Jump to ↓

Our Verdict: Microsoft Teams is an ideal choice for remote/in-house teams needing a complete collaboration app with video calling, file sharing and live co-editing, whiteboards, and the option to add a business phone system. Slack is a great option for smaller, fully remote teams looking for a free chat app with basic file-sharing capabilities and high-level integrations–especially with their existing video calling software.


High-Level Overview of Slack & Teams

Category Winner
Price+Value Teams: Offers more scalable and complete solutions, including the option to bundle voice calling via Teams Phone
Free Version Teams: Includes free 1-hour video calls for 100 participants in addition to instant messaging, screen/file sharing, and web versions of Microsoft 365 apps

Team Chat Messaging

Slack: Slack team chat offers user presence, messaging threading, and advanced capabilities like Slack Connect, audio/video clip sharing, and custom workflows
Video Conferencing  Teams: Teams has advanced native online meeting and webinar tools, whereas Slack offers only on-demand Huddles or video clip recording/sharing
Virtual Whiteboarding  Teams: Teams offers unlimited whiteboards with simultaneous live co-editing, file sharing, pre-made templates, and advanced collaboration tools
File Sharing+Storage  Teams: Teams offers live file co-authoring via Word, Excel, PowerPoint, and other Microsoft 365 apps, plus file storage/organization and in-meeting/in-chat file sharing
Third-Party Integrations+APIs Slack: Slack offers 2600+ integrations, APIs, bots, and shortcuts that make combining third-party platforms and customizing workflows simple
Customer Support+Network Reliability Draw: Both providers have limited information about support channels and available support hours, and neither offers the coveted 99.999% uptime
Security+Host Controls Slack: Slack Connect enables secure guest access, has robust compliance certifications, and provides Enterprise Key Management


Choose Slack If:

  • You want to replace internal emails with real-time instant messaging capabilities that offer custom push notifications across devices, eliminating communication silos and cutting down on missed information
  • You use several third-party platforms (file sharing apps, video calling tools, CRM systems, marketing software, etc.) and want to streamline them within a single collaborative workspace
  • You’re a small or new business with mostly remote team members and are looking for a feature-rich and intuitive free chat app
Learn more about Slack



Choose Microsoft Teams If:

  • You use other apps in the Microsoft 365 ecosystem (PowerPoint, Excel, Word, OneDrive, etc.) and need compatible team chat messaging and video conferencing capabilities
  • You need a free online meeting platform with native features like screen sharing, in-meeting chat, and file sharing/collaboration to increase employee engagement
  • You plan to add business phone system functionality in the future
Learn more about Teams



What Is Slack?

Slack is a cloud-based instant messaging and productivity platform that streamlines business communications by replacing endless emails with real-time team chat.

slack interface

Slack users can create or join public/private channels (messaging workspaces) where they can update their user presence, share files, reply and react to other messages, and elevate chats into one-click voice or video calls in Slack Huddles.

Slack integrates with popular third-party team collaboration and communication tools, lets teams create automated workflows and shortcuts, and enables direct and group chat messaging across desktop and mobile devices.


What Is Microsoft Teams?

Microsoft Teams (Teams) is a voice/video calling, instant messaging, and team collaboration tool available as a standalone application or as a part of the Microsoft 365 Suite (which includes PowerPoint, Excel, Outlook, Word, OneDrive, etc.)

teams interface

Designed to eliminate the need for most third-party applications, Teams is best known for its web conferencing capabilities, which include breakout rooms, live captions in 30+ languages, screen sharing, virtual whiteboards, and basic webinar functionality.

The default Skype for Business replacement, Teams users can bundle the Essentials Plane with Microsoft Teams Phone, a cloud-based business phone system. Note that Teams is accessible on both Mac and Windows devices.


Slack vs. Microsoft Teams Pricing and Plans

Summary: Both Teams and Slack offer a Free Plan, but the Teams Free version comes out on top by including hour-long video meetings for 100 users in addition to unlimited chat messaging, Together Mode, and screen sharing. Teams also offers scalable bundles of Teams Essentials and Teams Phone, while Slack doesn’t offer a native business phone system. However, the Slack Free Plan allows for 10 third-party integrations, while the Teams Free Plan only offers web versions of some Microsoft 365 (formerly Microsoft Office) tools.


