GroupOffice vs. Slack

GroupOffice is an open-source groupware and CRM platform for enterprises and the public sector. It’s created and maintained by the Dutch company Intermesh. You can self-host the software or run it on Intermesh’s secure cloud infrastructure, where your data remains fully private. Collaborate with integrated file sharing, video conferencing, E-mail, calendar and contact management, project and time tracking, quoting and invoicing, support ticketing, and the Collabora Online office suite.

Slack is your single workspace that connects you with the people and tools you work with everyday, no matter where you are or what you do. With Slack you get real-time messaging through calls and chat, a searchable record of all your files and conversations, and integrations with a growing number of handy bots and apps. Now everyone can finally be on the same page and get their work done. Slack: It’s where work happens.