Y Combinator Winter 2012 (W12) Companies

42Floors operated an online marketplace where users could browse and compare available commercial office spaces across major U.S. markets, with property photos and detailed information to support leasing decisions.

2 investors

99 Dresses is an online marketplace for buying and selling secondhand women's clothing and fashion items. The platform connects individual sellers and buyers in a peer-to-peer ecommerce model focused on circular fashion.

1 investor

Amiato offers a data integration platform that syncs unstructured data from NoSQL databases like MongoDB and CouchDB into business intelligence and analytics tools. The service enables companies to run reports and perform ad-hoc analysis on data stored in flexible databases without manual schema setup or data transformation work.

1 investor

Amplitude provides an AI analytics platform that helps companies understand customer behavior and make data-driven product decisions. The platform serves product and engineering teams across enterprises looking to optimize user experience and digital innovation.

13 investors

Ark is a search engine that indexes social network profiles to help users find people, including classmates, professional contacts, and acquaintances.

2 investors

Authy provides a two-factor authentication (2FA) app that protects user accounts from unauthorized access by requiring device-based identity verification. The service enables individuals to secure their online accounts across various platforms against hackers and account takeovers.

7 investors

Kytephone is a parental control mobile app that lets parents manage a child's phone through a Parent Dashboard, including selecting age-appropriate apps, setting screen time limits, blocking calls and SMS, and GPS location tracking. It offers a locked "Kid Mode" interface and a "Parent Mode" for configuration.

1 investor

BookSolid provides reservation and booking management software for tour operators and activity providers.

1 investor

Brace is a web hosting service that syncs with file storage like Dropbox and maintains separate draft and production environments, with the production version optimized for performance.

2 investors

Carsabi operates a search platform that helps buyers discover used vehicles across multiple sources.

1 investor

Chute provides a platform that helps brands, agencies, and publishers find, create, and distribute user-generated photos and videos, using visual and text search tools. The company serves enterprise clients across retail, media, and sports industries.

1 investor

CircuitHub operates an automated electronics manufacturing facility with integrated software to help hardware companies prototype circuit boards and bring products to market faster. The platform serves companies building autonomous vehicles, satellites, robotics, and 3D printers.

1 investor

CleverDeck is a spaced repetition learning app that uses the SM-2 algorithm to customize review intervals for individual pieces of information. The app helps users study more efficiently by tracking retention and adjusting study schedules based on mastery.

1 investor

A collaborative platform where software developers learn and develop their programming skills.

1 investor

Couple.me is an AI-powered chat application that lets users create and interact with customizable virtual AI characters, including AI girlfriends and boyfriends, for entertainment and companionship. The platform uses machine learning to generate human-like conversations and personalized images based on user preferences.

1 investor

Documents.Me provides encryption software that protects files stored locally and in cloud services. The company serves enterprise clients seeking secure file sharing capabilities.

1 investor

FamilyLeaf provides a private social network for families to share photos, updates, messages, and contact information with each other across distances.

1 investor

Bushel is a farm management software platform that provides farmers with operational and financial insights, including grain contract tracking, profit analysis, and automated data integration. The company also offers Bushel Business Accounts with banking services for agricultural operations.

2 investors

Flutter is a location-based dating app that lets users record short videos to attract nearby potential matches. To confirm compatibility, two users who like each other must be online simultaneously and maintain eye contact via webcam for 15 seconds.

1 investor

Reward Gateway | Edenred provides a unified employee engagement platform that helps organizations design and deliver employee value propositions through recognition, wellbeing, benefits, and discounts. The platform serves mid-to-large organizations across 65+ countries seeking to improve employee retention and business performance through integrated HR technology.

4 investors

A platform that facilitated fundraising campaigns organized by celebrities for charitable causes.

1 investor

Glider helps businesses manage their contract workflows and reduce administrative overhead so teams can focus on core operations rather than manual contract handling. The platform serves organizations of all sizes across various industries.

1 investor

Grouper organizes group social outings where two friend groups meet for drinks, typically consisting of three people per group. The service operates across major US cities and connects strangers through structured friend-group gatherings.

1 investor

Gusto provides payroll processing, employee benefits administration, and HR management tools to businesses, offering integrated software alongside support services for these functions.

47 investors