When comparing Loopback vs Back4App, the Slant community recommends Back4App for most people. In the question“What are the best self-hosted BaaS (backend-as-a-service) providers?” Back4App is ranked 1st while Loopback is ranked 5th. The most important reason people chose Back4App is:
The platform is reliable allow to scale up the applications running on it.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Easy to get a project up and running
Easily and quickly get going.
Pro Open source
Back4app is an open source BAAS and Backend generator.
Pro Smooth migration from Parse
Back4App offers a smooth migration for all former Parse users who wish to migrate their data now that Parse has announced that it will stop soon.
Cons
Con Strong-PM process manager
It's not required to run a loopback app and can be a pain to deal with.
Con Uses MongoDB for the backend, which is not considered very safe by many
Back4App uses MongoDB as the database where data is stored. Mongo has been known to have issues with data corruption and data loss.