Y Combinator Winter 2019 (W19) Companies
192 companies from the Y Combinator Winter 2019 batch, with their investors and founders.
1910 develops an AI platform that integrates multimodal data, frontier AI models, and high-throughput lab automation to accelerate drug discovery and development for pharmaceutical companies. The platform targets undruggable targets and aims to improve R&D productivity in the biopharma industry.
2 investors
54Gene conducts genomics research and provides related services to increase the representation of African genetic data in medical research, which aims to advance healthcare solutions globally.
5 investors
Accept.inc acts as an intermediary cash buyer in residential real estate transactions, purchasing homes on behalf of buyers who will obtain mortgages later, allowing sellers and agents to close sales quickly while buyers secure properties at market rates without conventional financing delays.
1 investor
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
1 investor
AI Insurance provides software for policy, insured, and claims management in the specialty insurance sector. The platform serves program managers, MGAs, TPAs, and other intermediaries with configurable tools for automating insurance operations.
3 investors
Allo is a mobile app that enables neighbors and nearby families to coordinate support and assistance for each other through a shared local network.
1 investor
AllSome provides fulfillment services for Southeast Asian e-commerce merchants, handling inventory management and order shipment on a pay-as-you-go basis with guaranteed on-time delivery.
1 investor
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.
2 investors
Alpaca provides brokerage infrastructure APIs that enable fintechs and financial institutions to build investing applications and platforms with access to stocks, options, crypto, and other asset types. The company serves global financial institutions and retail developers across 40+ countries through developer-friendly APIs.
10 investors
AmpUp develops electric vehicle charging infrastructure solutions for drivers, businesses, and communities. The company builds dependable and accessible charging systems to expand EV adoption and mobility.
6 investors
Ascen provides working capital and credit management solutions for staffing and payroll agencies, offering real-time credit vetting, embedded funding lines, and automated invoice-to-payment reconciliation integrated into payroll operations.
1 investor
Ashby is a recruiting software platform that serves as an applicant tracking system (ATS) and all-in-one hiring management tool for talent teams. The platform provides recruiting operations, candidate pipeline management, hiring workflows, analytics, integrations, and features for managing the end-to-end hiring process.
8 investors
Askdata provides a natural language interface that allows users to query their connected data sources by asking questions in everyday language and receiving analytical insights.
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.
8 investors
Oklo develops next-generation fast fission reactors designed to produce clean energy at scale, with its Aurora model capable of generating up to 75MWe of power using recycled nuclear waste as fuel.
7 investors
Aura Vision provides AI-powered in-store analytics software for retailers, using computer vision to count customers and estimate demographics from existing security camera footage. The solution helps retailers optimize store performance and customer experience across physical locations globally.
3 investors
AuroraQ develops integrated quantum computing hardware by combining specialized quantum components for processing, communication, and memory in a unified system, similar to how classical computers combine components.
1 investor
A phone service that automatically dials business and government phone lines on behalf of users to avoid wait times, reducing typical hold durations from around an hour to five minutes. Autodial serves individuals calling financial institutions, utilities, customer service centers, and public agencies.
1 investor
Avalanche provides software development tools that startups can integrate to build and operate referral programs within their products.
2 investors
Avo is a SaaS analytics governance platform that helps product managers, developers, and data scientists plan, track, and govern product analytics. The platform enables organizations to make data-driven decisions quickly while maintaining data quality and preventing customer churn.
6 investors
AXDRAFT is a document drafting platform that uses pattern analysis to automate legal document creation for corporations, typically completing documents in under 4 minutes and integrating data from external and internal sources to reduce manual entry and errors. The platform includes features for data validation, e-signatures, and access controls, and its users report reducing drafting time by up to 90% and approval cycles by up to 4 days.
2 investors
Helloaxel develops technology solutions for the air travel industry to enhance passenger experience and operational efficiency. The company builds engineering and software infrastructure for airlines and travel platforms.
1 investor
Balto provides software that simplifies contest management by automating administrative tasks and enabling organizers to oversee large numbers of participants.
2 investors





















