Unified Communications

Slack vs Microsoft Teams vs Webex

Discover the key features and considerations for choosing between popular team communication tools like Slack, Microsoft Teams, and Webex, and learn how Mio can seamlessly integrate these platforms to enhance collaboration in your workplace.
Slack vs Microsoft Teams vs Webex

The most popular team communication tools are Slack, Microsoft Teams, and Webex. 

You can see those stats by clicking the Workplace Messaging Report below.

Workplace Messaging Report

When you are searching for collaboration and communication applications, you will come across these three time and time again. 

Each solution brings different functionality and features to the table so making a selection is often challenging. 

You’ll often be thinking...

  • What should I know about these applications?
  • Which features are truly enterprise-grade? 
  • How can I choose between them?

Often, IT Managers and CIOs are required to have all the information about platforms available before making a decision about which to choose.

That’s why this post breaks down the main considerations for choosing between Slack, Microsoft Teams, and Webex. We then discuss what to do if you still can’t pick between each one.

If you already know enough about these platforms, you can SKIP AHEAD to the Slack vs Microsoft Teams vs Webex section.

SPOILER ALERT: You don’t have to pick just one platform!

1 - What is Slack?

At its core, Slack is considered an IM app, but one with a host of additional plugins. 

It has been created with the purpose of bringing together in one place all the moving parts of a businesses communication. 

The variety of features it has available doesn’t disappoint and that’s why so many companies are using it as their primary collaboration tool.


This online-chat space has gained recognition in the business world thanks to its range of functionality that tackle communication barriers within an enterprise.

You can keep all communication styles together in one app, Slack replacing instant messaging, text messaging, and email

“Effective communication is critical for teamwork success. Being able to maintain collaborations productively can be challenging within a large company, especially if employees have different schedules or work in different departments. Advanced messaging tools can bring impressive improvements here.”

Andrew Baxley, Team Manager at Studicus writing service.

Slack Features

The main features of Slack are:

  • Sharing files
  • Group chat or direct messaging
  • Access 100+ integrations
  • Using the open API to build your own integration
  • Access to securely encrypted transfer data
  • Mobile and desktop messaging
  • Advanced search functionality
  • Two-way audio and video
  • User profile personalization capabilities
  • Slack Huddles for drop-in audio

You can choose Slack for free, or the Standard or Plus Slack plan, depending on your needs and to what extent you want the application’s functionalities to go.

If you are part of a larger organization, you can also opt for Slack Enterprise Grid, designed to foster communication in larger departments and companies.

Here are the most important differences between each Slack plan:

Slack Free

  • Messaging
  • Calls
  • Search
  • Storage
  • Perfect for early startups and very small teams

Slack Standard

  • Pricing: 6.67 USD per person per month (when billed yearly)
  • Includes unlimited apps
  • Group calls and screen sharing
  • Allows guest accounts
  • 10GB of storage for each user

Slack Plus

  • Pricing: 12.5 USD per person per month (when billed yearly)
  • 99.99% guaranteed uptime
  • Allows export of all messages
  • Single sign-on (SSO)

Slack Enterprise Grid

  • Price to be discussed with the sales team, depending on your needs
  • Unlimited workspaces
  • Prevention of data loss
  • HIPAA-compliant collaboration
  • Perfect for large corporations in highly regulated industries

Slack Channels

You can use the tool for one-on-one, private or group communication, as well as fire sharing. 

A group conversation takes the shape of a multi-party direct message or as a Channel.

Within a channel, members have access to all the content, history, and files previously shared in this persistent chat environment.

Slack channels

You can easily create a new channel, join or leave the group conversation, the overall communication experience being similar to social-media. 

Channels can be made private so only defined users have access to each channel. 

Channels can also be created across different companies, creating a collaborative working environment for teams in different businesses.

A good example here is when contractors are assigned to work with a specific business for an extended period of time - or when a supplier/buyer relationship needs an open and continuous method of communication.

Slack Search Functionality

Search functionality can make an enterprise’s operations faster and more effective, so an app that focuses on this specific feature will always be a great choice. 

Slack updated its search module recently, and the feature is now reported as more intuitive, intelligent, and useful. 

Just by typing out a key phrase or keyword, you get results from the repository of data, conversations, and files.

Slack search functionality

Slack Integrations

Many third-party service integrations, like Google Drive, Trello, Asana or Zendesk, are available in Slack.

Integration is easy and it permits you to add the elements that will make team collaboration more effective. 

Speed of support, robust notifications, easy file uploading and archiving are just a few other examples of what Slack has to offer.


2 - What is Microsoft Teams?

Microsoft Teams, commonly adopted as simply “Teams” is an equally popular communication and collaboration solution.

