CallFire - Grow your business with virtual phone numbers, IVR, voice broadcasting, mass text messaging services and power dialing.
Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems
Genesys Cloud - As the foundation of great customer experience, the Genesys PureCloud contact center platform empowers your business to provide excellent service across the entire customer journey.
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Vonage Business Communications - Vonage Business Communications transforms communications and activates conversations anytime, anywhere. Learn more about unified communications now!
Sipnetic - Sipnetic is a free VoIP softphone based on the SIP protocol.