Back-end/API tools

Data/back-end as a service aka BAAS:

• [free to $]
• Firebase [free to $]
• [free to $]
• restdb.io [free to $]

Data/back-end

• Horizon
• • http://www.apollodata.com/
• RxDB

User Management as a Service:

• Auth0 [$]
• Stormpath