Microsoft Teams Pricing

Users can get Microsoft Teams as a standalone application or as a part of the Microsoft 365 Suite. It offers a free plan and a free 1-month trial of its 4 paid plans, which range from $4-$22/user/month when paid annually.

  • Microsoft Teams Free Plan: Includes 30-hour 1:1 meetings and 60-minute 100-participant meetings, unlimited chat messaging for 100 users, screen sharing, Together Mode, on-demand/scheduled meetings, live meeting closed captions, noise suppression and custom backgrounds,  5GB total file storage and file sharing up to 2GB/user, Word/PowerPoint/Excel Web Versions, Outlook contact importing
  • Microsoft Teams Essentials Plan ($4/user/month): Adds 24/7 web/phone support, 30-hour meetings for 300 participants, 300 chat users and guest access, Microsoft Whiteboard, breakout rooms, 10GB file storage, 250+ app integrations, meeting recording/transcription, SSO
  • Microsoft 365 Business Basic Plan ($6/user/month): Adds 99.9% uptime guarantee, Microsoft 365 app access, live meeting captions in 30+ languages, 1TB storage, advanced reporting, multi-factor authentication, collaborative annotations, Microsoft Bookings
  • Microsoft 365 Business Standard Plan ($12.50/user/month): Adds Versions of Word/PowerPoint/Excel/Outlook/Publisher/Access,  webinar hosting with registration, reporting, and email confirmation
  • Microsoft 365 Business Premium Plan ($22/user/month): Adds cyber threat protection, access control, and additional security features

Teams Phone Bundles

In addition to standalone Teams pricing, users can save 33% by bundling Teams Essentials with Teams Phone. Bundled pricing is available in 4 tiers from $8-$32/user/month when paid annually, and varies according to available calling features and call type.

All Teams Phone bundled plans include VoIP features like call queues, auto attendants, hold music, simultaneous ring, call forwarding, Caller ID, call transfer, call park, voicemail, call flip, presence-based call routing, and call blocking.

  • Microsoft Teams Essentials+Phone Plan ($8/user/month): Unlimited inbound calling, requires a calling plan for outbound calls
  • Pay-As-You-Go Essentials+Phone Plan ($10/user/month, For Country Zone 1 US): Unlimited inbound calling, metered outbound calling
  • Domestic Calling Essentials+Phone Plan ($16/user/month): Unlimited inbound calling, outbound domestic calling minutes are included in the monthly plan
  • International Calling Essentials+Phone Plan ($32/user/month): Unlimited inbound calling, outbound international calling minutes included in the monthly plan


Slack Pricing

Slack offers one free plan and 3 paid plans from $7.25-$12.50+/person/month when billed annually (monthly pricing is also available.) A 90-day free trial is available, making it an ideal choice for startups and SMBs on a tight budget.

  • Free Plan: Slack’s Free Plan includes 1 workspace, direct/group chat messaging with public/private channels and a 90-day retention period with searchable message history, file sharing, audio/video clips, 1:1 Slack Huddles, external direct messages, integrations for up to 10 tools, canvases for channels/DMs, custom #general channel permissions, E2EE, 2FA, standard customer support, access to the Slack app for mobile devices
  • Pro Plan ($7.25/person/month): Adds group Slack Huddles and group messaging with external users, Custom User Groups, unlimited canvas access with 30-day version history, custom sidebar, access to unlimited integrations with 2600+ apps, custom functions, automated Standard Workflow Builder for unlimited published workflows, 1,000 Premium Workflow runs/month, custom retention period, OAuth with Google, 24/7 customer support
  • Business+ Plan ($12.50/person/month): Adds 99.99% SLA uptime, unlimited channel posting permissions, 2,000 Premium Workflow runs/month, SSO, message data exporting and SCIM user provisioning, four-hour first response time for customer support
  • Enterprise Grid Plan (Quote-based pricing): Adds unlimited Workspaces, HIPAA Compliance, 5,000 Premium Workflow runs/month, Enterprise Mobility Management (EMM) Integration, Enterprise Key Management add-on, Custom Terms of Service, domain claiming, offline backup and Data Loss Prevention



Slack vs. Teams: Feature Comparison

Below is our Slack vs. Teams head-to-head comparison of the top features.


