AbtoVoIPClient vs iCallify

ABTO Software's VoIP SIP softphone. Can be used to call sip numbers and landline numbers (if sip provider has this option). Features: voice calls; video calls; text chat (based on SIP MESSAGE request); works with all popual SIP servers, including Asterisk/FreeSwitch; make direct calls between clients without SIP server; allows to use UDP/TCP/TLS protocols for SIP transport; ability to make secure calls using SRTP/ZRTP; supports STUN/ICE; IPv6 support; CallKit - native incoming call UI and system integration of VoIP calls; 2 simultaneous calls; call conferencing; attended transfer.

Boost your business communication with the iCallify Business Phone System app – a powerful, AI-driven VoIP solution designed for seamless connectivity, smart calling, and efficient collaboration. Whether you're managing a sales team, support center, or remote workforce, iCallify brings all the tools you need into one easy-to-use mobile platform. Key Features: Smart Call Routing & Queuing Cloud-based VoIP System – work from anywhere Team Collaboration Tools & Call Conferencing Call Transfer, and History Management Intuitive UI Developed with cutting-edge technology, iCallify is more than just a dialer – it’s your business communication hub. Stay connected, stay productive, and take your customer engagement to the next level. Built for businesses of all sizes – from startups to large enterprises.