NectarChat application has been developed with XMPP protocol. Currently we are offering this application in iOS(iPhone), Android platform and Back end application implemented with Openfire XMPP server. Also we have custom back end panel which is developed in PHP to manage own modules in our application like stickers, payments and social module. So we have two back end application panel which is separate panel for chat application alone & Separate panel for custom module managements. Our application has been developed with native codes.

iPhone application - Objective C
Android phone application - Java

What is Openfire?
Openfire is a real time collaboration (RTC) server licensed under the Open Source Apache License. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Openfire is incredibly easy to setup and administer, but offers rock-solid security and performance.

Then we have used MySQL as our Database.