Team Chat Messaging

Summary: Slack is a team chat application above all else, so it easily surpasses Teams thanks to Workflow automation, shortcuts and slash commands, guest access control, and high-level in-chat integrations. However, Teams has some strong messaging features, including pre-made chat templates and loop components.


Shared Features

Both Slack and Teams offer:

  • Persistent, always-on chat messaging on desktop/mobile devices
  • 1:1 and group chat messaging with public/private channel creation
  • Chat pinning, chat bookmarks, chat search bar
  • Direct replies/message threading
  • Custom/premade live user presence/status updates
  • Formatting options (Bold, Italic, adjust font size/color, add lists/numbered lists, etc.)
  • User tagging, @mentions, favorite contacts
  • File sharing/storage in-chat
  • Custom message notifications
  • Emoji reactions, GIFs, etc.


Slack is known for its intuitive user interface and ease of use–but it also offers some lesser-known advanced features that optimize workflows, enable guest access, and allow for in-chat collaboration.

slack workflow

Top Slack chat features are:

  • Slack Connect: Grant external users controlled, permission-based access to only specific channels and conversations, not entire workspaces
  • Workflows: Custom and template-based business 1 or 2-step process automation for daily tasks like helpdesk requests, time off management, recurring reminders, forms, etc.
  • Audio/Video Clips: Users can record and upload video and audio-only clips to Slack messages from their desktop and iOS and Android mobile devices
  • Shortcuts: Advanced keyboard shortcuts for message formatting, editing, replying, and searching, use slash commands to locate integrated apps and initiate actions, add Slackbots


Teams chat messaging enables real-time team communication and comes pre-loaded with standard chat features. However, its interface is overcrowded by message previews that make it hard to keep track of conversations.

teams chat messaging

Additional Teams chat features include:  

  • Loop Components: In-chat formatting options let users insert a table, task list, paragraph, checklist, or agenda with real-time co-editing
  • One-Click Calling: Because Teams offers native voice calling and video conferencing capabilities, users can instantly upgrade from a chat to a voice/video call with one click
  • Team Templates: Choose from pre-made templates for event management, project management, employee onboarding, incident response, or industry-specific templates for banks, hospitals, etc.


Video Conferencing

Summary: Video conferencing capabilities are vastly different in Slack vs Teams, as Slack lacks a full-fledged web conferencing feature and encourages users to integrate third-party platforms or meet via a quick Huddle. Microsoft Teams offers on-demand and scheduled meetings for up 300 participants to meet for 30 hours. Teams includes in-meeting features like chat, screen sharing, meeting recording/transcription, breakout rooms, Together Mode, and more. Businesses needing a true, feature-rich video meeting tool should choose Teams over Slack.



In Slack, users can access video calling via:

  • Third-party integration with a preferred video conferencing app
  • The on-demand Huddle feature
  • Recording/sharing a video or audio clip

slack huddle

A Slack Huddle is an audio-first, real-time voice and video collaboration tool, but not a true video conferencing feature since it only allows for on-demand, unscheduled meetings. Huddles are always-on virtual meeting spaces for quick check-ins of no more than 5 minutes–not for hosting full-fledged team meetings.

Within a Huddle, Slack users can:

  • Set Huddle topics and enable/disable video streaming
  • Chat, react with emojis, send/share attachments, make presentations
  • Enable screen sharing



Microsoft Teams includes ad hoc and scheduled video meetings of up to 30 hours for a maximum of 300 participants.

