IceWarp is described as 'integrates all communication & collaboration features in one unified solution. Available in cloud or for on-premises deployment, IceWarp is a great tool to share and exchange all information and ideas online, offline or via mobile devices' and is a team collaboration tool in the office & productivity category. There are more than 50 alternatives to IceWarp for a variety of platforms, including Online / Web-based, Windows, Linux, Mac and Android. The best alternative is Slack, which is free. Other great apps like IceWarp are Microsoft Teams, Zoho, Google Workspace and Ripcord.
Slack is a unified communication platform built with an optimized workflow to keep modern teams focused and productive. A familiar chat interface facilitates discussions while advanced features are easily exposed based on context.
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.