Microsoft Lync is described as 'Lync enables users to communicate securely anywhere they have network connectivity, and automatically adapts to network conditions. The unified communications platform integrated into Microsoft Office includes IM, Audio, Video, Web and Conferencing' and is a Instant Messenger in the Office & Productivity category. There are more than 25 alternatives to Microsoft Lync for a variety of platforms, including Online / Web-based, Windows, Mac, Android and Linux. The best alternative is Jitsi, which is both free and Open Source. Other great apps like Microsoft Lync are Skype (Freemium), Wire (Free Personal, Open Source), BigBlueButton (Free, Open Source) and Trillian (Freemium).
Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full encryption that supports protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!, GTalk/Hangouts extensions, as well as OTR, ZRTP, etc.
Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice call over the internet. Users can also call landlines and mobiles at competitive rates using Skype credit, premium accounts and subscriptions.
Wire is the most secure collaboration platform featuring messenger, voice, video, conference calls, file-sharing, and external collaboration –all protected by the most secure end-to-end-encryption. Why Wire?
Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as text messages on your phone.
Cisco Webex is the leading enterprise solution for video conferencing, online meetings, screen share, and webinars. • Share documents, presentations, and applications. • Take advantage of integrated voice conferencing. • Record meetings for those who missed the session.
Glip is instant messaging for teams and businesses to communicate and get work done at the same time. In Glip you work where your conversations are, so you always know what your team is doing and what needs to get done next.
GoToMeeting is an online meeting, desktop sharing, and video conferencing software package that enables the user to meet with other computer users, customers, clients or colleagues via the Internet in real time.