Top Teams Meeting features are:

  • Together Mode: Creates a virtual shared meeting space via AI mapping with automated cropping and custom backgrounds
  • Speaker Coach: Personalized insight into total talk time, pace, repetitiveness, filler words, monologue, intonation, inclusiveness, etc.
  • Teams Premium: Includes AI Meeting Recap with automatically generated notes, highlights, suggested tasks, speaker markers/meeting chapters, custom meeting templates and themes, Virtual Appointments with email and SMS confirmations, appointment management, and forms integration for pre-appointment data collection
  • Webinar Capabilities: Webinar registration, branded themes, presenter bios, advanced reports, polling, presentations, etc.

teams video call

Additional Teams in-meeting features include: 

  • Screen sharing, presentation mode, whiteboarding, collaborative note-taking
  • Live chat, virtual hand-raising, emoji reactions
  • Audio-only meetings
  • AI-powered closed captioning/translations in 30+ languages
  • Custom avatars, backgrounds, and filters
  • View/download participant list


Virtual Whiteboarding

Summary: Teams gives users access to Microsoft Whiteboard, a much more traditional whiteboard tool than Slack’s Canvas. Slack’s Canvas tool is best for taking meeting notes, making quick to-do lists, and storing project-specific files–not real-time collaboration. Microsoft Whiteboard includes pre-made templates, custom drawing/text tools, and simultaneous collaboration for all meeting participants inside and outside of Teams Meetings.



Instead of a traditional whiteboard, Slack offers the native Canvas feature on all free and paid plans.

The Canvas feature is a completely blank slate designed to serve as a single source of truth for more long-form project management and team collaboration.

slack canvas

Users can create a Canvas in a channel or from scratch outside of a specific conversation (anyone can also make their own Canvas to store personal notes/reminders.) They’re especially useful when used as note-taking tools in a Huddle, during a brainstorming session, or when creating project to-do lists.

Canvas creators can add anyone to a Canvas, enable live co-editing, mention/tag other users, and use additional tools like:

  • Drag-and-drop files, link previews, and images onto a Canvas
  • Add comments and emoji reactions to Canvas content
  • Access Canvases on desktop and mobile devices
  • Checklist and task management formats



Teams offers unlimited access to Microsoft Whiteboard in and outside of video meetings. Users can enable simultaneous whiteboard collaboration and co-editing, choose from one of 40 pre-made whiteboard templates, and share whiteboards with other users.

microsoft teams whiteboard

Additional Microsoft Whiteboard features include: 

  • Unlimited simultaneous co-editing with collaborative cursors, “last modified by” data, and version control
  • Add images, files, sticky notes, grids,
  • Draw, highlight, stamp, add text, line, laser pointer, and shape tools
  • Undo/redo buttons


File Sharing+Storage

Summary: Teams provides in-meeting and in-chat file sharing, live co-editing in compatible Microsoft 365 apps, and advanced file organization and storage. Slack doesn't offer native co-editing but integrates with third-party cloud storage apps.



Slack users can share files (up to 1GB each) to specific channels, and access stored files in the Files tab. However, Slack does not offer native simultaneous file co-editing capabilities on its platform. Instead, users can create conversation “threads” directly under files with comments, suggested edits, and other relevant discussions.

slack file sharing

In Slack, users can share files by: 

  • Using drag-and-drop to attach desktop files/share file links directly in chat messages
  • Integrating third-party file management tools like Google Drive, OneDrive, OneNote, SharePoint, box, Adobe Creative Cloud, and more to upload/share files in the Slack interface

Users can access shared files by clicking the Files tab in their sidebar, filter files, or locate files via the Slack message search bar. Slack automatically syncs files between devices, but only allows members of the channel where the file was shared to view/edit that file. Files are stored in accordance with your custom or 90-day message retention policy.

Additional Slack file sharing/storage features are:

  • Add file/image description
  • Share up to 10 files per message
  • Image/file previews
  • Download/delete files
  • Mention users when sharing files
  • Create conversation threads under files
  • Add Slash commands (shortcuts) for file searches



Teams offers robust file sharing, storage, and co-authoring capabilities with the native Microsoft 365 file management tools Word, PowerPoint, and Excel.

teams co-author

Users can share files directly from Microsoft 365 apps like OneDrive, drag-and-drop files from a desktop to the Teams chat interface, and copy-paste file links. Files are stored in the Files tab, and can be organized into folders or found using the search bar.

