TekSIP is described as 'SIP Registrar and SIP Proxy for Windows. TekSIP supports UDP, TCP, TLS and WebSocket (IPv4 & IPv6) transports. TLS and Secure WebSocket are supported in only commercial editions. TekSIP is tested on Microsoft Windows Vista, Windows 7/8/10/11 and Windows 2008-2022' and is an app in the audio & music category. There are 1 alternatives to TekSIP for Mac, Linux, BSD, Cygwin and Oracle Solaris. The best TekSIP alternative is Asterisk, which is both free and Open Source.
Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions.
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