Today, co-founders David Sacks and Axel Ericsson announced the launch of Callin, available today on the Apple App Store. Callin is the first "Social Podcasting" platform where users can create, discover, and consume live and recorded audio content in one place. It combines the best aspects of social audio - live conversations and social discoverability - with the best of podcasting - a library of quality, episodic content that users can listen to anytime.

Callin also announced today that it has raised $12 million in a Series A financing round co-led by Sequoia Capital, Goldcrest Capital, and Craft Ventures. The company was also incubated at Craft, where Sacks is a founder and general partner.