The choice between Slack and Microsoft Teams isn’t about which platform has more features—it’s about which one fits the ecosystem you’ve already built and what it’ll cost you if you need to change your mind later. Both platforms handle team chat, file sharing, and video calls. The difference shows up in compliance requirements, how smoothly they integrate with your existing tools, and what happens when you try to leave.
Quick verdict:
- Slack is the best choice for small creative teams, startups outside the Microsoft ecosystem, and organizations that need flexible third-party integrations without custom middleware
- Microsoft Teams is the best choice for enterprises already using Office 365, regulated industries requiring mature compliance frameworks, and organizations consolidating chat and telephony into one system
- Your compliance requirements and existing tool stack matter more than feature lists—Teams has deeper regulatory certification coverage; Slack has broader third-party app compatibility
At a glance
| Feature | Slack | Microsoft Teams | Winner for Remote Work |
|---|---|---|---|
| Price (as of August 2026) | $12.50/user/month (Pro) | $6/user/month (Business Basic) | Teams (lower entry point) |
| Free tier option | No | Teams Essentials ($30/month, up to 100 users) | Teams |
| Message search | Full history on paid plans | Full history on all plans | Tie |
| Third-party integrations | Extensive app marketplace | Smaller app marketplace, deep Microsoft ecosystem | Slack (breadth); Teams (Microsoft depth) |
| Video/calling features | Huddles (quick sync audio/video) | Full PSTN, Live Events, Outlook integration | Teams (production calling) |
| Mobile experience | Fast, feature-parity with desktop | Functional but heavier | Slack |
| File storage | Per-workspace limits | 1TB per user (SharePoint) | Teams |
| Compliance certifications | SOC 2, ISO 27001 | SOC 2, ISO 27001, HIPAA, FedRAMP, PCI-DSS | Teams (regulated industries) |
| Best for | Small teams, non-Microsoft ecosystems, mobile-first | Enterprises, Office 365 users, regulated industries | Depends on your stack |
| Biggest weakness | Limited compliance depth; no free tier | Clunky mobile; team-scoped architecture hides cross-team info | Context-dependent |
Slack — best for small creative teams and mixed-vendor toolchains
Slack organized team communication around channels before that became the standard. Its flat channel structure works beautifully when teams are small enough that everyone can follow the key announcement channels without asking permission. The app ecosystem is extensive, and the mobile experience is the smoothest in the category—fast, full-featured, and reliable on inconsistent connections.
The pricing is straightforward: $12.50 per user per month for Pro (the tier most small teams need), or $15 per user per month for Business+ if you need compliance features like SOC 2 Type II attestation. There’s no free tier. For a 30-person team, you’re looking at $375 per month minimum.
What Slack gets right is flexible integration. If your team uses Asana for project management, Google Workspace for documents, and Salesforce for CRM, Slack’s integrations connect without custom middleware. Teams using mixed-vendor stacks report faster setup compared to platforms that assume a single-vendor ecosystem.
Strengths:
- Best-in-class mobile experience—fast, full-featured, works smoothly on spotty connections
- Deep integration ecosystem with non-Microsoft tools (Google Workspace, Asana, Salesforce)
- Flat channel structure makes cross-functional discovery easier in small organizations
- Polished UI that reduces friction for non-technical users
- Workflow Builder enables automation without custom development
Weaknesses:
- No free tier makes it expensive to trial for small non-profit teams
- Calling features (Huddles) work for quick sync-ups but aren’t production-ready for replacing dedicated conferencing platforms
- Per-seat pricing gets expensive as teams scale
- Limited offline functionality—traveling or working in low-connectivity areas is frustrating
- Narrower compliance certification coverage compared to Teams
Best for: Startups and small companies (under 50 people) outside the Microsoft ecosystem, creative and tech-first teams that value integrations with non-Microsoft tools, and remote-first cultures where polished mobile experience and async communication (threads, voice clips) matter more than enterprise telephony features.
Microsoft Teams — best for enterprises and organizations requiring regulatory compliance
Teams is Microsoft’s answer to Slack, built directly into the Office 365 ecosystem. If your organization already uses Outlook, SharePoint, OneDrive, and Excel, Teams adds minimal friction—files live in SharePoint automatically, calendar invites sync with Outlook, and compliance features (data loss prevention, eDiscovery, retention policies) are mature and enterprise-ready.
The pricing advantage is clear: $6 per user per month for Business Basic (which includes Teams, 1TB of OneDrive storage, and web versions of Office apps), or $10 per user per month for Business Standard (which adds desktop Office). There’s also Teams Essentials at $30 per month for up to 100 users, suitable for small teams just starting with team chat.
