Stay free if you only need chat, calling, and meetings for up to 100 participants and 10 gb team file storage plus 2 gb personal storage. Upgrade if you need teams with unlimited meeting duration and web versions of office apps (word, excel, powerpoint). Most solo builders can start free.
Why it matters: Overwhelming interface for simple communication needs vs Slack's streamlined chat experience
Available from: Microsoft Teams Essentials
Why it matters: Requires Microsoft 365 investment to realize value - standalone Teams Essentials lacks key integrations
Available from: Microsoft Teams Essentials
Why it matters: Performance issues in large organizations with thousands of users and complex team structures
Available from: Microsoft Teams Essentials
Why it matters: Less intuitive user experience compared to Slack, especially for non-Microsoft users
Available from: Microsoft Teams Essentials
Why it matters: Limited third-party integration ecosystem compared to Slack's extensive app marketplace
Available from: Microsoft Teams Essentials
Why it matters: Can be expensive for small businesses: $22/user for Premium vs simpler collaboration alternatives
Available from: Microsoft Teams Essentials
Choose Teams if you use Microsoft 365 apps (Word, Excel, Outlook) - it's essentially free with Business Basic ($6/month) vs Slack Pro ($7.25) + productivity apps separately. Choose Slack if you prioritize user experience and don't need deep Office integration.
Teams via Microsoft 365 Business Basic: $720/year (includes Office apps). Slack Pro: $870/year + ~$720 for Google Workspace = $1,590/year total. Teams saves $870 annually when you factor in productivity suite costs.
Yes, Teams is included with all Microsoft 365 Business and Enterprise plans. However, the standalone Teams Essentials ($4/month) lacks Office app integration that makes the full experience valuable.
Yes, Teams can serve as a complete cloud-based phone system with calling, voicemail, auto-attendant, and number porting. This can eliminate separate PBX costs but requires careful planning for call quality and reliability.
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Last verified March 2026