Enterprise features, pricing, security, and integrations comparison. Which collaboration platform is best for your organization?
EPC Group — founded in 1997, headquartered in Houston, a Microsoft Solutions Partner holding all six solutions designations — publishes this guide..
Microsoft Teams vs Slack Enterprise is a frequent enterprise comparison question. EPC Group helps Fortune 500 organizations evaluate platforms, score against compliance and total cost of ownership requirements, and select the right Microsoft-ecosystem fit. Microsoft enterprise consulting experience since 1997.
By Errin O'Connor, Founder & Chief AI Architect, EPC Group
Microsoft Teams and Slack are the top enterprise collaboration platforms. They have over 320 million and 40 million daily active users, respectively. Selecting the right platform is crucial. It can greatly impact your organization's productivity, security, and total cost of ownership.
This comparison draws on EPC Group's enterprise since 1997 Microsoft Teams consulting experience and hundreds of collaboration platform deployments. We evaluate both platforms across the criteria that matter most to enterprise decision-makers: features, security, compliance, pricing, and integration depth.
Whether you are evaluating platforms for a new deployment, considering a migration from Slack to Teams, or consolidating your collaboration tools as part of a broader Microsoft 365 strategy, this guide provides the data-driven analysis you need.
A detailed breakdown of core capabilities across both platforms as of 2026.
| Feature | Microsoft Teams | Slack |
|---|---|---|
| Channels & Messaging | Unlimited channels, threaded replies, rich text, loop components | Unlimited channels (paid), threaded replies, rich text, Canvases |
| Video Conferencing | Up to 1,000 participants, breakout rooms, Together Mode, recording | Huddles up to 50 participants, screen sharing |
| Webinars & Live Events | Up to 10,000 view-only attendees, Town Halls | Not available natively |
| Phone System (PSTN) | Teams Phone with calling plans, auto attendant, call queues | Not available |
| File Storage | Backed by SharePoint & OneDrive (1 TB/user) | 10 GB (free), 10 GB/user (Pro), 20 GB/user (Business+) |
| Real-time Co-authoring | Native with Word, Excel, PowerPoint inside Teams | Via third-party integrations (Google Docs, etc.) |
| App Marketplace | 1,400+ apps, custom apps via Teams Toolkit | 2,600+ apps, Bolt SDK for custom apps |
| Workflow Automation | Power Automate integration, built-in workflow templates | Workflow Builder (basic), Zapier integrations |
| AI Copilot | Microsoft Copilot: meeting summaries, chat recaps, task extraction | Slack AI: search, summaries, channel digests |
| Guest Access | Azure AD B2B guest access with granular controls | Slack Connect for cross-org channels |
| Mobile Apps | iOS, Android, desktop (Windows, Mac, Linux), web | iOS, Android, desktop (Windows, Mac, Linux), web |
| Message Retention | Custom retention policies via Microsoft Purview | 90 days (free), custom (paid plans) |
| Search | Full-text search across messages, files, people | Full-text search (90-day limit on free) |
For regulated industries (healthcare, finance, government), compliance capabilities are non-negotiable.
Total cost of ownership includes licensing, storage, and bundled capabilities.
Included with Microsoft 365 plans
Up to 100 participants, 5 GB storage, unlimited chat
300 participants, 10 GB storage, phone/web support
300 participants, 1 TB storage, web Office apps, SharePoint, OneDrive
Desktop Office apps, webinar hosting, Copilot-ready
Full compliance suite, eDiscovery, DLP, Information Barriers
Teams Phone, audio conferencing, advanced analytics, Copilot add-on eligible
Standalone collaboration pricing
90-day message history, 1:1 Huddles, 10 app integrations
Full message history, group Huddles, unlimited integrations
SAML SSO, data exports, 99.99% SLA, 20 GB storage/user
Unlimited workspaces, EKM, HIPAA-eligible, data residency
Note: Slack does not include document editing, file storage, or phone systems. These require separate subscriptions (e.g., Google Workspace, Zoom Phone), increasing total cost of ownership.
Where Teams provides clear enterprise value over Slack.
Seamless access to Word, Excel, PowerPoint, SharePoint, OneDrive, and Power BI directly within the Teams interface. Co-author documents in real time without switching apps.
Replace your legacy PBX with Teams Phone. Includes auto attendant, call queues, voicemail transcription, and direct routing for PSTN calling. Slack has no native telephony.
400+ compliance certifications including HIPAA, FedRAMP, and SOC 2. Built-in DLP, eDiscovery, retention policies, and Communication Compliance for regulated industries.
