Slack is the broader, more established team communication tool and wins for teams that want depth, integrations, and a mature ecosystem. Microsoft Teams is the more focused alternative that trades breadth for a simpler, more specialized experience. If you need maximum capability and ecosystem, choose Slack; if a leaner, more focused tool fits your team, Microsoft Teams is worth a close look.
Quick comparison
| Feature | Slack | Microsoft Teams |
|---|---|---|
| Starting price | Free plan | Free plan |
| Free plan | Yes | Yes |
| Open source | No | No |
| Self-hostable | No | No |
| G2 rating | Not listed | Not listed |
| Best for | teams wanting a mature, full-featured team communication tool | teams wanting a focused, simpler team communication tool |
| Starting price | Slack offers a free plan. | Microsoft Teams offers a free plan. |
| Free plan | Yes | Yes |
| Open source | No | No |
| Self-hostable | No | No |
| Primary tradeoff | Slack fits best when its default workflow already matches the team, while Microsoft Teams is stronger when its focus maps more closely to the work being managed. | Microsoft Teams fits best when its default workflow already matches the team, while Slack is stronger when its focus maps more closely to the work being managed. |
| Best for | teams wanting a mature, full-featured team communication tool | teams wanting a focused, simpler team communication tool |
Messaging and channels
Slack is channel-based messaging for work; Microsoft Teams is chat and meetings in Microsoft 365. On raw capability and feature depth, Slack is the stronger of the two — it covers more of the team communication tool workflow out of the box and handles edge cases that Microsoft Teams only reaches through workarounds or add-ons. Microsoft Teams keeps a deliberately narrower surface area, which is a feature for teams that find broader tools cluttered. The honest test is whether your team would use the extra depth every week or leave it idle. Map your three most common team communication tool tasks against each product before deciding, because feature lists rarely predict daily fit.
Calls and meetings
For everyday usability and onboarding, Microsoft Teams is the easier of the two to live with. Microsoft Teams gets a team to first value with less configuration, while Slack asks for more upfront structure and setup. Both Slack and Microsoft Teams reward teams that adopt their default workflow rather than fighting it. Adoption is where most team communication tool rollouts succeed or stall, so weigh who opens the tool every day — and how much training they will tolerate — more heavily than any single capability. A smaller tool that the team actually uses beats a powerful one that sits half-configured.
Admin and compliance
Neither Slack nor Microsoft Teams is open source, so control comes down to data export, portability, and how much you depend on each vendor's roadmap. Slack offers more depth here through richer admin settings, export options, and APIs, while Microsoft Teams keeps things simpler at the cost of some configurability. If avoiding lock-in is a priority, confirm both products' export formats and API limits before you store years of team communication tool data in either one. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Pricing and value
On price, Microsoft Teams is the better value for most teams. Slack offers a free plan; Microsoft Teams offers a free plan. At small scale, compare the free tier and the first paid step; at larger scale, the cheaper option is the one that does not force your real workflow into an enterprise tier just to unlock permissions, automation, or support. Slack can still win on total cost if it replaces other tools you already pay for, so price the whole stack, not just the per-seat sticker. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Integrations and ecosystem
Slack has the broader ecosystem — more native integrations, a larger community, and more templates, guides, and people who already know it. Microsoft Teams connects to the common tools but leans on a smaller marketplace for anything niche. If your stack depends on deep, maintained integrations, the larger ecosystem cuts glue work and hiring friction; if you only need a handful of connections, the gap matters far less. Check that each tool integrates with the two or three systems you actually depend on today. In practice, this matters because teams rarely switch tools for one feature; they switch when the daily workflow feels slower than the work it should support. Test one real use case in each before committing.
Pricing deep-dive
Slack
- Free plan: $0 — covers core team communication tool use with limits on seats, usage, or history.
- Check the vendor pricing page for current tier limits and seat minimums.
Microsoft Teams
- Free plan: $0 — covers core team communication tool use with limits on seats, usage, or history.
- Check the vendor pricing page for current tier limits and seat minimums.
Pricing verdict: Slack offers a free plan; Microsoft Teams offers a free plan. Slack has a free plan and Microsoft Teams has a free plan. For most teams Microsoft Teams is the lower-cost choice on the entry tiers. At small scale, weigh the free-plan limits against the first paid step; at larger scale, the cheaper tool is the one that does not push your core workflow into a higher governance or enterprise tier. Always confirm current pricing on each vendor's page before you commit.
How to migrate from Slack to Microsoft Teams
What real users say
Slack: Slack users praise its fit for teams wanting a mature, full-featured team communication tool, and most complaints center on price at scale or features they do not need.
Microsoft Teams: Microsoft Teams users praise its fit for teams wanting a focused, simpler team communication tool, and most complaints center on gaps in depth, integrations, or polish versus the larger incumbent.
Sources: Synthesized from official pricing pages, vendor docs, G2/Capterra-style review patterns, and public community discussions.
Final verdict
Choose Slack if...
- Choose Slack if you want the broader, more capable option and the team will use it as the primary team communication tool.
- Choose Slack if mature integrations, community, and available expertise matter more than squeezing the lowest price.
- Choose Slack if its workflow already resembles how your team works, keeping switching and training costs low.
Choose Microsoft Teams if...
- Choose Microsoft Teams if you want a leaner, more focused tool rather than bending Slack to fit.
- Choose Microsoft Teams if a leaner, more focused tool would see better day-to-day adoption than a broader platform.
- Choose Microsoft Teams if its strengths line up with your top team communication tool workflow instead of forcing the team into the wrong defaults.
Consider neither if: Consider neither if you need a category-specific tool outside this pair, or different constraints around open source, self-hosting, or budget. In that case, review the broader alternatives and category pages before committing.