Build voice, video and text applications easily with Asterisk, the world's most widely-adopted open source communications software.
Create Custom Communications Solutions.
Asterisk is an open source framework for developing state-of-the-art communications solutions. Developers use Asterisk to create innovative, custom products because it makes it easy to build almost any communications application you can imagine. It includes hundreds of pre-built components that handle the complex, low-level details of voice, video, and text communications. Asterisk powers many applications, including automatic call distributors, conference bridges, voicemail, unified messaging, and more. Discover how Asterisk can power your next-generation communications deployment.