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Type. Collaborative software. License. Apache License 2.0. Website. zulip .com. Zulip is an open source chat and collaborative software created by Jeff Arnold, Waseem Daher, Jessica McKellar, and Tim Abbott in 2012. [ 3][ 4] Today, it is one of the free and open source alternatives to Slack, [ 5] with over 40,000 commits contributed by 660 people.
Skype was founded in 2003 by Niklas Zennström, from Sweden, and Janus Friis, from Denmark. [ 15] The software was created by Estonians Ahti Heinla, Priit Kasesalu, Jaan Tallinn, and Toivo Annus. [ 16] Friis and Annus are credited with the idea of reducing the cost of voice calls by using a P2P protocol like that of Kazaa. [ 17]
Pidgin (formerly named Gaim) is a free and open-source multi-platform instant messaging client, based on a library named libpurple that has support for many instant messaging protocols, allowing the user to simultaneously log in to various services from a single application, with a single interface for both popular and obsolete protocols (from AIM to Discord), thus avoiding the hassle of ...
Zoom (software) Zoom (stylized as all lowercase) is a proprietary videotelephony software program developed by Zoom Video Communications. The free plan allows up to 100 concurrent participants, with a 40-minute time restriction. Users have the option to upgrade by subscribing to a paid plan, the highest of which supports up to 1,000 concurrent ...
Online chat. License. Proprietary. Website. camfrog .com. Camfrog is a video chat and instant messaging client that was created by Camshare in October 2003. [ 4] The app allows users to contact others worldwide and find or create chat rooms to gather communities that share similar interests. [ 5][ 6][ 7]
Element (formerly Riot and Vector[ 11]) is a free and open-source software instant messaging client implementing the Matrix protocol. [ 12] Element supports end-to-end encryption, [ 13] private and public groups, sharing of files between users, voice and video calls, and other collaborative features with help of bots and widgets.
Paltalk is a proprietary video group chat service that enables users to communicate by video, Internet chat, or voice. [ 3] It offers chat rooms and the ability for users to create their own public virtual chat room. Paltalk Desktop is available on macOS and Windows, and Paltalk Video Chat App is available for Android and iOS.
Mattermost is an open-source, self-hostable online chat service with file sharing, search, and integrations. It is designed as an internal chat for organisations and companies, and mostly markets itself as an open-source alternative to Slack [ 6][ 7] and Microsoft Teams .