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https://www.malabi.co/api-documentation/
http://www.phpfreechat.net
https://www.cometchat.com
https://www.arrowchat.com

FYI - I can't for sure tell but you guys already built/integrate a Live...

v5 Seller Live Chat and image background burner or Remover Modules

Are you guys going to have either one or both of them on v5?

-Add/Integrate Malabi or some sort of image background remover...