Y Combinator Summer 2005 (S05) Companies

ClickFacts provides malware detection and content moderation software for buyers and sellers of online media, testing ads and web pages to prevent malware distribution and inappropriate content. It serves advertisers and websites in the advertising technology and cybersecurity space.

1 investor

Infogami provides business intelligence solutions that convert raw data into usable information to help organizations gain insights, improve decision-making, and support collaboration. It emphasizes subject matter expertise and tools for sharing information across an organization.

1 investor

Kiko is a web-based calendar application that lets users keep and share their calendar online, with access from any computer and integration with mobile phones and AIM. It supports inviting others to events, sharing calendar views, and recurring entries.

1 investor

Loopt operates a social-mapping mobile service that uses a person's location to help them discover nearby people, places, and events. It targets consumer smartphone users.

3 investors

Memamp offered a desktop search tool. The company was part of Y Combinator's Summer 2005 batch and is now inactive.

1 investor

Reddit operates an online community platform where users submit, vote on, and comment on content, news, and discussions across desktop, mobile web, and its Android and iOS apps. It serves a general consumer audience, reaching hundreds of millions of monthly users, primarily in the United States.

37 investors

1 investor

TextPayMe is an SMS-based peer-to-peer payment service that lets people in the US send and receive money via text message, funded through a linked bank account or credit card. Founded in 2005, the team joined Amazon in 2006 and the service was assumed to be acquired.

1 investor