FB messenger isn't a replica precisely because it ties into FB. WhatsApp made it a point to be extremely easy to sign up for and to not require any other major

FB messenger isn't a replica precisely because it ties into FB. WhatsApp made it a point to be extremely easy to sign up for and to not require any other major social media accounts. Somewhat ironically, Facebook may have been more successful in replicating WhatsApp if they had also made a messenger that was not connected at all with Facebook other than its corporate origins.