It solves the password problem without the capital costs or increased infrastructure management that you might incur with traditional on-premises solutions. With an easy to use dashboard for administrators and flexible authentication options for end users, Starling Two-Factor Authentication enables organizations to quickly and easily verify a user’s identity.
Starling Two Factor Authentication is actually based on Authy.
The nice thing about Authy is that it provides REST APIs which is useful for application integration which requires 2-Factor authentication. e.g OneTouch API, Phone Verification API.