Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
Oracle Mobile Hub - Oracle Cloud allows you to provide secure mobile access to all your data and applications.
AWS Amplify - JavaScript library for app development using cloud services
MongoDB Stitch - The serverless platform from MongoDB
AWS Mobile Services - Storage, Analytics, Push Notif. & SMS Delivery SDKs
Kinvey - Kinvey is a BaaS provider that makes it easy for developers to set up, use and operate a cloud back-end for their mobile apps.