Callision offers communications solutions that allow users to utilize their own carriers and VoIP providers. Monthly fees range from $0–$29.99/user.
iPlum is a VoIP provider that offers mobile lines with toll-free, U.S., and Canada phone numbers. Its monthly fees range from $4.99 to $19.99/user.
Net2Phone offers cloud and hosted PBX VoIP services. Its SIP trunking plan reportedly costs $19.99 per month.
Asterisk is a free open-source framework for building customized communications applications, such as VoIP gateways and IP PBX systems.
Talkroute is a virtual phone system that helps manage business communications, suchlike VoIP, landline, and mobile. Fees range from $19–$99+/month.
bvoip is a channel-only VoIP service provider that offers a scalable cloud-based UC tool. Its solution and prices are customized.
babyTEL is a VoIP service provider that offers unified telephony and communications solutions. Its monthly fees range from $17 to $27 per user.
Fuze is a unified communications (UC) platform that provides video conferencing, VoIP, messaging, and collaboration tools. Prices are customized.
FusionWorks Suite is a UC and VoIP provider that offers reliable telephony solutions. Its business VoIP’s monthly fees start at $19.95 per user.
CommuniGate Pro is a platform that features data access and VoIP subsystems among others. Its license fee for 25 users reportedly costs $1,299.
ClarityTel is a VoIP provider that offers cloud-based telephony solutions. It costs $24.99 per line, per month for those who need one to nine lines.
Comcast Business is a VoIP provider that offers private branch exchange (PBX) trunking and cloud-based phone solutions.