15 Best Slack Alternatives for businesses in 2026
What Is a Slack Alternative? A Slack alternative is a cloud-based team communication platform that replaces Slack’s messaging, file sharing, and integration capabilities for workplace collaboration. Slack is owned by Salesforce, confirmed in Salesforce’s December 2020 investor filing disclosing a $27.7 billion acquisition, and competes with 15 confirmed alternatives including Microsoft Teams, Mattermost, and Discord….