Parse is described as 'The complete backend for your mobile app. It makes it simple to add rich features to your iOS, Android, and HTML5 apps' and is a backend as a service in the development category. There are more than 25 alternatives to Parse for a variety of platforms, including Web-based, Android, iPhone, Mac and Windows apps. The best Parse alternative is Firebase, which is free. Other great apps like Parse are Parse Server, remoteStorage, 5apps and AWS Amplify.
Firebase, provided by Google, is a backend service and application development platform. It uses AI, cloud infrastructure, and cross-platform SDKs for efficient app development. Firebase offers tools and infrastructure for app creation and business growth.
AWS Amplify is a complete solution that lets frontend web and mobile developers easily build, ship, and host full-stack applications on AWS, with the flexibility to leverage the breadth of AWS services as use cases evolve. No cloud expertise needed.
deepstream.io is a clusterable realtime server that handles persistent tcp and websocket connections. It offers data-sync, pub/sub and request/response. It's available for Linux, Mac and Windows and comes with clients in JS, Java and many others.
Low code backend to build modern apps. Back4app accelerate backend development, improves development productivity, reduces time to market, and let you scale applications without managing infrastructure.
Nakama is an open-source distributed social and realtime server for games and apps. It has a large set of services for users, storage, and realtime communication; as well as specialized APIs like realtime multiplayer, groups/guilds, and chat.
restdb.io is a Plug-and-Play Database Service, suited perfectly to power business apps and dynamic web content.
CloudBoost can power your app's backend, including data storage, user authentication, real-time notifications, search and more.
Hasura makes data access easy, by instantly composing a GraphQL API that is backed by databases and services so that the developer team (or API consumers) get immediately productive. The nature of GraphQL itself and Hasura’s dynamic approach makes integration and iteration easy.
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Firebase its not a good option for Parse migration. Using Firebase you should learn how to use a new technology, rewrite all your backend App, rewrite all the API communication (front-end) and manually migrate all your database data. Additionally I think the Firebase still have the same problem that Parse.com had, the vendor Lock-in. Parse Server now its open source and have, so you can enjoy a powerfull framework without locks! I recommend you use a Parse Server hosting solution.