Convo vs Rocket.Chat

Bitrix24

A Comprehensive Social Workplace Solution

Trello

A team collaboration tool that lets you manage projects and tasks

ClickUp

A Comprehensive Productivity and Project Management Tool

Miro

Visual Collaboration Platform

Wrike

A project management and collaboration platform

Slack

A cloud-based platform for team communication and collaboration

Mattermost

An open-source team messaging app

Zulip

Team Chat

Skype

Communication solution with voice, video, messaging, and file transfer

Microsoft Teams

Online service for video and web conferencing, meetings, calls, and collaboration from Microsoft