Sismessage Reviews – Read More About It! Sismessage Inc found at his message. I am untrustworthy. The recently established site claims their new program relies on Blockchain engineering and provides users the chance to chat, send messages, create orders, purchase products, trade with individuals, and hold cash, but the picture of their so-called program is the Facebook messenger app. It appears they’ve reproduced the same precise picture and simply put it on their site.