Where Teams pulls ahead is in calling, meetings, and regulatory compliance. The video conferencing is production-ready, not an afterthought. The PSTN integration means you can use it as your actual phone system, which matters for customer support teams or distributed sales organizations. For regulated industries, Teams offers compliance certifications that Slack doesn’t match: HIPAA for healthcare, FedRAMP for government contractors, and PCI-DSS for payment processing environments.
Compliance certifications: the real difference for regulated industries
Both platforms offer SOC 2 Type II attestation and ISO 27001 certification for information security management. But Teams extends compliance coverage significantly further.
If you’re in healthcare and need HIPAA compliance, Teams provides Business Associate Agreements and technical safeguards for protected health information; Slack’s trust documentation notes SOC 2 and ISO 27001 but doesn’t claim HIPAA readiness. If you’re a government contractor requiring FedRAMP authorization, Teams has it; Slack doesn’t. If you process credit card data and need PCI-DSS compliance, Teams documentation covers it; Slack’s compliance focus is narrower.
This isn’t just paperwork. Organizations in regulated industries report that using a platform without the right certifications means custom workarounds—separate systems for certain conversations, manual auditing processes, limited functionality to avoid compliance violations. The compliance gap has real operational costs.
For organizations outside regulated industries, this doesn’t matter much. But if you’re in finance, healthcare, legal, or government contracting, Teams’ deeper compliance coverage saves significant setup time and reduces audit risk.
The true cost of switching platforms
Per-seat pricing comparisons miss the real cost: what happens when you need to switch. Moving from Slack to Teams (or vice versa) includes expenses that don’t show up on pricing pages:
Data migration and portability loss: Neither platform makes it easy to export and import message history cleanly. Your searchable institutional knowledge—years of technical discussions, decision logs, project retrospectives—doesn’t migrate intact. Teams that have switched report effectively losing access to old context, forcing people to recreate documentation or accept that certain decisions are no longer traceable.
Integration rebuild costs: Custom bots, Workflow Builder automations in Slack, or Power Automate flows in Teams don’t port between platforms. Switching means rebuilding these workflows from scratch. Organizations report spending weeks to months rebuilding automations they’d built up over years.
Retraining and productivity loss: Teams and Slack organize information differently. Slack’s flat channel architecture versus Teams’ team-first structure means people need to relearn how to find information. Expect a productivity dip during the transition—people will struggle to locate conversations, miss notifications they would have seen in the old system, and make mistakes while learning new workflows.
Business disruption during cutover: You can’t just flip a switch. Most organizations run both platforms in parallel for weeks or months, which means duplicate notifications, context-switching overhead, and confusion about where to post what. Some teams handle this better than others, but expect friction.
The switching cost matters because it makes your initial platform choice sticky. Pick the platform that fits your ecosystem now and the ecosystem you expect to have in three years. If you’re a Google Workspace shop considering Microsoft 365, factor in not just per-seat pricing but whether you’re willing to commit to Teams for the long term.
Integration ecosystems: quantity versus quality
Slack has an extensive app marketplace. Teams’ app marketplace is smaller but includes deep Microsoft ecosystem integrations. That difference matters less than whether the integrations you actually need are well-maintained and reliable.
The challenge with large app marketplaces is quality variation. Many apps are abandoned or minimally maintained. Organizations evaluating Slack integrations report that a significant share of available apps haven’t been updated in years, have broken functionality, or lack responsive support when something goes wrong. The marketplace size looks impressive, but the number of production-ready, actively maintained integrations is smaller than the headline count suggests.
Teams has the opposite problem: if you’re using tools outside the Microsoft ecosystem, integrations often require custom development or third-party middleware. Teams buyers using Google Workspace, Salesforce, or Atlassian products discover that “works with Teams” often means “works via Zapier” or “requires a custom connector.” The official integrations are high-quality, but the coverage is narrower.
Bottom line: If you’re all-in on Microsoft, Teams’ integrations are deep and reliable. If you’re using a mixed-vendor stack (Google Workspace, Asana, Salesforce, Slack-native tools), Slack’s ecosystem—despite the quality variation—still offers broader coverage and faster setup.
Side-by-side: Slack vs Teams pricing for real-world scenarios
Let’s model what these actually cost for typical business scenarios:
Trying team chat (10 people, 3 months): Slack Pro costs $375 for three months. Teams Essentials costs $90 total for three months (up to 100 users). If you’re testing team chat on a tight budget, Teams wins significantly.
