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Home/Categories/Backend Development/Kuzzle
icon of Kuzzle

Kuzzle

Open source alternative to Google Firebase, AWS Amplify and Microsoft Azure Cosmos DB

Kuzzle is an open source backend platform with a real-time API, database abstraction, authentication, and permissions built in. A self-hosted alternative to Firebase; Apache-2.0 licensed.

1.6K starsJavaScriptApache-2.0Active this month
Visit websiteGitHub repo
image of Kuzzle
Contents
  1. 01Who Kuzzle is for
  2. 02The problem it solves
  3. 03How it solves it
  4. 04Strengths and trade-offs
  5. 05Tech stack
  6. 06FAQ
  7. 07Similar open-source tools
TL;DR

Kuzzle is a self-hosted backend tool with APIs, real-time notifications, persistent data, user management, and search for web, mobile, and IoT apps. It replaces Firebase-style hosted backends for teams that need infrastructure control and advanced query behavior. Apache-2.0 licensed.Apache-2.0 · JavaScript · 1.6K stars · Active this month

who it's for

Who Kuzzle is for#

Teams building real-time apps

Use Kuzzle when a web, mobile, or IoT app needs real-time updates, API access, persistence, and permissions in one backend.

Skip if:

You want a fully managed zero-ops backend and accept vendor lock-in.

IoT teams managing live device data

Use Kuzzle for connected-device applications that need APIs, pub/sub, and searchable persistent data.

Skip if:

Your IoT stack already has a specialized managed device platform that covers all required protocols.

the problem

The problem it solves#

Backend-as-a-service tools help teams ship quickly, but they can lock application data, auth, real-time features, and pricing into one vendor. That hurts when a product needs custom infrastructure, data residency, or query behavior the hosted backend does not support.

Building the same backend primitives for every app is also wasteful. Teams need APIs, storage, auth, and real-time updates before they can focus on product-specific logic.

how Kuzzle solves it

How it solves it#

API-first backend

Provides standardized APIs for application data so teams can build web, mobile, and IoT clients without writing every backend primitive from scratch.

Real-time notifications

Supports pub/sub and database notifications, making it useful for live dashboards, collaborative apps, and IoT updates.

Persistent data and user management

Includes data storage, advanced search, login, logout, and security rules as built-in backend capabilities.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Common backend building blocks includedKuzzle bundles the pieces many apps repeatedly need: API access, persistence, real-time behavior, users, permissions, and SDK support.
  • Better fit for controlled deploymentsSelf-hosting gives teams a path for data residency, custom plugins, and infrastructure control that hosted BaaS products may not provide.

Trade-offs

  • -Requires backend operationsKuzzle reduces application backend work, but teams still operate the service, database/search dependencies, upgrades, and security policy.
tech stack · detected from GitHub

What it's built on#

Languages
JavaScriptTypeScript
Search
Elasticsearch
Cache
Redis
frequently asked

FAQ#

What is Kuzzle used for?

Kuzzle is used to build self-hosted backends with APIs, real-time notifications, persistent data, user management, and search.

Is Kuzzle a Firebase alternative?

Yes. Kuzzle can replace Firebase-style backend services for teams that need self-hosting, infrastructure control, and more backend customization.

What apps fit Kuzzle best?

Kuzzle fits web, mobile, and IoT applications that need real-time data, auth, search, and API access without assembling each backend piece separately.

also worth a look

Similar open-source tools#

Modelence

Modelence

Full-stack framework for building production-ready web apps

401TypeScript
Supabase

Supabase

Open source Firebase: Postgres database, auth, and file storage

102.3KTypeScriptApache-2.0
Appwrite

Appwrite

Self-hosted backend: auth, databases, storage, and functions

56.1KTypeScriptBSD-3-Clause
Nhost

Nhost

Firebase alternative: GraphQL, Postgres auth, and file storage

9.2KTypeScriptMIT
Encore

Encore

Auto-generate infrastructure from your TypeScript or Go code

12KGoMPL-2.0
Manifest

Manifest

One YAML file gives your app auth, CRUD, storage, and admin UI

6.7KTypeScriptMIT

Repository

Stars
1.6K
Forks
134
License
Apache-2.0
Latest
v2.55.0
Last commit
11 days ago
Last verified
May 29, 2026
Repo
kuzzleio/kuzzle ↗

Additional details

Language
JavaScript
Open issues
0
Contributors
83
First release
2015

Categories

Backend DevelopmentAPIs & IntegrationDatabases & Storage

Tags

BaaSAPI Development ToolsDatabaseAuthenticationAuthorizationWebSocket ServersSelf HostedAPI Infrastructure