Is Firebase relational database or non relational?

Real time syncing for JSON data The Firebase Realtime Database is a cloud-hosted NoSQL database that lets you store and sync data between your users in realtime . NEW: Cloud Firestore enables you to store, sync and query app data at global scale.

Firebase applied like NoSQL DB The Firebase Realtime Database is a NoSQL Database which has a lot of optimizations and features compared with most of relational databases. … Firebase is a Database stored as JSON objects, which is easier to use than some SQL databases for the way to handle the data like a tree.16 Kas 2016

Firebase is a real-time object store. It is not a SQL database and is not intended to be a replacement for one. It completely lacks mechanisms such as JOINs, WHERE query filters, foreign keys, and other tools relational databases all provide.