Small growing team (30 people, permanent): Slack Pro runs $1,125/month. Teams Business Basic costs $180/month. Even upgrading to Teams Business Standard ($300/month), Slack costs substantially more.
Mid-market (100 people, compliance features): Slack Business+ is $1,500/month. Teams Business Standard is $1,000/month. The gap narrows, but Teams remains cheaper and includes Office apps.
Enterprise (500+ people): Both platforms offer custom pricing at this scale. Teams typically costs less because Microsoft uses volume licensing as a competitive weapon, but the exact savings depend on your existing Microsoft agreement.
For small teams and startups, the pricing difference is material. For enterprises, total cost of ownership matters more than per-seat pricing—Teams saves money if you’re already paying for Office 365, but Slack might save setup time if you’re not.
Teams’ architectural choice: team-scoped versus flat channels
Teams organizes everything by teams first, then channels within those teams. That’s great for preventing sprawl in large organizations, but it also means cross-functional announcements get buried unless someone manually shares them across teams. Organizations migrating from Slack to Teams consistently report that knowledge discovery becomes harder—people miss updates from departments they don’t belong to. Slack’s flat channel structure made those announcements visible by default; Teams requires deliberate sharing and permission management.
For small organizations (under 50 people), Slack’s flat structure is simpler. For large enterprises (500+ people), Teams’ team-scoped architecture prevents chaos but requires more admin overhead to keep cross-functional communication flowing.
How we compared these
We evaluated both platforms based on publicly available pricing (verified August 7, 2026), official feature documentation from Slack’s trust center and Microsoft’s Teams security documentation, compliance frameworks from NIST and the AICPA’s Trust Service Criteria, and user-reported experiences from teams that have deployed or migrated between these platforms. We analyzed integration breadth, calling capabilities, compliance coverage, and switching costs based on reported migration experiences.
We didn’t conduct formal usability testing or comprehensive enterprise feature audits—those require enterprise contracts and regulated-industry context beyond our scope. For advanced features like eDiscovery, custom data retention policies, or industry-specific compliance requirements, consult your IT and compliance teams directly.
Best for: final recommendations
Choose Slack if:
- Your team is under 50 people and you value polished mobile experience and ease of use
- You’re using Google Workspace, Asana, Salesforce, or a mixed-vendor toolkit (not all-Microsoft)
- You prioritize flexible integrations without custom middleware development
- Your team is remote-first and async communication (threads, voice clips) matters more than enterprise telephony
- You’re outside regulated industries that require HIPAA, FedRAMP, or PCI-DSS compliance
- You’re willing to pay a premium for better UX and faster setup with non-Microsoft tools
Choose Microsoft Teams if:
- You’re already using Office 365 (Outlook, SharePoint, OneDrive)—the integration savings are substantial
- You need production-ready video calling and PSTN phone system replacement
- You’re in a regulated industry (healthcare, finance, government contracting) requiring HIPAA, FedRAMP, or PCI-DSS certifications
- Your team is 100+ people and per-seat cost differences matter at scale
- You collaborate frequently with external vendors or clients (guest access is simpler in Teams)
- You’re planning to stay in the Microsoft ecosystem long-term (switching costs are high)
Don’t choose either if: You’re looking for a free solution for a small team or non-profit. In that case, consider alternatives like Discord (free, but less business-focused) or Mattermost (open-source, self-hosted). We’ll cover those in slack alternatives small teams.
What this means for your remote team
The decision comes down to ecosystem fit and compliance requirements more than features. If you’re already paying for Office 365, Teams is cheaper, better integrated, and offers deeper regulatory compliance coverage. If you’re using Google Workspace or a mixed toolkit, Slack’s integrations and mobile experience justify the premium—but only if you don’t need the compliance certifications that Teams provides.
Plan for switching costs. Your bots, workflows, and message history won’t migrate cleanly between platforms. Pick the one that fits the ecosystem you expect to use in five years, not just today. For organizations in regulated industries, compliance coverage isn’t negotiable—Teams’ HIPAA, FedRAMP, and PCI-DSS certifications save significant operational overhead compared to trying to force Slack into those frameworks.
For deeper context on how Teams compares as a calling solution, see zoom vs teams calling. If you’re evaluating whether the broader Office 365 suite is right for your remote team, start with microsoft 365 for remote work.
Affiliate disclosure: This article contains affiliate links. If you purchase a subscription through our links, we may earn a commission at no additional cost to you. These commissions help us maintain Comparisony, but they don’t influence our recommendations—we’d recommend these products regardless of affiliate programs.