Mostlymatter is described as 'Fork of Mattermost meant to remove the users and messages limits. Mattermost open source platform for secure collaboration across the entire software development lifecycle' and is a Group Chat app in the social & communications category. There are more than 10 alternatives to Mostlymatter for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Web-based apps. The best Mostlymatter alternative is Jitsi Meet, which is both free and Open Source. Other great apps like Mostlymatter are Slack, Mattermost, Zoom and Infomaniak kMeet.
Go ahead, video chat with the whole team. In fact, invite everyone you know. Jitsi Meet is a fully encrypted, 100% open source video conferencing solution that you can use all day, every day, for free.
Offers unified communication for teams with advanced real-time messaging, contextual features, versatile chat tools, and organized conversations in dedicated channels with integrated file sharing on Mac, Windows, Linux, and mobile platforms for enhanced productivity.
Self-hosted collaboration platform featuring chat, workflow automation, voice and video calling, screen sharing, AI capabilities, broad third-party integration support, cross-platform apps, compatibility with Slack imports, and flexible deployment options for secure team communication.
Provides video conferencing with high-quality video and screen sharing, supporting up to 100 participants, real-time whiteboard collaboration, group messaging, and VoIP. Compatible across devices including smartphones and PCs, offering flexibility for remote meetings.
kMeet is an unlimited, free, Swiss solution for organising encrypted video-conferences.
Powered by WebRTC, Real-time video call, chat room and screen sharing entirely browser based.
Self-hosted communication platform with secure audio, video, chat, web conferencing, screensharing, advanced encryption, and metadata privacy, running on user-controlled servers, supporting web and mobile apps, and eliminating third-party data exposure.
Element Pro is a secure enterprise communication app built on the Matrix protocol, designed for organizations that need encrypted, compliant, and fully controlled collaboration. It combines real-time messaging, voice and video calls, and file sharing with strong administrative...
A comprehensive collaboration platform within Office 365, providing centralized chat, file sharing, and HD video meetings. Accessible on multiple platforms, it offers enterprise-grade security and compliance, customizable notifications, and private to group chat sessions.
HD video and audio meetings for up to 250 participants with real-time captions, international dial-in, screen and presentation sharing, secure browser-based access, calendar scheduling, chat messaging, file sharing, and adaptive video quality for remote teams.
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It is the closest to Mattermost. Since it is a fork from the Mattermost