Sismessage Inc Reviews – Read More Info! Sismessage Inc found in his message. I’m untrustworthy. The newly established website claims their new app relies on Blockchain technology and supplies users the opportunity to chat, send messages, create orders, buy goods, trade with people, and hold money, but the image of their so-called app would be the Facebook messenger app. It seems they have replicated the same picture and just place it on their website.