How Much does it Cost to Create a Instant Messaging Chat App like Whatsapp?

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Dec 2, 2016 1:15:13 PM via Website

To Create a chat app like Whatsapp or Facebook Messenger, Viber, LINE technology is the cornerstone you have to invest in. Whatsapp rose to the status being the world's most used app owing to its tech prowess. Here is a brief sprint through the technologies that powers a chat app like Whatsapp, Viber, LINE.
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First about technologies:

Ejabbered - A customized Ejabberd server does the duty of achieving operational efficiency and the XMPP protocol used speeds up signing in and re-signing in sessions.
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Mnesia & MySQL - Mnesia contributes in maintaining user login sessions and improving response time while MySQL DB holds the repository of user details.
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Cassandra database - For superfast chat log sending & receiving, Chat app Solution makes use of Cassandra database.
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Amazon S3 Bucket -For heavy lifting and storage when it comes to multimedia file saving is done via Amazon S3 Bucket.
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ERLANG - ERLANG language enhancements the Ejabberd sever used for considerate a huge communication system.
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Secondly about Features, Whatsapp has a lot of features like file transfer, Group Chat, Offline Messages, Push notifications, Presence Indication, Social Integrations, Geo location Tracking, Sync and Store, Voice Calling, Video Calling, Easy Screen Sharing, Fully Searchable, Security & Privacy

The cost involved in building a chat app like WhatsApp will vary depending on the kind of features desired to be included. Want to know how much it will cost to build an app that looks exactly like Whatsapp?

— modified on Dec 14, 2016 2:01:59 PM