Slack vs Microsoft Teams: Which Is Better in 2026?
Affiliate disclosure: links to both tools are affiliate links — we may earn a commission at no cost to you. Our comparison is based on editorial research.
This is the rare software comparison where the deciding factor usually sits outside the product itself: most teams weighing these two are really deciding whether their communication hub should be a separate purchase or something inherited from a suite they already pay for. Microsoft makes that plain on its own pricing page, where Business Basic, Standard and Premium each appear in a with-Teams and a no-Teams version, while Slack is only ever sold on its own. The buyers genuinely torn here are the ones already holding Microsoft 365 licenses whose people keep drifting back to Slack anyway.
| Slack | Microsoft Teams | |
|---|---|---|
| Our rating | 4.4/5 | 4.2/5 |
| Price from | $0 (Free); paid from $7.25/user/mo | Free (paid from $4/user/mo) |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✓ |
| Pricing model | Freemium; per-user subscription billed monthly or annually | Freemium plus per-user subscription (billed annually; monthly available at higher rates) |
| Best for | Remote and hybrid teams juggling many integrated tools | Organizations already standardized on Microsoft 365 wanting one hub for chat, meetings and files |
| Standout | Team Chat | Team Chat |
| Platforms | Web, Windows, macOS, Linux, iOS, Android | Windows, macOS, Linux, iOS, Android, Web |
The channel-based messaging hub that turned team chat into a category
WHY PICK IT- Deepest integration ecosystem: 2,600+ apps plus unlimited connections on paid tiers
- Slack AI now bundled into paid plans (was a ~$10/user add-on) — search, recaps, huddle notes
- Slack Connect shares channels with clients and external orgs without email
The Microsoft 365-native hub for chat, meetings, and calls
WHY PICK IT- Deep native integration with Word, Excel, PowerPoint, Outlook and SharePoint for real-time co-authoring
- Generous free tier: unlimited chat plus 60-minute, 100-participant group meetings
- Paid meetings scale to 30 hours and up to 1,000 interactive participants (10,000 view-only)
The verdict
Choose Slack if your stack is a patchwork of best-of-breed tools and a real share of the work happens with people outside your own org, since unlimited app integrations from Pro upward and group external messaging through Slack Connect are built for precisely that pattern. The cost is a per-seat bill for chat alone, plus a Free tier whose 90-day history cap makes it a trial rather than a permanent home.
Choose Microsoft Teams if Microsoft 365 already anchors your organization, because Teams then arrives inside a bundle that also covers business email, Office and storage rather than as one more line item to defend. The trade is scope: Teams stretches across chat, meetings, phone and rooms in a single client, and several capabilities buyers assume are included, such as intelligent recap, watermarking and advanced calling, sit behind the Teams Premium and Teams Phone add-ons.
Bottom line: If Microsoft 365 is already your system of record, Teams is the rational default and the burden of proof falls on Slack to earn a second bill; if it is not, buy Slack outright, because standalone Teams Essentials leaves out the Office integration that makes Teams worth choosing at all.
Read the full reviews: Slack · Microsoft Teams.