Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
AWS Mobile Services - Storage, Analytics, Push Notif. & SMS Delivery SDKs
MongoDB Stitch - The serverless platform from MongoDB
Oracle Mobile Hub - Oracle Cloud allows you to provide secure mobile access to all your data and applications.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.