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An open source telephony switching and private branch exchange service for Linux.
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FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
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FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
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FusionPBX is an open source FreeSWITCH GUI.
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Global Phone System 100% native in Salesforce CRM.
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Kamailioยฎ (successor of former OpenSER and SER) is an open source SIP server released under...
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VoipSwitch provides complete VoIP and unified communications solutions.
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XiVO, premiรจre solution de tรฉlรฉphonie d'entreprise ToIP Open Source. TPE/PME Grande Entreprise / Centre de contact / Secteur Public. Contact: 04 37 49 78 10.
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Thirdlane Multi Tenant PBX provides a comprehensive and secure communication solution for businesses, MSPs and resellers. It offers a versatile platform with robust features and unparalleled value, all backed by Thirdlane's renowned reputation. .
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Cloud Telephony delivers automated telephone applications to any phone, any place, anytime.
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Incredible PBX is a secure and feature-rich implementation of the Asteriskยฎ PBX.
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VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.
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sipXcom open source unified communications software is the standard for enterprise voice solutions. Voice, chat, IVR, presence and more in one application.
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Your Open Source Solution For Unified Comunnications And Moreโฆ.
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Social & Communications and Development.
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A SIP based implementation of a PBX / unified communications system.
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The UCaaS Platform Built for MSPsโ.
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SIP Softswitch for Windows with PBX, billing and business features.
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PBX in a Flash is a PBX system based on Asterisk, FreePBX and CentOS, coming as an ISO download.
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SIP proxy server implementation compliant to RFC3261, written in C++11 started in 2011.