Materia is described as 'easy-to-use backend to build all kinds of applications (mobile, web, gaming and more) Materia tooling manages the entire development cycle for building enterprise class backends (database relationships, database synchronization, API management, static file hosting' and is an app in the Development category. There are six alternatives to Materia for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Apple Watch, Apple TV and Android Wear. The best alternative is Firebase, which is free. Other great apps like Materia are Meteor (Free, Open Source), Etebase (Free, Open Source), Supabase (Free, Open Source) and Backendless (Freemium).
Etebase makes it easy to build end-to-end encrypted applications by taking care of the encryption and its related challenges. Think Firebase but encrypted in a way that only your users can access their data.