Y Combinator Winter 2015 (W15) Companies

20n uses machine learning and computational biology to predict DNA sequences for industrial biotech and pharmaceutical applications. The company serves manufacturing firms developing biologically-based alternatives to traditional chemical production of fuels, materials, therapeutics, and specialty chemicals.

1 investor

3dot develops products, services, and concepts using emerging technologies for corporate clients. The firm conducts research and ideation work to help partner companies bring new offerings to market.

1 investor

Akido Labs develops an AI operating system designed for healthcare that leverages machine learning to enable personalized medical diagnostics and care coordination at scale. The platform aims to make high-quality healthcare accessible regardless of financial means or geography.

8 investors

Automate Ads builds software for managing and optimizing digital advertising campaigns across multiple channels.

1 investor

Bagaveev Corporation develops small launch vehicles powered by 3D-printed aerospike rocket engines, building a roughly 3-ton rocket to carry 10-12 kg nanosatellites into low Earth orbit and Sun-synchronous orbit. It serves customers in the aerospace and satellite launch industry.

1 investor

Bankjoy is a digital banking platform that enables community banks and credit unions to deliver digital experiences comparable to large banks. The platform includes mobile apps, account management tools, fraud prevention, and vertical banking solutions for reaching niche markets.

5 investors

Bizzy provides a platform that consolidates marketing campaigns across multiple channels for online retailers, using unified customer data to automatically adjust messaging and execution in response to customer activity.

1 investor

Bluesmart manufactures connected luggage with integrated app controls for travelers seeking location tracking and mobile device management features. The company serves global customers through carry-on suitcase designs distributed across multiple continents.

2 investors

Euna Procurement is an AI-powered procurement software platform designed for government agencies to manage sourcing, contracts, purchasing, and invoicing across the full procurement lifecycle. It serves public sector organizations seeking to improve operational efficiency, ensure regulatory compliance, and reduce procurement costs.

2 investors

Booktrope operated a publishing platform where authors, editors, designers, and marketing professionals formed teams to publish books across multiple formats without upfront author fees. The platform aimed to reduce production timelines and direct a larger share of book sales revenue to creators than traditional publishing models.

1 investor

Bright provides solar energy systems and battery storage (BESS) solutions for industrial, manufacturing, and commercial businesses in Mexico, along with flexible financing options including PPAs, leasing, and direct purchase to facilitate renewable energy adoption.

1 investor

BuildScience provides software that building owners use to manage operations and tenant services in commercial properties. The platform has been deployed in large office buildings to reduce costs and improve tenant satisfaction.

1 investor

Chariot operates a shared commuting service that uses optimized routing to transport multiple passengers between home and work destinations. The service targets cost-conscious commuters across various neighborhoods and income levels.

1 investor

ByNext provides on-demand laundry, dry cleaning, home cleaning, and related services with pickup and delivery in major U.S. cities. The company serves consumers and businesses seeking convenience through its app-based platform.

3 investors

A rental marketplace that connects college students with off-campus housing options and allows property managers to list available units.

1 investor

CyberFend provides fraud detection and security for web and mobile applications, identifying account takeovers, payment fraud, and compromised credentials through machine learning analysis. The service protects consumer-facing platforms including e-commerce and payment systems.

1 investor

Dabble produces computer-generated product images for e-commerce retailers, replacing traditional photography with automated CGI and computer vision technology.

1 investor

Dealyze provides in-store digital loyalty and referral management software for small retailers, combining customer rewards programs with marketing automation to increase repeat purchase behavior.

1 investor

Democracy Earth develops open-source voting and governance software designed to operate without censorship across internet-connected communities, from cryptocurrency networks to activist groups and government bodies. The platform enables participatory decision-making mechanisms including quadratic voting, applicable to both digital and traditional democratic institutions.

1 investor

A web-based tool for downloading TikTok videos, audio, photo slideshows, and stories in HD quality without watermarks directly to a user's device through a browser.

1 investor

Direct Match operates a trading platform for US Treasury securities that connects buyers and sellers directly.

1 investor

eBrandValue provides real-time social-engagement analytics software that analyzes brand conversations, market share fluctuations, and consumer switching behavior to deliver marketing insights and predict sales trends. The platform serves marketing executives and consumer brand companies seeking early market intelligence and campaign performance measurement.

1 investor

EquipmentShare provides construction equipment rentals and fleet management technology for builders and contractors. The company operates T3, a cloud-connected operating system that gives jobsites real-time visibility into fleet assets and equipment with telematics, maintenance support, and safety tools.

16 investors

Final was a financial services company that issued a Visa card product. The company was acquired and is no longer operating.

3 investors