Slack vs. Microsoft Teams for SMBs: which tool should you choose?

Slack and Microsoft Teams are both solid collaboration tools, and neither is universally "better." The right pick depends on what your team already uses, how many people need access, and what you're willing to spend. This guide walks you through a structured decision process so you choose the tool that actually fits, and manage it properly once it's running.

What you need before you compare

Before diving into features and pricing, get a few basics straight. You'll need a rough headcount, clarity on which productivity suite your company runs (Microsoft 365 or Google Workspace), and a quick list of the apps your team depends on daily.

Both Slack and Teams offer free tiers, but the meaningful differences only show up in paid plans. One important detail many SMBs miss: Microsoft now sells Microsoft 365 in "with Teams" and "without Teams" versions following EU regulatory changes. Teams is no longer automatically bundled in every plan, so check what your specific plan actually covers before assuming you already have it.

Step 1: Audit your current software environment

Start by confirming whether your company runs Microsoft 365 or Google Workspace. If you're on Microsoft 365, verify whether your plan includes Teams or whether you're on a version without it. This single check can save you from paying twice for similar functionality.

If your company uses Google Workspace, you'll have Google Chat and Meet built in, but neither is a full Teams equivalent, and many teams that want a dedicated chat-first hub add Slack instead. Slack is the cleaner standalone choice here because it connects to Google Drive, Google Calendar, and Gmail without extra configuration. Review your existing integrations and note any overlapping tools. Many SMBs discover they're already paying for multiple platforms that duplicate the same communication features.

Step 2: Compare pricing at your team size

Map out per-user costs for each tier, including what you already pay through existing licenses. For SMBs whose Microsoft 365 plan already includes Teams, there may be zero additional cost for your messaging and video calling needs. That's hard to beat on paper.

If your Microsoft 365 plan is a version without Teams, you'll need to factor in either the standalone Teams Essentials license (around $4 per user per month) or a Slack subscription as a like-for-like comparison. For Google Workspace teams, Slack Pro (around $7.25 per user per month, billed annually) is usually the most straightforward add-on. At 50 users, that's roughly $4,350 per year, so the pricing conversation matters more than it looks at first glance.

One caveat before you budget: Microsoft has pricing changes scheduled for July 1, 2026, so confirm the current rates for your plan rather than relying on older figures.

Step 3: Evaluate daily collaboration features

Features only matter if they match how your team actually works. Slack excels at channel organization and threaded conversations. If your team communicates asynchronously, with people in different time zones or on different schedules, Slack's threading model keeps discussions organized without flooding everyone's screen.

Teams is stronger for video calls and deep document co-editing inside Microsoft apps. If your team spends half the day in Word, Excel, or PowerPoint, Teams lets you co-author files without leaving the conversation window. With roughly (SQ Magazine) 320 million monthly active users globally as of early 2024, climbing to around 360 million by mid-2025, Teams clearly dominates in organizations that are already Microsoft-centric.

Slack, by contrast, is estimated at roughly 79 million monthly active users (DemandSage), carving out a strong niche among teams that prioritize chat-first workflows over meetings-first ones. Ask yourself honestly: does your team default to quick messages or scheduled video calls? That habit may also guide your decision.

Step 4: Check integration depth with your core tools

Slack's app directory is broader, with over 2,600 apps and services available, and companies on Slack use more than 200 connected apps on average. If your stack includes tools like Salesforce, Jira, Figma, or Notion, Slack's ecosystem tends to offer deeper native connections.

Teams integrates more tightly with SharePoint, OneDrive, and Planner. If your file storage and project management already live inside Microsoft's ecosystem, Teams pulls everything into one interface without extra setup. A practical exercise: list your five most-used apps, then check each platform's integration directory. Native integration quality varies, and a half-working connector is worse than none at all.

Step 5: Plan license management from day one

This is the step most SMBs skip, and it's where costs quietly spiral. Decide who owns provisioning and deprovisioning of seats before you roll out either tool. Without a clear owner, unused licenses pile up every time someone leaves the company or switches roles.

This is where an all-in-one IT platform earns its keep. With deeploi, software licenses are assigned automatically when a new hire is created in your HR system, and reclaimed automatically the moment someone is offboarded, so a seat never sits paid-for and unused after an employee leaves. You also get a central overview of which tools are assigned across the company, which makes it easy to spot duplicate or unnecessary licenses before they quietly inflate your software bill. For SMBs without a dedicated IT team, that automation is the difference between staying on top of license costs and discovering the waste only at renewal.

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Common rollout pitfalls to avoid

The biggest risk isn't picking the wrong tool. It's a half-hearted rollout. Three pitfalls catch most SMBs:

1. No firm migration date. If you don't set a clear cutover, people default to old channels like email or WhatsApp groups. Redirect existing workflows explicitly: move recurring meetings into the new platform, set up project channels, and archive old communication threads.

2. License creep. Schedule quarterly reviews to catch unused seats before renewal hits. Even a 20-person team can accumulate three to five dormant licenses within six months, and at $7 to $12 per seat per month, that adds up quietly. A useful rule of thumb: if someone hasn't logged in for 60 days, flag the license for review.

3. Manual deprovisioning. Relying on someone to remember to remove a leaver's seat is where most waste comes from. Automating offboarding, so licenses are reclaimed the moment an employee is removed from your HR system, removes most of this risk without manual tracking.

FAQ

Can I use Slack and Teams together?

Technically yes, but running both creates confusion and duplicate costs. People won't know where to post, conversations get fragmented, and you end up paying for two tools that serve the same purpose.

How do I avoid paying for unused licenses before renewal?

Use a centralized IT management platform that reclaims licenses automatically when employees leave and shows you which tools are still in active use. deeploi does this out of the box, so dormant seats don't slip through unnoticed before a renewal date.

Is Teams still free with Microsoft 365?

Not always. After EU regulatory changes, Microsoft now offers Microsoft 365 in versions with and without Teams, plus Teams as a standalone license. Check exactly what your plan includes before assuming it's bundled. The standalone Teams Essentials plan starts at around $4 per user per month, which changes the cost comparison depending on your setup.

Pick the tool, then manage it properly

The best choice usually follows your existing ecosystem and licensing. If your Microsoft 365 plan already includes Teams, that's often the path of least resistance. Google Workspace teams tend to lean toward Slack. Either way, the tool itself is only half the decision. The other half is making sure licenses, accounts, and access stay organized as people join, leave, and change roles.

That's the part deeploi automates. It handles employee onboarding and offboarding end to end, including assigning and reclaiming software licenses, so your collaboration stack stays clean and cost-effective as you scale.