Meetings for up to 1,000 participants, Town Halls for 10,000, breakout rooms, Together Mode, live captions in 30+ languages, and AI-powered Copilot meeting summaries.
Build custom apps with Power Apps, automate workflows with Power Automate, and embed Power BI dashboards directly in Teams channels. No-code/low-code development for business users.
Teams is included in all Microsoft 365 plans. Organizations already paying for Microsoft 365 get Teams at zero additional cost, with 1 TB storage per user and full Office app access.
Where Slack provides differentiated value.
2,600+ integrations in the Slack App Directory, including strong support for non-Microsoft tools like Jira, Asana, Trello, GitHub, PagerDuty, and Salesforce.
Bolt SDK for building custom integrations in JavaScript, Python, and Java. Extensive API documentation, webhooks, and Slack Block Kit for rich interactive messages.
Cross-organization channels that allow secure collaboration with external partners, vendors, and clients directly in your Slack workspace without guest account overhead.
Works equally well with Google Workspace, AWS, Atlassian, and other non-Microsoft ecosystems. Ideal for organizations that are not Microsoft-centric.
Often praised for its intuitive interface, emoji reactions, custom status messages, and casual tone that encourages team engagement. Lower training barrier for new users.
Visual no-code workflow builder for automating routine tasks like onboarding checklists, approval requests, and standup reminders directly in Slack channels.
EPC Group has migrated organizations with 500 to 40,000+ users from Slack to Microsoft Teams. Our proven methodology minimizes disruption and ensures complete data preservation.
Audit existing Slack workspace structure, integrations, bots, and usage patterns. Map channels to Teams structure and identify integration replacements.
Export and migrate channels, message history, files, and user data using Microsoft-approved migration tools. Validate data integrity post-migration.
Replace Slack integrations with Teams equivalents. Configure Power Automate workflows, Teams apps, and custom connectors for business-critical processes.
Role-based training programs, quick-start guides, Teams champion network, and Viva Learning integration. EPC Group provides 90-day post-migration support.
For enterprise organizations, Microsoft Teams is often the better choice. It offers a range of features that enhance collaboration, including:
These elements make it the most comprehensive collaboration platform available.
Slack remains the better fit for several types of organizations. These include:
The bottom line: If your organization uses Microsoft 365, adopting Teams can lower costs and simplify processes. Starting from scratch, Teams provides more enterprise value for your investment.
However, if your team depends on Atlassian, Google, and AWS, consider using Slack. It integrates more smoothly with that setup.
Expert answers to common enterprise questions about Teams and Slack.
For most enterprises already using Microsoft 365, Teams is the stronger choice because it provides unified licensing, native integration with Word, Excel, PowerPoint, and SharePoint, plus enterprise-grade compliance features (HIPAA, SOC 2, FedRAMP). Slack excels for organizations with diverse toolsets that prioritize third-party integrations and a developer-friendly API ecosystem.
Microsoft Teams offers a Free tier, Teams Essentials at $4/user/month, and Business Basic at $6/user/month (which includes the full Microsoft 365 web apps). Slack pricing starts with a Free tier, Pro at $8.75/user/month, and Business+ at $12.50/user/month. For organizations already paying for Microsoft 365, Teams is included at no additional cost, making it significantly more cost-effective.
Yes. Microsoft Teams can replace Slack for messaging, channels, video conferencing, file sharing, and third-party integrations. Teams also adds capabilities Slack does not offer natively, including Teams Phone (PSTN calling), native SharePoint document management, Viva employee experience modules, and deep Power Platform integration for workflow automation.
Migration from Slack to Teams involves exporting Slack workspace data (channels, messages, files), mapping Slack channels to Teams channels, migrating user accounts, and re-configuring integrations. EPC Group provides end-to-end Slack-to-Teams migration services including data migration, user training, change management, and post-migration support for organizations of 500 to 50,000+ users.
Microsoft Teams has a significant advantage in enterprise security and compliance. Teams supports over 400 compliance certifications including HIPAA, FedRAMP, SOC 1/2/3, GDPR, and ISO 27001. It includes built-in Data Loss Prevention (DLP), eDiscovery, Information Barriers, Advanced Threat Protection, and Conditional Access via Azure AD. Slack offers Enterprise Key Management and SOC 2/3 compliance but has a narrower compliance portfolio.
