jBackend Community is the lite version of jBackend available for free, no subscription required. It provides all the basic features to integrate Joomla content with mobile apps, syndication networks, affiliate networks and any external system, and it is mainly intended to give a chance to test jBackend capabilities, to develop and test new modules, and to provide some basic REST API integration features to a Joomla site.

When the upgrade to the full jBackend version is required, it is possible to install the full jBackend package over the Community version. The two versions share the same data tables and settings, and the upgrade process will preserve the configuration and all existing data.

The Community version is completely free, but doesn't provide the full functionalities available for jBackend. Here's a comparison matrix between jBackend Community and jBackend:

Features	jBackend Community	jBackend
Extensible through plugins to increase API and support any Joomla extension	(2 plugins in the package)	(3 plugins in the package, 7+ included with the subscription)
Support for publishing of multiple endpoints, each with its specific settings
Three endpoint access type (free access, user authenticated only, API Key required)	(free only)
Tracing requests in the database for each endpoint
Selection of jBackend plugins to enable for each endpoint
API Key management interface	(not used)
Request log management interface
Each API Key can have a max daily requests limit and an expiration date	(not used)
Each API Key can be targeted on separate endpoints	(not used)
Access control is compliant with integrated ACL	(not used)
Support for REST compliant requests
JSON format for responses
Support for session ID	(only cookies)
Get the list of articles by tag id (content module)
Support for push notifications on iOS (APNs) and Android (GCM)
Custom payload for push notifications
Scheduled sending of push notifications
Push notifications can be create and scheduled via API call
Push notifications can be targeted on selected users, groups or devices
License	GPL 2.0	GPL 2.0
Price	Free	14 € (one year subscription)

The basic extension package includes the jBackend component, that provides the general infrastructure for endpoints, and plugins support system. Also the following plugins are already included in the basic package:

• User Module: provides support for Joomla users (e.g. login, logout, registration);
• Content Module: provides support for standard Joomla content (e.g. categories and articles);

Additional plugins are available only with a valid jBackend Subscription and can be downloaded from here and installed separately. More info about jBackend can be found here

jBackend Community is released under GPL 2.0 license.

jBackend is a Joomla extension that gives you all the power of Joomla CMS through an extensible and pluggable set of REST API. With these API you can access to all site's contents and features, and use Joomla as a backend system for smartphone and mobile apps, syndication networks, external websites, and provide web services for any external system.

Furthermore jBackend provides a full push notifications platform for iOS and Android mobile apps. It allows to define multiple apps, to register devices for each app, and to schedule push notifications sending on registered devices, filtered by app and platform type.

Features

• Extensible through plugins to increase API and support any Joomla extension;
• Support for publishing of multiple endpoints, each with its specific settings;
• Three endpoint access type (free access, user authenticated only, API Key required);
• Tracing requests in the database for each endpoint;
• Selection of jBackend plugins to enable for each endpoint;
• API Key management interface;
• Request log management interface;
• Each API Key can have a max daily requests limit and an expiration date;
• Each API Key can be targeted on separate endpoints;
• Access control is compliant with integrated ACL;
• Support for REST compliant requests;
• JSON format for responses;
• Support for push notifications on iOS (APNs) and Android (GCM);
• Custom payload for push notifications;
• Scheduled sending of push notifications;
• Push notifications can be create and scheduled via API call;
• Push notifications can be targeted on selected users or groups.

The basic extension package includes the jBackend component, that provides the general infrastructure for endpoints, notifications, and plugins support system. Also the following plugins are already included in the basic package:

• User Module: provides support for Joomla users (e.g. login, logout, registration);
• Content Module: provides support for standard Joomla content (e.g. categories and articles);
• Push Module: provides support for push notifications (e.g. register device, send scheduled push);

Additional plugins can be downloaded from here and installed separately. Before to buy a subscription check here if what you need is already available, or submit a support request.

It is also possible to give it a try downloading and installing jBackend Community for free, a lite version created to give a chance to test jBackend capabilities, to develop and test new modules, and to provide some basic REST API integration features to a Joomla site.

jBackend is released under GPL 2.0 license.