Best Firebase Alternatives & Competitors in 2025

An open source Firebase alternative

Open Source

Android development environment based on IntelliJ IDEA

Monitor all your cloud services with our status page aggregator. IT teams choose IsDown to monitor all their vendors and get alerts whenever an outage occurs. Integration with Datadog, PagerDuty, Slack, Microsoft Teams, and a lot more.

Try for free paid Free Trial $37.0 / Monthly (Pro)

Realtime application framework (Node.JS server)

Open Source

Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.

Open Source freemium $9.0 / Monthly (Plus usage-based costs. (Growth Plan). )

Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.

Auth0 is a program for people to get authentication and authorization services for their own business use.

Open Source

PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.

A small framework for server-rendered universal JavaScript apps

Open Source

Low code backend to build apps faster and scale easily.

Open Source freemium $25.0 / Monthly

Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.

Open Source

Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.

Open Source

JavaScript library for app development using cloud services

A utility-first CSS framework for rapidly building custom user interfaces.

Open Source