Slack offers 2,600+ third-party app integrations in its App Directory and is known for its developer-friendly API and Bolt SDK for building custom integrations. Microsoft Teams offers 1,400+ apps in its marketplace plus native integration with the entire Microsoft 365 ecosystem (SharePoint, OneDrive, Power BI, Power Automate, Dynamics 365). For Microsoft-centric environments, Teams integrations are deeper; for multi-vendor environments, Slack may have broader third-party coverage.
Microsoft Teams is significantly stronger for video conferencing. Teams supports meetings with up to 1,000 participants (10,000 for view-only webinars), Together Mode, breakout rooms, live captions, meeting recording with auto-transcription, and Copilot AI meeting summaries. Slack Huddles support up to 50 participants with basic audio/video and screen sharing but lack the enterprise meeting features Teams provides.
Migration timelines depend on organization size and complexity. For a mid-size company (500-2,000 users), a typical migration takes 4-8 weeks including planning, data migration, integration reconfiguration, user training, and parallel running. Enterprise migrations (5,000-50,000+ users) may take 3-6 months. EPC Group has completed Slack-to-Teams migrations for organizations with up to 40,000 users.
Schedule a free consultation with EPC Group's collaboration platform experts. We help enterprises evaluate, deploy, and migrate Teams and Slack environments.
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Microsoft Teams and Slack are the top enterprise collaboration platforms.
Teams excels in:
Slack is better for:
This guide compares security, pricing, calling, and integrations. It includes EPC Group's expert advice on which platform is best for your organization.
| Dimension | Microsoft Teams | Slack |
|---|---|---|
| Ownership | Microsoft (Microsoft 365 ecosystem) | Salesforce (since 2021) |
| Messaging | Channels, chats, threaded replies | Channels, direct messages, Huddles |
| Video & calling | Full phone system (Teams Phone); meetings up to 1,000 | Slack Huddles (audio/video); no native phone system |
| Microsoft 365 integration | Native — Word, Excel, SharePoint, Power BI | Via connector; not native |
| Compliance certifications | 400+ (HIPAA, SOC 2, FedRAMP, CMMC) | HIPAA, SOC 2; fewer government certs |
| Pricing model | Bundled with Microsoft 365 ($6–$57/user/mo) | Standalone: Free, Pro ($7.25), Business+ ($12.50), Enterprise Grid (custom) |
| AI features | Microsoft Copilot — meeting recap, transcription, action items | Slack AI — channel summaries, search, thread recap |
| Power Platform integration | Native — Power Automate, Power Apps, Power BI | Via Workato or Zapier |
| Best fit | Microsoft 365 environments; regulated industries | Dev-heavy orgs; Google Workspace or AWS ecosystems |
Teams' biggest pricing advantage: it comes with Microsoft 365 licenses most enterprises already pay for.
For M365 shops, Teams is essentially free. Adding Slack on top creates duplicate licensing cost.
Teams is the right choice for most enterprises. It is especially strong when:
Slack fits a specific profile. Choose Slack when:
EPC Group runs Slack-to-Teams migrations for enterprises consolidating collaboration tools.
For most enterprises using Microsoft 365, Teams is the better option. It offers:
On the other hand, Slack is more suitable for development-focused organizations that use non-Microsoft stacks.
Yes — Microsoft published a Teams app for Slack and vice versa. However, the integration is limited. Organizations running both platforms typically consolidate on one. EPC Group manages that consolidation.
For M365 customers, Teams is included at no extra cost. The incremental cost is $0. In contrast, Slack Business+ costs $12.50 per user per month.
For 1,000 users, this amounts to:
No. Teams holds 400+ compliance certifications including FedRAMP, CMMC, and DoD IL4 — Slack does not. For regulated industries (healthcare, financial services, government), Teams has a materially deeper compliance posture.
EPC Group evaluates Teams vs Slack for Fortune 500 enterprise clients. Call (888) 381-9725 or request a 30-minute discovery call.
The Teams vs Slack debate usually focuses on chat ergonomics, but Microsoft Teams inherits the wider Microsoft 365 platform fabric that Slack cannot replicate inside a Microsoft tenant: Microsoft Entra ID for conditional access and guest governance, Microsoft Defender XDR for chat and link protection, Microsoft Purview for DLP, eDiscovery, and Communication Compliance, Microsoft Sentinel for SIEM correlation, Microsoft Loop for portable collaborative components, Microsoft Viva for the employee-experience layer, Microsoft Stream for hosted video, and Microsoft Syntex for AI-driven document processing.
Related enterprise references from the EPC Group knowledge base:
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