Best of all, Teams users can co-edit files in real-time, add comments/notes, make direct or suggested edits, tag other users, and more directly in Word, PowerPoint, Excel, Visio, and other Microsoft 365 tools–no need for app switching.

Teams users can also share files and set file permissions for external guests.


Third-Party Integrations+APIs

Summary: Slack easily outperforms Microsoft Teams in terms of both ease and availability of third-party integrations, bots, and APIs. Slack has never billed itself as an “all-in-one” UCaaS and collaboration tool, and is designed to alongside 2,600 of your preferred business software applications, not replace them. Teams offers only about 250 third-party integrations and actively encourages the exclusive use of tools within the Microsoft 365 suite.



Slack integrates with over 2,600 third-party applications and even allows Free Plan users to integrate up to 10 tools (unlimited integrations are available for all paid Slack users.)

Users can type in shortcuts or add bots to immediately access third-party integrations directly in the Slack chat interface. Slack APIs allow for both custom applications and custom workflow designs.

slack google integrations

Slack integrates with third-party apps like:

  • Office 365, Google Workspace, Zoom, Webex
  • Asana, HubSpot, Calendly, Trello, Mailchimp, Monday.com
  • Miro, Dropbox, box
  • Salesforce, Zoho CRM, Pipedrive



Microsoft Teams is designed to be used as a part of the Microsoft 365 suite of business software, so its third-party integrations aren’t as robust as Slack’s.

However, Teams does provide seamless integrations with Microsoft tools like Word, PowerPoint, OneDrive, Excel, etc., combining key apps into an easy-to-use, streamlined interface.

teams excel

Teams and Microsoft 365 APIs are available, as are integrations with popular platforms like: 

  • Zoom, Webex, Slack, Wrike
  • Salesforce, Freshdesk, Zendesk, Zoho Desk
  • Dialpad, ServiceNow, RingCentral


Customer Support+Network Reliability

Summary: Slack provides limited information about available support channels and network reliability, but does include a 99.99% SLA uptime on top-tier plans. Teams offers only a 99.9% uptime for top plans, but phone and web support is included on all plans. Slack and Teams both have lackluster onboarding and ongoing customer service, and neither offers paid priority customer support.



Unfortunately, Slack provides little transparency into its support process–especially for free users who are promised only vague “Standard Support.”

Slack does offer all users access to an online user knowledge base with video tutorials, email support, online form submissions, and limited support via an online chatbot. Pro Plan users and above gain access to 24/7 support, but there is no information about which support channels are offered. Business+ and Enterprise Grid users are upgraded to a four-hour first response time.

Slack offers a 99.99% guaranteed SLA on Business+ and Enterprise Grid Plans only.



Teams offers much more robust customer service and support options than Slack, including live chat messaging, phone support, online training and tutorials, user forums, and an online portal in all plans.

However, little information about operating hours and availability by plan is available.

Teams offers a 99.9% uptime for Microsoft 365 Business Basic and Standard users–surprisingly low for such an established company.


Security+Host Controls

Summary: Though Teams offers advanced host controls for video meetings, Slack offers better overall security features and compliance certifications including Enterprise Key Management, Data Loss Prevention, eDiscovery, and SCIM guest provisioning. To access more advanced security features, Teams users must purchase Microsoft Defender.


Shared Features

Slack and Teams both offer:

  • End-to-end encryption
  • HIPAA Compliance
  • Custom Retention Policies
  • SSO and two-factor authentication
  • Audit Logs



Additional Teams security features include:

  • Sensitivity Labels: Apply to confidential/sensitive video meetings to automate advanced security settings
  • Meeting Lobby: Meeting waiting room with custom access settings
  • In-Meeting Hosts Controls: Define meeting roles, add co-hosts,  enable/disable automatic recordings, meeting chat, presenter permissions and video feed, mute/unmute, announce when participants join/leave meeting, manage attendee/presenter views, announce when people leave/join, enable anonymous poll responses
  • Green Room: Hosts and presenters can join a meeting before participants are allowed in, ideal for practicing/last-minute coordination
  • File Control: Enable/disable copying and forwarding in meetings, watermark shared content



Slack provides a much more transparent look into its security policies than Teams. It offers FedRAMP,  SOC 3, FINRA, CSA, ISO/IEC 27701, 27018, 27017, and 27001 certifications.

