Y Combinator Winter 2009 (W09) Companies

Airbnb operates an online marketplace where people list, discover, and book accommodations ranging from apartments to villas, for travelers worldwide. It connects hosts with guests across more than 33,000 cities and 192 countries via web and mobile.

70 investors

Cloudkick provides monitoring, alerting, and visualization tools for managing cloud servers across providers such as Rackspace Cloud and Amazon EC2. It offers detailed health graphs and server categorization to support production infrastructure running in the cloud.

1 investor

Divvyshot is a photo-sharing platform that lets users share full-resolution photos with friends. The company was based in San Francisco and was acquired.

1 investor

Echodio offered a service to sync and stream personal music libraries across devices and media centers, including backup of music collections. The company was acquired in 2009.

1 investor

Foodoro operates an online marketplace connecting consumers with artisanal food producers, letting people discover and buy specialty food products directly from the makers. It serves food enthusiasts looking for products from small independent "Foodmakers."

1 investor

Heyzap operates a mobile ad network and SDK for Android and iOS that lets app producers and indie developers monetize and promote their apps. It provides advertising, publishing, mediation, and cross-promotion services to mobile developers worldwide.

3 investors

Nambii operated an online dating service with iPhone apps that let users send and receive flirts with nearby people. The company is now inactive.

1 investor

Picurio offers web-based software for sharing and managing photos online.

1 investor

thesixtyone is a community-driven music discovery site where listeners vote on independent songs using a daily allotment of "hearts," earn reputation points and achievement badges, and stream tracks organized into tag-based playlists. It serves music listeners and independent artists seeking exposure for new music online.

1 investor

reMail was a YC-backed (W09) email company that was acquired by Google in 2010. The page reads as a personal bio of the founder rather than an active company site.

1 investor

Skysheet was a web-based, browser-based spreadsheet application. As of March 2009 it was in stealth mode.

1 investor

1 investor

Volantio provides travel technology software for post-booking revenue and capacity optimization used by major airlines worldwide. Its Yana platform helps airlines generate incremental revenue and cut operational costs while giving passengers more control.

4 investors

Voxli provides browser-based group voice chat that lets up to 200 people talk together without installing software or running a voice server, aimed at gamers and teams. Each voice chat lives at a persistent shareable URL, works on Windows and Mac, and supports push-to-talk outside the browser.

1 investor

Wattvision provides sensors and software for tracking home energy consumption in real time via the web. The company originally sold a combined hardware-and-software solution and now develops software that works with its hardware partners.

1 investor