3CX is a software-based PBX solution with a cloud hosted option, offering users web conferencing, CRM integration, instant messaging, and native mobile apps.
Interactive Intelligence is a global leader of cloud services for customer engagement, communications and collaboration designed to help businesses worldwide improve service, increase productivity and reduce costs.
Wire is a secure messaging & collaboration tool for businesses with end-to-end encryption, group chats, video & voice calls, file sharing and screen sharing.