Y Combinator Winter 2019 (W19) Companies

Our World in Data is a collaborative platform that aggregates and visualizes global statistics and research on development, health, environment, and social issues. The site is maintained by the non-profit Global Change Data Lab in partnership with University of Oxford researchers.

3 investors

OutRival is a no-code AI platform that enables non-technical customer experience teams to create and deploy AI solutions including chatbots, voice agents, and workflow automation for customer interactions. The platform makes AI accessible to businesses seeking to enhance customer experiences without requiring engineering expertise.

4 investors

Overview AI builds AI-powered vision systems that detect manufacturing defects in real-time across production lines, learning and adapting to any product within hours. The system serves manufacturers across automotive, pharmaceutical, and other high-volume production industries globally.

5 investors

Carbon Direct provides science-backed carbon management solutions including advisory services, carbon removal credits, and software platforms for measuring carbon footprints and reduction strategies. The company serves Fortune 500 companies, governments, and private actors.

12 investors

Parker provides banking services through a digital platform.

1 investor

Pengram provides indoor navigation software that uses phone-based mapping to help technicians in fire protection, HVAC, and security locate equipment and devices within buildings.

1 investor

1 investor

Pools.events is a platform for discovering and organizing events across multiple cities in the United States and online. The site allows users to browse upcoming events by location and date, and enables organizers to launch fundraising campaigns for their events and communities.

1 investor

1 investor

Positive manufactures and distributes fresh packaged salads and wholesome food products to grocery stores, hospitals, universities, and workplaces across California.

4 investors

Postscript helps ecommerce brands design and operate SMS marketing programs that engage customers and drive revenue. The company specializes in SMS marketing software with a focus on customer-first product design and ethical practices.

10 investors

Preflight provides a no-code testing platform that automatically generates and maintains web application tests by tracking user interactions and adapting to page changes. The tool supports end-to-end test workflows, chaining dependent tests, and can extract API tests from recorded network activity.

1 investor

Probably Genetic operates a platform for diagnosing genetic diseases, providing comprehensive genetic data and testing to patients and healthcare providers. The company works with patient advocacy groups to connect patients with genetic conditions to diagnostic services and community support.

6 investors

Prometheus Fuels develops systems that convert intermittent renewable energy into liquid fuels for remote electrification. The ULDES and Fuel Forge systems operate independently from the grid, storing energy as liquid fuels when renewable power is available.

6 investors

Pronto is a ridesharing platform that connects passengers and drivers through a mobile app, allowing users to request rides with transparent pricing and offering drivers the ability to earn 100% of their fares without commission.

2 investors

Pulse operates a network of IoT-based smart kiosks called Pulse Active Stations that measure 21 body parameters and assess risk for 12 lifestyle diseases. The kiosks are deployed in high-traffic public locations including malls, hospitals, and transit stations to provide health monitoring for communities.

1 investor

Pyxai offers an AI-powered assessment platform that evaluates candidates on soft skills to help organizations identify talent more likely to succeed and stay in their roles, aiming to improve employee retention and accelerate hiring.

1 investor

Ravn provides embedded engineering squads of senior product engineers to help companies accelerate product development and AI implementation. The service caters to startups, scaleups, enterprises, and product teams seeking dedicated technical talent for core engineering, AI infrastructure, and digital transformation without permanent headcount.

3 investors

rct AI develops artificial intelligence systems for non-player characters in video games and metaverse environments, using deep learning and reinforcement learning to create interactive and adaptive gameplay experiences.

5 investors

Reelables produces smart labels with Bluetooth and cellular connectivity that provide real-time tracking and visibility for shipments, cargo, and inventory across supply chains. The labels emit encrypted signals detected by a network of over 100 million devices and support use cases spanning logistics, healthcare, manufacturing, and high-value goods tracking.

4 investors

ResistanceBio develops treatments to address drug resistance in cancer patients.

2 investors

Rune is a platform that enables users to create multiplayer games through AI chat interactions, with games instantly playable on Rune's mobile app and integrated voice chat. The platform hosts games on its cloud infrastructure and distributes them to over 10 million mobile app users across 150 countries.

1 investor

Sapling provides an API and SDK toolkit that enables developers to integrate language model capabilities into applications for improved communication workflows.

1 investor

Schoolable provides tuition financing for parents and fee collection services for private K-12 schools in Africa, allowing schools to receive a large portion of expected tuition within weeks of term start while parents repay in monthly installments.

4 investors