Best SignalDB Alternatives & Competitors in 2025

A fast, offline-first, reactive Database for JavaScript Applications.

Key RxDB features:

Offline-First Architecture Reactive Data Stores Cross-Platform Compatibility Flexible Schema Management

Open Source freemium €400.0 / Annually

Open-source JavaScript database inspired by Apache CouchDB that's designed to run well within the browser.

Key PouchDB features:

Offline-first Architecture Cross-Platform Compatibility CouchDB Compatibility Easy to Use

Open Source

Clear, Fast & Unlimited. Residential & Mobile Proxies For Best Price.

Key ASocks features:

HTTP Socks5 ASN targeting Pay as you go

Try for free paid Free Trial $3.0 (3$ per 1 Gb)

Realm is a mobile platform and a replacement for SQLite & Core Data. Build offline-first, reactive mobile experiences using simple data sync. .

Key Realm.io features:

Easy Integration Performance Cross-Platform Support Real-Time Data Sync

Open Source

Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.

Key Firebase features:

Real-time Database Easy Integration Scalability Authentication Services

Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.

Key Meteor features:

Full-Stack Solution Reactive Programming MongoDB Integration Rich Ecosystem

Open Source

Realtime database backend based on Operational Transformation (OT).

MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

Key MongoDB features:

Scalability Flexible Schema High Performance Rich Query Language

Open Source

PostgreSQL is a powerful, open source object-relational database system.

Key PostgreSQL features:

Open Source ACID Compliance Extensible Advanced SQL Features

Open Source

Self-hosted Firebase.

Key GUN features:

Decentralized Real-time synchronization Offline-first Scalability

Open Source

A CRDT framework with a powerful abstraction of shared data, Shared data types for building collaborative software.

Key Yjs features:

Real-time Collaboration Conflict-free Replicated Data Type (CRDT) Scalability Offline Editing

Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Key Redis features:

Performance Data Structures Scalability Persistence

Open Source

IndexedDB is a low-level API for client-side storage of significant amounts of structured data, including files/blobs.

Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.

Key Zapier features:

Ease of Use Wide Range of Integrations Custom Automation Scalability