Developers will be able to build voice features into apps using the Google platform.
Twilio currently offers its API for iOS and the web, and claims to have 90,000 registered developer accounts.
Now, its Android APIs will let let developers incorporate VoIP features directly into apps without the need to launch any discrete services.
Other features in the SDK include real-time presence and app backgrounding so that users can receive voice calls even if the app is not being used.
Twilio is hoping that embracing Android will kickstart all manner of new cross-platform voice services via apps.
Thomas Schiavone, director of product management for Twilio, said: “With this many developers and our proven success on iOS, we know we’ll see some incredible and innovative cross-platform communication apps in the months to come.”
The move is part a recent expansion by Twilio that saw the firm poach Telefonica/BlueVia exec James Parton to run its Euro operation.