Let’s settle this properly
If you’re reading this, you’re probably deciding between Slack and Teams for your team. So let’s skip the corporate nonsense and give it to you straight.
Slack is the tool people actually want to use. Teams is the tool your IT department wants you to use.
That sounds flippant, but it’s the most honest summary we can give after running both simultaneously for 6 months. We had half our team on Slack and half on Teams during a client project that required two separate workspaces. It was an accidental experiment that taught us more than any feature comparison ever could.
Our accidental experiment
Here’s what happened. In late 2025, we took on a client whose entire operation runs on Microsoft 365. They invited us to their Teams environment. Meanwhile, our internal team runs on Slack. For 6 months, every team member lived in both tools simultaneously — Slack for internal work, Teams for client communication.
The result was revealing. Every single person on our team said the same thing unprompted: “Can we just use Slack for everything?”
That’s not because Teams is bad. It’s because Slack is genuinely pleasant to use, and Teams is… fine. Functional. Adequate. Nobody is excited about Teams. But sometimes adequate is exactly what you need.
Slack in 2026: The good, the annoying, the expensive
We’ve been paying for Slack since 2023. Here’s what’s actually changed and what hasn’t.
The messaging experience is still unmatched. We’ve tried everything — Discord, Twist, MS Teams, even that brief period where we thought Basecamp’s chat would work. Nothing matches Slack’s channel experience. Threads work. Search works. The keyboard shortcuts are intuitive enough that our fastest team members can navigate 40+ channels without touching a mouse.
Canvas changed how we run channels. Slack Canvas — basically a persistent document attached to a channel — sounds minor. It’s not. We use it for channel-level SOPs, project briefs, and pinned resources. Our #content-pipeline channel has a Canvas with our entire editorial checklist. New team members can onboard themselves in 20 minutes instead of asking 15 questions. That’s a real time savings we can measure.
Huddles with video finally replaced Zoom for quick calls. We used to schedule 15-minute Zoom meetings for things that should have been 3-minute conversations. Now someone starts a Huddle, shares their screen, and we’re done. The video quality in the 2026 update is solid — we’ve had zero complaints from our remote team members in Singapore and the Philippines.
The integration ecosystem is absurd. 2,600+ apps. We connect Slack to Notion, ClickUp, GitHub, Linear, and about 8 other tools. When a PR gets merged, we see it in Slack. When a client task hits “In Review,” we see it in Slack. Our entire operational nervous system runs through Slack channels. No other tool has this depth. If you’re deciding between Notion and ClickUp for the project side, both integrate seamlessly with Slack. Support teams can apply the same pattern to ticket escalations; our BoldDesk vs Freshdesk comparison covers the customer-facing systems that should feed those internal channels.
But here’s what Slack doesn’t like to advertise:
It’s expensive. Like, really expensive for what it is. The Pro plan at $8.75/user/month looks reasonable until you realize you need Business+ at $15/user/month for anything beyond basic compliance features. Want SSO? That’s Business+. Want message retention beyond 90 days? That’s Business+. For a 15-person team, you’re looking at $225/month just for chat. That’s $2,700 a year. For chat.
Threads can get chaotic. If your team doesn’t have strong channel discipline, Slack turns into a wall of unthreaded messages where important decisions get buried 200 messages deep in #general. We implemented a simple rule: threads for discussions, channel for announcements. It took 3 weeks to enforce and probably saved our sanity.
Microsoft Teams in 2026: Surprisingly good, still frustrating
Here’s the thing nobody admits: Teams has gotten genuinely good. The 2026 redesign that separated chat, channels, and meetings into distinct views was overdue by about 3 years, but it finally happened. The interface is no longer a confusing mess of tabs and panels fighting for screen real estate.
Copilot is the real deal. We tested Copilot in Teams for meeting summaries and action item extraction. It works. After a 45-minute client call, Copilot generated a summary that captured 90% of the action items — including the ones discussed casually at the end when someone said “oh, and we should also…” That’s the stuff human note-takers miss. If you’re on Microsoft 365, Copilot is reason enough to use Teams for meetings.
The Microsoft ecosystem integration is unbeatable. This is Teams’ superpower and Slack’s biggest weakness. In Teams, a Word document opens inline. A PowerPoint deck edits in real-time. A Planner task links directly to the meeting where it was discussed. If your company runs on Microsoft 365 — and let’s be honest, most companies over 50 people do — this integration is worth more than any feature Slack offers.
Meetings are better in Teams. There. We said it. Background noise cancellation, live captions, breakout rooms, recording with automatic transcription — Teams has been investing in meeting features while Slack was perfecting Huddles. For formal meetings with clients, Teams wins. For quick internal syncs, Slack Huddles win.
