remoteStorage is described as 'An open protocol for per-user storage on the Web' and is an app in the online services category. There are more than 25 alternatives to remoteStorage for a variety of platforms, including Online / Web-based, Windows, Linux, Self-Hosted solutions and Android. The best alternative is Firebase, which is free. Other great apps like remoteStorage are Supabase, Etebase, GUN and 5apps.
remoteStorage is mainly a Game Development Tool but alternatives to it may also be Spreadsheet Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of remoteStorage.
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.