YakYak Alternatives

tomeko.net/software: SIP client for Windows.

PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

Application and Data, Collaboration, and Web and Video Conferencing

Open Source

White-label VoIP Softphone with WebRTC and Auto-provisioning

Empower Creation and Ensure Brand Consistency. Build and Share libraries of visual assets with your entire team — all from your desktop.

Open Source

Softphone for VoIP, CAPI und TAPI.

Linphone is an internet phone or Voice Over IP phone (VoIP).

Open Source

WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.

free

Open-source video calling and chat platform.

SessionTalk Desktop Softphone is a feature rich SIP Client for Windows devices with Video, Messaging, Push Notifications, Encryption, Dial Plan, Call Transfer and Call Recording.

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

VoIP and video calling, messaging and presence - all from your computer desktop with the award-winning Bria 5 softphone client.

Comwave is a state-of-the-art communication service and rich solution providing a platform that is designed for modern businesses to streamline their growth with an agile approach.