Slack also offers risk-management features like global retention policies and customized Terms of Service that let owners and admins set clear rules for Slack workspace and channel access. Additional Slack security features include custom data residency policies, GDPR compliance, and Enterprise Key Management.

Slack Connect provides more secure guest access to your Slack Workspaces, verifying businesses and partner organizations, and advanced message access and permission control.


User Experience

Below, we’ll explore the pros and cons of Slack and Microsoft Teams.


Slack Pros and Cons

Slack Pros

  • Intuitive, easy-to-use interface with customizable notifications on desktop and mobile windows via the mobile app
  • Superior third-party integrations and bots let teams access their favorite business apps directly in Slack channels and conversations
  • Slack Connect feature enables secure collaboration with external users, allowing team members to invite up to 250 guest users to join specific channels only. Team members can set custom permissions for Slack Connect guests, revoke invitations/remove members, and view member profiles

Slack Cons

    • Doesn’t include native video conferencing features, and the Huddle tool cannot successfully replicate the true online meeting experience. This requires Slack users to integrate a third-party web conferencing tool like Zoom, Teams, or GoTo Meeting
    • Lacks essential native team collaboration features like file storage, virtual whiteboards, calendars, task management tools, and file co-annotation, meaning it may not be right for large organizations
    • Limited customer support information, live chat support is not really live/reroutes support questions to email, no available information on whether or not Slack offers live phone or support at all (there is no toll-free support phone number for Slack)


Microsoft Teams Pros and Cons

Teams Pros

  • Full-featured Free Plan with 100-participant 60-minute video calling, team chat, screen and file sharing, live closed captioning, and more
  • Seamless integration with Microsoft 365 apps means access to a complete desktop/web-based collaboration suite with file sharing and co-editing, cloud storage, spreadsheet and slide presentation tools, etc.
  • Available Phone+Teams bundles provide cost-effective cloud communications and collaboration tools on one platform

Teams Cons

  • Limited third-party integrations compared to competitors, users pressured to switch over to Microsoft 365 software
  • The over-crowded chat interface is less intuitive and can lead to overlooked messages without well-configured notification settings
  • The lack of simultaneous screen sharing is a glaring omission in a feature-rich video calling tool


Alternatives to Slack and Teams

The web conferencing and UCaaS providers outlined below are some of the best alternatives to Microsoft Teams and Slack.

Provider Pricing+Plans Top Features Best For
RingCentral 1 free video meeting plan, 1 paid Video Pro+ Plan, 3 RingEX plans from $20-$35/user/month AI Meeting Insights, Collaborative Notes, 24-hour meetings for up to 200 meeting participants (large meeting add-on available) Blended SMBs needing a complete and scalable unified communications tool offering team chat, voice calling, video meetings, SMS, and virtual faxing
GoTo Meeting 3 paid plans from $12-$16+/user/month 24/7 support on all plans, Smart Assistant, Slide to PDF, Unlimited meeting lengths for up to 250 participants Small businesses needing a basic video calling tool mostly for presentations and brainstorming sessions, or teams using additional GoTo tools
Webex 1 free plan, 3 paid plans from $14.50-$25+/user/month Live polling/Q&A by Slido, Webex Assistant with in-meeting voice commands, 24-hour meetings for up to 1,000 participants Teams needing a robust free video calling tool with unlimited whiteboard and local meeting recording, SMBs planning to scale up to a complete business phone system in the future
Zoom 1 free plan, 4 paid plans from $15.99-$25+/user/month 30-hour meetings for up to 1000 participants, Zoom Phone integration, AI Assistant Remote teams needing access to a combined business phone system and web conferencing tool with advanced in-meeting collaboration and engagement tools
Google Meet 1 free plan, 4 paid plans from $6-$18+/user/month Digital whiteboarding, 24-hour meetings for up to 1000 participants Current Gmail or other Google app users that want to add video calling to their communications stack, any team looking for a free and user-friendly video calling app