Issabel
Your Open Source Solution For Unified Comunnications And More…
18 Alternatives To Issabel
3CX Phone System
3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such…
Asterisk
An open source telephony switching and private branch exchange service for Linux.
AsteriskNOW
AsteriskNOW is the fastest way to get started building custom telephony solutions with Asterisk.
Cloud Telephony
Cloud Telephony delivers automated telephone applications to any phone, any place, anytime.
Dialpad
Switch is a cloud-based phone system built for Google Apps users.
Dimelo By RingCentral
Dimelo, Unified management platform for your digital conversations
FusionPBX
FusionPBX is an open source FreeSWITCH GUI.
Kamailio
Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under…
PBX in a Flash
PBX in a Flash is a PBX system based on Asterisk, FreePBX and CentOS, coming as an ISO download.
Starfish PBX
Starfish PBX aims to be an open source alternative to Digium’s Switchvox.
The Incredible PBX
Incredible PBX is a secure and feature-rich implementation of the Asterisk® PBX.
Twilio
Brings voice and messaging to your web and mobile applications.
VitalPBX
VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.
Wazo
Wazo is a unified communications platform based on Asterisk and focused on extensibility.
freepbx
FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
inContact
inContact provides on-demand software that enables call centers to engage and support their customers.
opensips
OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server.
uContact
uContact is an contact center solution that includes ACD, recording, dialers, CRM, WFM, quality, call reporting, live monitoring, IVR, SMS, web chat with audio and video, gamification and many others features.