Y Combinator Fall 2025 (F25) Companies

Parametric builds software for physical businesses to operate autonomously. The company is a public benefit corporation based in San Francisco.

2 investors

Parrot is a mobile app for learning Spanish through short-form video content created by native speakers, using comprehensible input methodology. The app combines immersive video viewing with speaking practice and spaced repetition vocabulary review for learners at all levels.

2 investors

Parse provides an API platform that converts web actions and data retrieval from any website into single API calls without running a browser. The service targets developers and AI agents, offering pre-built APIs, the ability to create custom APIs from URLs in minutes, and automatic monitoring and repair when source sites change.

1 investor

PatentWatch.ai provides AI-powered analysis and claim chart generation for patent documents, helping with patent prosecution and analysis workflows. The platform accelerates the creation of claim charts by analyzing patent claims against evidence and technical specifications.

4 investors

Efficient Systems builds Perseus, a retrieval engine that helps coding agents locate and read code in large codebases by meaning and structure. The tool indexes working trees including uncommitted edits and provides fast, cited results for AI agents and code editors.

1 investor

Philon develops open-source robots designed to handle hazardous, repetitive, and unengaging work across general applications.

1 investor

Piggy Robotics develops humanoid robots with artificial muscle actuators powered by a single pump, designed for mass production at consumer price points to perform household tasks.

1 investor

Pixley AI provides a platform that converts children's drawings and story ideas into animated cartoons within minutes, incorporating social-emotional learning themes selected by parents. The company also offers Pixley Studios, a service that uses the same technology to help brands and content creators produce video content.

1 investor

Play Health builds a clinical decision-support platform for healthcare providers to deliver personalized menopause and women's health care. The platform serves primary care physicians and other providers treating women navigating perimenopause and menopause.

1 investor

Primer automates personalized product demos for sales teams to accelerate deal closure and scaling. The platform targets companies seeking to optimize their sales demo process with minimal manual effort.

1 investor

Prox provides an AI product specialist for manufacturers of complex physical products, grounded in their manuals and deployed on product pages, dealer portals, internal tools, and AI platforms like ChatGPT and Claude. The system enables product discovery, customer support, configuration, and knowledge capture for manufacturers across industries like powersports, agriculture, HVAC, and construction equipment.

1 investor

1 investor

Remedy provides AI agents that automate pharmacy workflows including prescription refills, inbound patient calls, and data entry within existing pharmacy management systems. The platform serves retail pharmacies and handles tasks such as e-script processing, refill requests, insurance inquiries, and appointment scheduling.

1 investor

Rivet is a visual editor that lets product designers make UI changes and commit them directly to code, reducing the need for designer-engineer collaboration.

1 investor

Rovi provides members with access to clinician guidance for navigating healthcare, finding quality doctors, managing benefits, and coordinating care. The platform connects patients with nurses and specialists to improve health outcomes and reduce costs.

2 investors

Rovr is an AI orchestration platform for field delivery engineering, IT consulting, and professional services teams that automates the capture of customer requirements, work structuring, and project delivery. It integrates with Slack, Linear, and GitHub to convert customer conversations into tickets, generate documentation, and accelerate implementation timelines.

1 investor

S2.dev builds infrastructure services and tools for developers. The company focuses on providing a platform for application development and deployment.

3 investors

Sava builds software related to trusts.

3 investors

Sciloop builds datasets and solutions for frontier AI models by connecting a global network of expert mathematicians, physicists, computer scientists, and domain specialists to solve complex problems that current AI cannot address.

1 investor

Scoop converts scientific and manufacturing data into dynamic regulatory documents for drug submissions, using AI to continuously reconcile updates and maintain consistency across filings for pharmaceutical companies and regulatory teams.

2 investors

Scott is an alignment layer for software development teams that connects design intent to code through planspaces and code-grounded design reviews. The platform enables teams to define specifications, collaborate on approval, and delegate complete context to AI coding agents, reducing misalignment, rework, and token costs.

3 investors

Selfin provides a platform where users consolidate their financial accounts and receive AI-generated personalized recommendations for optimizing their finances.

2 investors

SellRaze is a mobile application that enables secondhand sellers to create product listings quickly across multiple online marketplaces (eBay, Poshmark, Depop, Mercari) using AI-powered tools for pricing and inventory tracking. The platform serves individual sellers and resellers who want to sell used items efficiently across multiple channels from a single dashboard.

3 investors

Semble AI develops AI agents customized to a company's specific operations and integrated with its existing software and tools, targeting trades businesses.

1 investor