CallJoy, CallRail, CloudTalk.io, 8x8 Virtual Office, Sideline, KrispCall, TeleCMI, Ringblaze, MightyCall, RingRoost, Dialpad, Aircall, Vumber, Telzio, LimeCall, Phonebooth, Zaplee, Callcap, Mitel, Aloware, NUACOM, Tackle, Slingshot VoIP, Truly Wireless, Ringio are some alternatives to JustCall.