WhatsApp, FaceTime, Signal, Facebook Messenger, Skype, Viber, Trillian, RebTel, Zulip, Gruveo, Empathy, Google Voice and Video Chat, Paltalk, textPlus, Talky, MXit, Onoff, Tinychat, Toky, Ventrilo, FluffyChat, iChat, Voipbuster, Voxeet, Voip Stunt, GV Connect, Dingaling, goober Messenger, Ayttm, Speak Messenger, Indoona, Superpeer, TokBox, EonPhone, Tkabber, forfone, WTW, Voxalot, Vidii, Logitech Vid HD, Bravis, Qnext, Highfive, JAJAH are some alternatives to Tango.