But the frustrations are real:
Teams is slow. This hasn’t changed in years. Opening Teams on a Monday morning feels like starting a diesel engine in winter. We’ve measured it: Slack opens in under 2 seconds. Teams takes 8-12 seconds to fully load on the same machine. If you’re switching between apps all day, those seconds add up.
Chat organization feels like 2015. Teams channels still don’t thread as naturally as Slack. Conversations get fragmented. The “Posts” tab in a channel is a linear mess without the visual hierarchy that makes Slack threads scannable. Microsoft keeps promising improvements, and the 2026 update helped, but it’s still not Slack-level.
Notifications are unreliable. This is our single biggest complaint and it’s been consistent across our 6 months of use. We’ve missed client messages because Teams decided a notification wasn’t important enough to show. We’ve verified notification settings multiple times. It keeps happening. Slack notifications, by contrast, have never missed a beat.
Feature comparison: What actually matters
We’re not going to list every feature. You can find spec sheets anywhere. Here’s what actually matters when you’re using these tools daily:
| Feature | Slack | Microsoft Teams | Our honest take |
|---|---|---|---|
| Chat UX | Best in class | Good but cluttered | Slack wins by a mile |
| Video Calls | Huddles are great for quick syncs | Full meeting suite with recording | Teams for formal, Slack for casual |
| File Sharing | Fine, links to external storage | Excellent OneDrive/SharePoint integration | Teams wins if you use Microsoft 365 |
| Integrations | 2,600+ apps, gold standard | 1,000+ apps, strong MS ecosystem | Slack wins on breadth, Teams wins on depth with MS |
| AI Features | AI summaries, search, Canvas | Copilot for meetings and docs | Copilot is more practically useful |
| Search | Excellent, fast | Improved, still slower | Slack search is still unbeaten |
| Admin/Compliance | Good, costs extra for real features | Excellent, built into M365 admin | Teams wins for enterprise IT |
| Speed | Fast, 2s cold start | Slow, 8-12s cold start | Slack wins, and it matters more than you think |
| External Collaboration | Slack Connect is seamless | Guest access works but setup is painful | Slack wins for working with clients |
| Free Plan | 90-day message history, 10 integrations | Unlimited message history with M365 free tier | Teams wins for free, but M365 free tier is limited |
The pricing reality check
Slack’s pricing is straightforward but expensive. Teams’ pricing is confusing but often “free” if you already pay for Microsoft 365.
Here’s what a 15-person team actually pays:
Slack Pro: $8.75 × 15 = $131.25/month. You get 90-day message history, unlimited integrations, video calls, and Canvas. Want SSO, data loss prevention, or longer message retention? Business+ at $15/user/month = $225/month.
Microsoft Teams with M365 Business Basic: $6/user/month × 15 = $90/month. But you’re not just getting chat — you’re getting Exchange email, OneDrive (1TB/person), SharePoint, and web versions of Office apps. The per-feature cost is absurdly low because Microsoft is subsidizing Teams with the rest of the suite.
Microsoft Teams with M365 Business Standard: $12.50/user/month × 15 = $187.50/month. Desktop Office apps, more storage, webinar hosting. Still cheaper than Slack Business+ with 10x more features.
The honest math: if you’re already paying for email and file storage separately, Teams + M365 is almost always cheaper. If you use Google Workspace for email and just need chat, Slack is the standalone winner but you’ll pay a premium.
| Plan | Slack | Microsoft Teams (with M365) |
|---|---|---|
| Free | 90-day history, 10 app integrations, 1:1 video calls | Included in free M365 tier, unlimited chat, 5GB storage |
| Mid-tier | Pro at $8.75/user/month | Business Basic at $6/user/month (includes email + storage) |
| Business | Business+ at $15/user/month | Business Standard at $12.50/user/month |
| Enterprise | Custom, typically $25-35/user/month | M365 E3 at $36/user/month (full Office suite) |
When Slack is the right call
- Your team is under 50 people and tech-savvy. Slack’s speed and UX matter more when your team lives in chat all day.
- You work with external partners constantly. Slack Connect lets you share channels with clients and vendors as easily as internal channels. It’s the #1 reason agencies and consultancies choose Slack.
- You’re not on Microsoft 365. If you use Google Workspace, Notion, ClickUp, or any non-Microsoft stack, Slack integrates better. Period.
- Developer team. Slack’s API, webhooks, and developer tool integrations (GitHub, GitLab, Jira, Linear, PagerDuty) are years ahead of Teams.
