IVR Systems
Open-source communication framework powering IP PBX systems, VoIP gateways, and conference servers used by millions worldwide.
Free plan
199951-200Williamsville, NY
Business VoIP
Voice over IP phone systems designed for business communications.
Unified Communications
European white-label cloud PBX for service providers.
Usage-based · Free trial
200911-50Amsterdam, Netherlands
Business VoIP
MENA cloud contact center and Arabic VOIP platform for enterprises across the Gulf region.
Usage-based · Free trial
201551-200Amman, Jordan
CPaaS (Communications Platform as a Service)
Open-source SIP server providing VoIP, WebRTC, and real-time communication services with high scalability and flexible routing.
Free · Free plan
20051-10Community Project
O
Unified Communications
Cloud business phone system with hosted PBX and video.
Tiered plans · Free trial
200451-100New York, NY
Unified Communications
Business VoIP phone service with SIP trunking and mobile apps.
Per seat · Free trial
19971-50San Jose, CA
Unified Communications
Business VoIP and virtual phone system.
Starts at $19.95/mo
201111-50Atlanta, GA
Business VoIP
Cloud-based contact center and VoIP solution for outbound teams.
Usage-based · Free plan
20121-50Tel Aviv, Israel
Unified Communications
Class 5 VoIP platform for service providers with open-source roots.
Custom quote · Free plan
200751-100Vienna, Austria
Unified Communications
Sangoma's full-spectrum communications solution with voice, video, chat, and fax.
Custom quote
2006101-250Sarasota, FL
Unified Communications
UK cloud phone system and SIP trunking for businesses.
Starts at £9.50/user/mo
200511-50Sheffield, UK
Patient Communication Platforms
Dental-focused VoIP communications platform that integrates with dental PMS systems for call pops and texting.
Tiered plans · Free plan
201051-200Sandy, UT
Unified Communications
Cloud-based business VoIP phone service with concierge onboarding and US-based support for SMBs.
Custom quote
20081-50Denver, CO
Unified Communications
UK cloud phone system tailored for small businesses.
Per seat · Free trial
2014Solo / freelancerLondon, UK
Customer Experience Platforms
Business communications platform providing VoIP phone, video conferencing, CRM integrations, and customer experience management.
Tiered plans
20061-50Scottsdale, AZ
Customer Experience Platforms
Cloud telephony and unified communications for CRM users.
$50-$500/month
200651-200Leicester, UK
Customer Experience Platforms
Cloud PBX and VoIP platform for business calls, virtual numbers, and contact center.
Tiered plans · Free plan
200651-200Limassol, Cyprus
Unified Communications
Business VoIP platform (now part of Sangoma/NetFortris).
Per seat
2004501-1,000Markham, Canada
Unified Communications
UK cloud communications with CallSwitch Pro platform.
Custom quote
201351-100London, UK
Business VoIP
Open-source web-based GUI for managing Asterisk PBX providing a full-featured phone system with modules for extensions, trunks, and IVR.
Free / Commercial modules available
200451-200Williamsville, NY
Business VoIP
Unified communications platform combining business phone, video conferencing, chat, and file management for mid-market businesses.
Starts at $27.99/user/mo
1995501-1,000Mountain View, CA
Business VoIP
Cloud phone system with AI-powered features providing business communications, video conferencing, and contact center solutions.
Starts at $25.99/user/mo
1996501-1,000Newark, NJ
Business VoIP
Browser-based unified communications platform with WebRTC technology providing sales-focused communication tools for businesses.
Contact for pricing
2005201-500Tallinn, Estonia
Business VoIP
Enterprise cloud communications platform with global voice, video, messaging, and contact center for distributed organizations.
Contact for pricing
2006201-500Boston, MA
Business VoIP
African calling platform offering international voice calls and B2B voice solutions across the continent.
Custom pricing
200751-200Amsterdam, Netherlands
Business VoIP
Cloud communications platform offering virtual numbers, IVR, and call analytics to Indian businesses.
Custom pricing
2009201-500Bangalore, India
Business VoIP
Cloud telephony and communications platform offering voice, SMS, and contact center for businesses.
Custom pricing
2011201-500Bangalore, India
Business VoIP
Mobile telecom and VOIP platform offering business numbers and global calling.
Custom pricing
201251-200Shanghai, China