their production workflow.

2 investors

Axal deploys AI agents connected to enterprise ERPs to automate order entry, customer inquiries, and sales tasks for manufacturers and distributors. The platform reduces manual data entry and improves accuracy across revenue, finance, and operations workflows.

3 investors

Axiom is a decentralized finance platform where users can trade memecoins and perpetual contracts while generating yield on their holdings.

1 investor

Bezel provides AI-powered software that generates photorealistic fashion product imagery and videos for e-commerce and marketing use. The platform enables fashion brands and creators to create on-model apparel photography without physical photoshoots.

1 investor

Bild.ai extracts door schedules, frames, and hardware specifications from building plans and construction documents. The platform automates the mapping of doors to hardware sets and specifications for construction teams.

1 investor

Bindwell develops pesticides using artificial intelligence and machine learning to address crop loss and pest resistance. The company combines computational models with laboratory assays to design more selective and effective agricultural chemicals for farmers.

1 investor

BlindPay provides a payment infrastructure platform that orchestrates stablecoins, local payment rails, virtual accounts, and compliance for global financial transactions. The company serves developers and companies building payment functionality, offering SDK-based fiat gateway integration with low fees and minimal on/off-ramp delays.

2 investors

Bluebook provides AI agents that handle research, reconciliations, and month-end closing work for accounting firms, enabling each professional to manage a significantly larger client base and freeing time for strategic advisory work.

1 investor