What tools do you use to keep remote teams on the same page when it comes to projects information, company announcements, documentation, document search? When I ask people around me I get all different answers: from Slack only, to having a wiki like Confluence to a SharePoint Intranet to internally developed tool at larger tech companies.
A reliable wiki with a newsfeed like feature - pretty much Confluence (on-demand or on-prem)
Slack or Teams for live chat.
But more important than tools, process. People have to use them consistently for them to matter.