EJDB is described as '2.0 — Embeddable JSON Database engine C library. Simple XPath like query language (JQL). Websockets / Android / iOS / React Native / Flutter / Java / Dart / Node.js bindings' and is an app in the Development category. There are six alternatives to EJDB for Mac, Linux, Windows, BSD and Online / Web-based. The best alternative is MongoDB, which is free. Other great apps like EJDB are RethinkDB (Free, Open Source), CockroachDB (Free), Titan Database (Free, Open Source) and Cosmos DB (Paid).
MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need MongoDB stores data in flexible, JSON-like documents, meaning fields can vary from document to document and data structure can be changed over...
RethinkDB pushes JSON to your apps in realtime. When your app polls for data, it becomes slow, unscalable, and cumbersome to maintain. RethinkDB is the open-source, scalable database that makes building realtime apps dramatically easier.
Cockroach is a distributed key/value datastore which supports ACID transactional semantics and versioned values as first-class features. The primary design goal is global consistency and survivability, hence the name.