Y Combinator Summer 2009 (S09) Companies

1 investor

Bump developed a mobile app that allowed users to share contact information and photos by physically tapping their phones together; the company was acquired by Google in 2013, where its unreleased photo application technology became the foundation for Google Photos.

1 investor

CarWoo connects car buyers with multiple dealerships to compare offers and purchase new vehicles. The platform helps customers find deals from dealers across their network.

1 investor

A photo and status-sharing platform that allows users to stay connected with friends through real-time updates.

1 investor

Directed Edge provides a Shopify app that generates product recommendations for e-commerce stores, including related products, personalized suggestions, and shopping cart recommendations. The tool delivers half a million recommendations daily and supports advanced features like hand-picking, business rules, and integration with transactional emails.

1 investor

FanChatter collects and distributes user-generated content about brands and entertainment properties, serving media companies and content creators who want to repurpose fan discussions as marketing material.

1 investor

GraffitiGeo is a location-based service where users can post brief reviews and ratings of restaurants, view aggregated feedback from other diners, and earn points through participation that unlock team-based territorial gameplay features.

1 investor

HighlightCam is a mobile app that continuously records the last 15 seconds of video and allows users to save clips when a highlight occurs, enabling sports teams and schools to capture and share action moments. The app serves sports clubs and schools in New Zealand.

1 investor

InstantQ is a platform that helps restaurants send time-sensitive promotional offers to their customer base.

1 investor

JobSpice provides an online resume builder that lets job seekers create and manage multiple resume versions in different formats, including web and PDF outputs.

1 investor

Lingt is a language learning platform that provides educators with drag-and-drop tools to create speaking assignments and assessments using voice, video, and images. The platform serves language teachers and instructors seeking alternatives to traditional language labs and practice interviews.

1 investor

Listia is a marketplace where users buy and sell used items across multiple categories using a points-based currency system without transaction fees. The platform serves consumers looking to declutter or acquire secondhand goods through peer-to-peer trading.

1 investor

A hardware device that attaches to existing deadbolt locks and enables remote control of locking and unlocking through a mobile application.

1 investor

Mixpanel provides analytics software for marketing teams to track user behavior, measure campaign performance, and prove return on investment across channels.

4 investors

Olark provides live chat software that enables businesses to communicate with customers in real time. The platform serves small to mid-market businesses seeking customer engagement and support tools.

1 investor

Plurchase adds a social layer to online shopping by displaying a toolbar that lets users chat with friends and see what items those friends are browsing across retail sites like Zappos.

1 investor

RentHop is an apartment rental marketplace that connects renters with listings ranked by freshness, accuracy, and property manager responsiveness, while providing brokers and property managers a platform to post listings and reach qualified tenants.

1 investor

RethinkDB is a distributed document database that enables developers to query JSON documents across multiple programming languages and integrates with modern web frameworks for real-time applications.

1 investor

1 investor

1 investor

Stripe provides financial infrastructure for businesses to accept payments, offer financial services, and implement custom revenue models across international markets in 135+ currencies.

47 investors

WakeMate makes a wristband that monitors sleep through motion tracking and syncs with a user's phone to trigger alarms during light sleep phases, along with a platform that provides sleep analysis and insights into sleep patterns.

1 investor

WePay provides payment processing infrastructure via API for software platforms, point-of-sale systems, and online marketplaces serving small and medium-sized businesses.

5 investors