Backend as a service (BaaS), sometimes also referred to as mobile backend as a service (MBaaS),[1][2][3] is a service for providing web app and mobile app developers with a way to easily build a backend to their frontend applications. Features available include user management, push notifications, and integration with social networking services.[4] These services are provided via the use of custom software development kits (SDKs) and application programming interfaces (APIs). BaaS is a relatively recent development in cloud computing,[5] with most BaaS startups dating from 2011 or later.[6][7][8] Some of the most popular service providers are AWS Amplify and Firebase.