Microsoft 365 vs Slack
A side-by-side comparison of Microsoft 365 and Slack — two options for productivity & collaboration. Pricing, features, and honest pros and cons.
Category
Productivity & Collaboration
Productivity & Collaboration
Rating
4.6 / 5
4.3 / 5
Pricing
From $7/user/mo
Freemium
Best for
Firms standardizing on Excel-centric workflows with enterprise security
Deal teams coordinating internally and with partners
Key features
- Word, Excel, PowerPoint desktop and web apps
- Outlook email and calendaring with Exchange
- Teams meetings, chat, and telephony options
- SharePoint and OneDrive document management
- Enterprise-grade security, compliance, and admin controls
- Channels and DMs
- Huddles and clips
- App integrations
- Slack Connect
- Workflow automation
Pros
- Ubiquitous — Excel remains the lingua franca of PE analysis
- Deep security and compliance tooling for regulated firms
- One vendor covers email, docs, meetings, and storage
- Ubiquitous, easy team communication
- Huge integration ecosystem
- Slack Connect for external parties
Cons
- Admin complexity across licensing tiers and add-ons
- Teams and SharePoint UX draw persistent user complaints
- July 2026 price increases raised per-seat costs
- Can fragment attention
- History and features gated by tier