Based on our record, Kuzzle seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
Also I recommend you to use foreign-key database structure, instead of documents. To my opinion it suits better to Parse Server. If you wanna use documents, you could try kuzzle also good solution! - Source: Reddit / 6 months ago
Back4App - For devs, by devs. An easy way to build, host and manage Apps using the open source Parse Server. Scalable Servers, Pre-build examples, Cross-Platform support
MongoDB - MongoDB (from "humongous") is a scalable, high-performance, open source NoSQL database.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
CouchDB - HTTP + JSON document database with Map Reduce views and peer-based replication