Zoiper is described as 'IAX & SIP multilanguage and multiplatform (Windows, Linux and Mac OS X) softphone is a VoIP soft client, meant to work with any IP-based communications systems and infrastructure' and is an app in the social & communications category. There are more than 25 alternatives to Zoiper for a variety of platforms, including Windows, Android, iPhone, Mac and iPad apps. The best Zoiper alternative is Jami, which is both free and Open Source. Other great apps like Zoiper are Jitsi Desktop, Wire, Zulip and Linphone.
Open source decentralized communication platform supporting secure end-to-end encrypted calls, messaging, group conferencing, file and media sharing, SIP compatibility, multi-device sync, and strong privacy, available across desktop and mobile systems.
Jitsi Desktop (previously SIP Communicator) is a legacy audio/video and chat communicator with full encryption, precedessor of Jitsi Meet .
Secure communication platform featuring encrypted chats and calls, file and media sharing, self-deleting messages, device verification, group collaboration, and customizable settings. Supports use across multiple devices with no phone number required for access.
Threaded group conversations combine live and asynchronous messaging, separating topics for organized collaboration, supporting open-source, cloud, and self-hosted deployments, secure communication with encryption, and multi-platform access for diverse teams.
Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.
Video conversations with up to 8 people in your browser - no downloads, no login. Just name your channel and you are on. Works in all modern browsers, even mobile.
MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack. It allowing to do high quality VoIP calls (P2P or on regular telephones) via open SIP protocol. From cloud of SIP providers you can choose best for you, register account and use it with MicroSIP. You'.
Free, native Windows SIP softphone with HD audio, SRTP encryption, multi-account support and a C# Plugin SDK. Works with any SIP provider.
3CX is a software-based, open standards IP PBX that offers complete Unified Communications, out of the box.
Offers a free trial period, after with you need to upgrade to paid subscription.
On-Meet is a free video conferencing platform that allows you to share your knowledge with your friends, colleagues and family.
Canada
United States
Switzerland
France
EU
Norway
Cyprus
Sound quality, open source, multiplatform, multi channels, and a long list of features