Google Workspace is described as '(formerly Google Apps for Work / G Suite) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names' and is a very popular team collaboration tool in the office & productivity category. There are more than 25 alternatives to Google Workspace for a variety of platforms, including Online / Web-based, Windows, Self-Hosted solutions, Linux and Android. The best alternative is ONLYOFFICE, which is both free and Open Source. Other great apps like Google Workspace are CryptPad, Microsoft 365, Mailo and Zimbra Collaboration Suite.
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
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.