When Teams is the right call
- Your company runs on Microsoft 365. Don’t overthink this. The integration with Outlook, SharePoint, OneDrive, and Planner is worth more than Slack’s prettier UI. Save yourself the integration headaches.
- You do a lot of formal meetings. Teams’ meeting features — recording, transcription, Copilot summaries, breakout rooms — are genuinely better than anything Slack offers.
- Enterprise compliance requirements. If you need HIPAA, FedRAMP, or serious DLP policies, Teams’ compliance stack is deeper and more battle-tested.
- You’re budget-conscious. Teams with M365 is cheaper than Slack + separate email + separate file storage. The math is brutal.
Our honest bottom line
We pay for Slack because we’re a small team that values speed, integrations, and the fact that people actually enjoy using it. Our internal communication runs on Slack and we have no plans to change that.
But if we were advising a 100-person company on Microsoft 365? We’d tell them to use Teams. Fighting against the ecosystem never works. You’ll spend months trying to bolt Slack onto a Microsoft stack, and your IT team will resent you for it. Teams is good enough. “Good enough” at scale beats “delightful” when the delightful option creates integration debt.
The real answer is: pick the one that matches your stack. Slack for Google/agnostic stacks. Teams for Microsoft stacks. Don’t let anyone tell you there’s a universal winner — there isn’t.
Both tools have free plans. Try them both for 2 weeks with your actual team. The one people open first without being told to? That’s your answer.
And if you’re still choosing your stack — which project management tool to pair with your chat app matters just as much as the chat app itself. For video calls, our Zoom vs Google Meet vs Teams breakdown covers which conferencing tool makes the most sense. And if you’re tracking how much time your team spends in meetings (spoiler: too much), Toggl vs Harvest vs Clockify will help you pick the right time tracker.
FAQ
Is Slack better than Microsoft Teams?
It depends on your stack. We genuinely prefer Slack — the chat UX is miles ahead, it loads in under 2 seconds compared to Teams’ 8-12 second cold start, and the 2,600+ app integrations make it the center of our entire workflow. But “better” is the wrong question. If your company runs on Microsoft 365, Teams is the better choice because the integration with Outlook, SharePoint, and OneDrive is worth more than a prettier chat interface. Slack wins for Google Workspace and agnostic stacks. Teams wins for Microsoft stacks. Read our full breakdown above for the specifics.
Can you use Slack and Teams together?
Yes — we literally did it for 6 months. Our team ran Slack internally and Teams for a client project, and it works fine as long as you have clear boundaries. Slack was our internal nervous system; Teams was the client-facing meeting space. The friction comes from context-switching, not from any technical incompatibility. Tools like Zapier or Make can bridge notifications between the two if you need it. Just don’t try to use both for internal communication — pick one or your team will resent you.
Why is Slack so expensive?
Because they can charge a premium for best-in-class UX. Slack Pro at $8.75/user/month seems reasonable, but the moment you need SSO, extended message retention, or data loss prevention, you’re bumped to Business+ at $15/user/month. For a 15-person team, that’s $225/month — $2,700/year — just for chat. Compare that to Teams with Microsoft 365 Business Basic at $6/user/month ($90/month for 15 people) which also includes email, file storage, and Office apps. Slack is priced as a standalone premium tool; Teams is priced as part of a bundle. If budget is a primary concern, Teams almost always wins on raw cost.
Is Microsoft Teams really free?
Sort of. Microsoft offers a free tier of Teams that includes unlimited chat messages and basic meeting functionality. But in practice, most teams end up on a paid Microsoft 365 plan because the free tier is limited — 5GB storage, no desktop Office apps, no advanced admin controls. The real value play is M365 Business Basic at $6/user/month, which bundles Teams with Exchange email, OneDrive (1TB/person), and SharePoint. It’s not free, but the per-feature cost is absurdly low because Microsoft is essentially subsidizing Teams with the rest of the suite.
Which is better for a remote team: Slack or Teams?
For remote teams, the answer hinges on what your people actually do all day. If your remote team lives in chat, collaborates with external partners, and runs a fast-paced workflow with lots of integrations, Slack is the clear winner — Huddles replaced quick Zoom calls for us, and Slack Connect makes working with clients seamless. If your remote team runs on formal meetings, needs reliable recording and transcription, and is already using Microsoft 365 for documents and email, Teams is the practical choice — especially with Copilot generating meeting summaries that capture 90% of action items. For what it’s worth, our distributed team (with members in Singapore and the Philippines) chose Slack and hasn’t looked back.
Prices verified as of March 2026. Both tools adjust pricing periodically — always check their current pricing pages.