Nextcloud Hub is a fairly good option, and has components/integrations to support many business activities. https://nextcloud.com/blog/nextcloud-hub-20-debuts-

Nextcloud Hub is a fairly good option, and has components/integrations to support many business activities. https://nextcloud.com/blog/nextcloud-hub-20-debuts-dashboard-unifies-search-and-notifications-integrates-with-other-technologies/ https://nextcloud.com/blog/nextcloud-hub-20-debuts-dashboard... - federated file sharing - real-time collaboration (e.g. via OnlyOffice or Collabora) - calendars - video conferencing - kanban - webmail - webhooks and push notifications - discussions and mailing lists via Discourse - Matrix/Element, Mattermost, or Rocket.Chat, IRC, and Slack integration - Github and GitLab integration - help desk via Zammand Nextcloud is not without shortcomings. But, it's strengths are being federated, open-source, and integrated with an exosystem of open-source community and productivity tools. One additional note, our small cooperative uses a managed version of Nextcloud from Web Hosting. The cost starts at $35/month for fully managed or $7/month to update Nextcloud manually via the settings page (which is surprisingly simple). The Web Hosting Web page and sign-up process are slightly klunky, but their customer care has been excellent in my experience. https://webo.hosting/ https://webo.hosting/