Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Notix.co - NOTIX is an audience re-engagement service based on web and in-app push notifications that work for both desktop and mobile devices.
Supabase - An open source Firebase alternative
neo4j - Meet Neo4j: The graph database platform powering today's mission-critical enterprise applications, including artificial intelligence, fraud detection and recommendations.
Appcelerator - Native apps, Mobile APIs, Real-time analytics, One Platform.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.