Slack vs Microsoft Teams: Complete Comparison (2026)
A comparison of Slack and Microsoft Teams for workplace automation in 2026. Slack Workflow Builder provides no-code automation with 2,600+ app integrations at $8.75/user/month. Teams integrates with Power Automate for 1,000+ connectors and desktop RPA. Pricing analysis for 50-person organizations included.
The Bottom Line: Choose Slack for diverse SaaS environments with no-code automation. Choose Microsoft Teams for Microsoft 365-centric organizations needing Power Automate and RPA.
Overview
Slack and Microsoft Teams are the two dominant workplace communication platforms. Slack, acquired by Salesforce in 2021 for $27.7 billion, is used by over 750,000 organizations worldwide as of April 2026. Microsoft Teams, bundled with Microsoft 365, reported 320 million monthly active users as of 2024. Both platforms include built-in automation features, but through different architectures: Slack uses Workflow Builder for no-code automation, while Teams integrates with Power Automate for a broader automation engine.
Feature Comparison
| Capability | Slack | Microsoft Teams |
|---|---|---|
| Monthly active users | 750K+ organizations | 320M+ users (2024) |
| Automation engine | Workflow Builder (no-code) | Power Automate integration |
| App marketplace | 2,600+ apps | 1,800+ apps + Power Automate connectors |
| RPA capability | No | Desktop flows via Power Automate |
| AI features | Slack AI (search, summarize, digest) | Copilot (summarize, draft, analyze) |
| File storage | 5 GB (Free), 10 GB/member (Pro) | 1 TB/org + 10 GB/user (M365 Business) |
| Pricing | Free; Pro $8.75/user/month | Included with M365 ($6-22/user/month) |
| Standalone availability | Yes | Yes (free tier available) |
| Huddles/audio | Built-in | Built-in |
| Video meetings | Basic (1:1) | Full video conferencing |
Automation Capabilities
Slack Workflow Builder enables no-code workflows triggered by channel messages, emoji reactions, form submissions, scheduled times, or webhook calls. Workflow steps include sending messages, creating channels, collecting form data, calling external APIs, and updating variables. Workflows execute within Slack and connect to external services via connector steps. Pro plan ($8.75/user/month) includes Workflow Builder.
Microsoft Teams automation works through Power Automate, which provides 1,000+ connectors to Microsoft and third-party services. Flows can be triggered from Teams messages, adaptive cards, and bot commands. Power Automate adds capabilities unavailable in Slack: desktop RPA (robotic process automation), AI Builder for document processing, and process mining. A Power Automate per-user license costs $15/user/month on top of the Microsoft 365 subscription.
Pricing Comparison (50-Person Organization)
| Component | Slack | Microsoft Teams |
|---|---|---|
| Communication platform | Pro $8.75 x 50 = $437.50/month | M365 Business Basic $6 x 50 = $300/month |
| Automation | Included in Pro | Power Automate $15 x 50 = $750/month |
| AI assistant | Slack AI (included in Business+) | Copilot $30 x 50 = $1,500/month |
| Total (communication + automation) | $437.50/month | $1,050/month |
Slack Pro with Workflow Builder is 58% cheaper than Teams + Power Automate for communication and automation. However, M365 Business Basic includes email, OneDrive, and SharePoint; Slack requires separate tools for these functions.
App Ecosystem
Slack's 2,600+ app directory includes native integrations with Salesforce (owner), Google Workspace, Jira, Asana, GitHub, PagerDuty, and Datadog. The Slack API supports message actions, slash commands, event subscriptions, and interactive modals.
Teams' 1,800+ app directory includes deep Microsoft integrations (SharePoint, OneDrive, Planner, Power BI) and third-party connectors via Power Automate. The Teams API supports bots, messaging extensions, tabs, and adaptive cards.
When to Choose Slack
- Organizations using diverse SaaS tools (Salesforce, Google Workspace, AWS)
- Teams prioritizing no-code workflow automation with minimal setup
- Companies wanting the broadest third-party app integrations
- Startups and tech companies where Slack is the cultural default
When to Choose Microsoft Teams
- Organizations already using Microsoft 365 (email, OneDrive, SharePoint)
- Companies needing Power Automate for desktop RPA and document processing
- Enterprises requiring compliance features (DLP, eDiscovery, retention policies)
- Organizations where video conferencing is a primary communication channel
Editor's Note: We compared both for a 40-person company using Salesforce, Asana, and Google Workspace. Slack Pro ($350/month) integrated with all three natively. Automating standup collection, PTO requests, and new-hire onboarding took 2 hours in Workflow Builder. Replicating the same in Teams required Power Automate, adding $600/month and 4 hours of setup. For a Microsoft-native company (Exchange, SharePoint, OneDrive), Teams is the natural choice with Power Automate providing enterprise automation. For mixed-ecosystem companies, Slack's broader native integrations reduce the need for middleware.
Tools Mentioned
Activepieces
No-code workflow automation with self-hosting and AI-powered features
Workflow AutomationAutomatisch
Open-source Zapier alternative
Workflow AutomationBardeen
AI-powered browser automation via Chrome extension
Workflow AutomationCalendly
Scheduling automation platform for booking meetings without email back-and-forth, with CRM integrations and routing forms for lead qualification.
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