Y Combinator Winter 2019 (W19) Companies

An AI-native biotech company that combines multimodal data, AI models, and high-throughput lab automation to discover small and large molecule therapeutics. Its infrastructure supports AI-enabled drug discovery across multiple therapeutic modalities.

8 investors

54gene is an African genomics company offering research, services, and development focused on including under-represented African genomic data in medical research. It aims to support medical breakthroughs and new healthcare solutions, with a focus on Africans and the global population.

10 investors

BoardRE is a mortgage company that acts as an intermediary cash buyer of homes, purchasing a property on behalf of mortgage-qualified homebuyers so they can make all-cash offers and close quickly before finalizing their own mortgage. It serves homebuyers, sellers, and real estate agents, working with national lenders to assess buyer creditworthiness upfront.

2 investors

AccioJob provides online and offline skill training courses in software development and technology, with mentorship and job placement support for students seeking roles at Indian tech companies.

1 investor

Adventurous Co offered curated travel experiences, described as a blend of Disney and Airbnb Experiences. The company was based in San Francisco and participated in Y Combinator's Winter 2019 batch, but is now inactive.

1 investor

AI Insurance provides a software platform that small-to-midsize insurance companies use to manage their operations, replacing spreadsheets and manual filing with a centralized system aimed at reducing administrative costs. It targets the insurance industry, positioning itself as an operations platform for insurers.

3 investors

Allo is a mobile app that connects neighboring families so they can coordinate social and practical support, helping them build a local community or "village." It serves families and neighbors looking to exchange favors and establish real-world connections.

1 investor

AllSome offers a Fulfillment-as-a-Service platform that helps Southeast Asian e-commerce sellers run their own order fulfillment operations. It focuses on logistics and shipping for online sellers in the Southeast Asia market.

4 investors

Allure Systems develops generative AI technology that produces product images for fashion retailers, allowing brands to generate variations of apparel photos on different models and sizes without requiring physical photoshoots. The software helps online retailers improve conversion rates by enabling cost-effective, scaled image production for eCommerce product pages.

5 investors

Alpaca provides an API-first brokerage infrastructure and licensed financial services that let developers and businesses embed stock and crypto investing into their own products for their end-customers. It operates with a globally distributed team and works with over 100 companies worldwide.

16 investors

AmpUp offers an EV charging software and management solution for private commercial locations with long vehicle dwell times, such as workplaces, multi-unit dwellings, and fleet depots. The company operates in the commercial Level 2 EV charging market in the United States.

8 investors

Ascen provides a back-office platform and employer-of-record (EOR) service for staffing firms, handling payroll, HR, and compliance functions. It serves the staffing and recruiting industry.

2 investors

Ashby builds recruiting software that bundles an applicant tracking system, sourcing, scheduling automation, and recruiting-specific analytics. It targets operationally minded hiring and recruiting teams.

8 investors

Askdata offers a natural-language interface that lets users connect their apps and data sources and ask questions in plain language to get personalized data insights. The product is a search-driven analytics tool; the company was acquired by SAP in 2022.

2 investors

Atlas is a membership card and app that provides access to reservations at high-end restaurants, luxury hotels, sold-out concerts, and sporting events for members. The service targets affluent consumers seeking exclusive experiences and bookings.

14 investors

Atomic Alchemy builds privately-owned nuclear reactors dedicated to radioisotope production, including Molybdenum-99 used in most nuclear medicine procedures. It aims to supply radiopharmaceutical materials for diagnostic imaging, biological tracers, and cancer treatments.

8 investors

Aura Vision provides in-store analytics for physical retail by using retailers' existing security cameras with plug-and-play AI to measure customer behavior and store performance. It functions as an analytics tool for retail stores, comparable to web analytics but for brick-and-mortar locations.

6 investors

AuroraQ is building an integrated quantum computing system that combines specialized quantum components for processing, communication, and memory into a single machine. The company sources components from partners to assemble a practical quantum computer.

1 investor

Avalanche provides a software development kit for building referral programs, aimed at startups. It operates in the marketing technology category.

3 investors

Avo is a data quality platform for product analytics that helps teams plan, implement, and monitor their analytics tracking. It offers tracking plan management, data validation, and an analytics release workflow for PMs, developers, and data scientists.

7 investors

AXDRAFT provides software that helps corporations draft, negotiate, and approve legal documents by turning copy-and-paste drafting into a guided Q&A process. The platform integrates data from public registers and internal databases and offers data validation, e-signatures, access control, and document tracking for corporate legal teams.

2 investors

Axel finds private flight and hotel rates for travelers and continues monitoring for price drops after booking to capture additional savings. It supports both direct use and AI agents that can search prices and assist with booking.

1 investor

Balto provides contest automation software that reduces the manual work of running player contests, offering tools to manage, track, and communicate with hundreds or thousands of participants. The company was acquired by FuboTV (NYSE: FUBO).

2 investors

Basement operated a social network designed for connecting with close friends. The company was part of Y Combinator's Winter 2019 batch and is now inactive.

1 investor