SignalDB is described as 'Client-side database with a MongoDB-like interface and TypeScript support. It allows easy data management, reactivity and persistence on the client side, with plans for future replication capabilities' and is an app in the backup & sync category. There are more than 10 alternatives to SignalDB for a variety of platforms, including Web-based, Self-Hosted, Mac, Windows and Linux apps. The best SignalDB alternative is Supabase, which is both free and Open Source. Other great apps like SignalDB are Firebase, Meteor, GUN and RxDB.