In fact, Microsoft has recently confirmed it has 145m daily active users.

Teams is often implemented by enterprises with multiple teams across many locations, and has some powerful features available, targeting on-going in-house communication efficiency. 

Microsoft Teams

Microsoft Teams Features

This app’s main functionality starts with a team (unsurprisingly!)

You can create a group and invite the team members you want to collaborate with. 

For collaborations with freelancers or people from different departments, you can invite guest users as well - for temporary communication.

Within a team, you can collaborate on common tasks, communicate via messaging, calls and video calls and share files.

A Microsoft Teams team

Microsoft Teams Channels

Just like Slack’s channels, these are conversations with different members of your team. 

You have the option to create a channel for a project, a department or a topic, depending on the specifics of your business’ needs. 

Through a channel, you can hold audio and video meetings, send files, collaborate on documents in real-time, or simply chat. 

Microsoft describes the differences between Teams and Channels here.

Microsoft Teams Tabs

The Tabs component allows you to navigate through the entire content of your channel. 

Three tabs come incorporated by default: Files, Conversations, and Wiki. 

The Files tab is where you can find all documents and information shared by your team:

Microsoft Teams tabs

On the other hand, in the Conversations tab, you will find all your messaging history from the members of your teams:

Microsoft Teams tabs example

We've laid out the best Microsoft Teams features that we use in this post below.


Pros of using Microsoft Teams include: 

  • Up-to-date and budget-friendly
  • Secure
  • 150 connectors to Microsoft and third-party services
  • Mobile device management with Microsoft Intune
  • Easy meeting scheduling
  • Integrated with Microsoft Office 365
  • Slash command shortcuts

Besides group-file sharing and messaging between users, some businesses rely on Microsoft Teams for content creation as well, combining this collaboration app with writing tools and services, like TrustMy Paper, Grammarly, GrabMyEssay, Google Docs, or BestEssay. 

You can read an overview of the best Microsoft Teams integrations in the post below.


Enterprises usually favor Teams as an all-round communication tool thanks to its meeting and calling functionality.

Microsoft Teams comes in three different plans: Free, Office 365 Business Essentials (5 USD per user per month) and Office 365 Business Premium (12.5 USD per user per month).

History of Slack vs Microsoft Teams

If you’re unfamiliar with the entire Slack and Teams history, here’s a recap of what’s happened so far:

History of Slack vs Microsoft Teams
  • Slack launches in August 2013; originally an internal tool for Slack CEO, Stewart Butterfield’s, company at the time, Glitch.
  • Slack gains quite a reputation with startups and developers looking for a messenger tool with a friendly user interface.
  • Microsoft Teams launches in March 2017 as the next generation of Microsoft Lync and Skype for Business.
  • Slack posts an open letter in the New York Times congratulating Microsoft on its launch, pointing out some useful tips to create a collaboration platform, and stressing how hard it is to get creation of such a tool correct.
  • Existing Office 365 and Skype for Business customers become the natural first users of Teams and ensure rapid penetration of an existing customer base.
  • Later in 2017, Slack unveils shared channels so two companies can chat via Slack.
  • In 2019, Slack made public its daily active user count of 12 million.
  • Later that year, Microsoft Teams makes public its daily active user count of 13 million.
  • In the same year, Slack announces interoperability with Microsoft Outlook and Microsoft OneDrive – allowing users to connect their Outlook calendar, send email to channels, preview entire PowerPoint and Word files all within Slack.
  • In April 2020, the Slack and Teams calling integration gets announced—allowing Teams calls to begin in Slack (without switching apps). A second move recognizing users of both platforms within businesses.
  • In June 2020, Slack Connect gets announced as a method to create shared channels with up to 20 different organizations.
  • In July 2020, Slack files an antitrust complaint against Microsoft
  • Microsoft unveils Teams Connect to provide shared channel functionality in its own app.
  • Slack keeps quiet about its daily active user count while Microsoft publishes several major milestones. The latest being 145 million as of April 2021.

3 - What is Cisco Webex?

A state-of-the-art collaboration solution, Cisco Webex has its own important role among the variety of communication tools on the market. 

It ensures efficient teamwork, regardless of where the members of your team might each be. You may be familiar with traditional Webex productivity tools but the collaboration app is fairly new to market.

Webex combines messaging, file sharing, calling, meetings, and integrations.

Cisco Webex Teams

The tool’s most important collaboration functions are: 

  • Chat – this is a must for any application of this sort. Webex permits you to stay connected to your team members constantly with a persistent chat feature, group messaging, and customizable notifications. 
  • Whiteboard – real-time writing, drawing, and document editing with digital and virtual whiteboards. 
  • Meetings – host online meetings with your team and access collaboration features, like whiteboarding or screen sharing.
  • Scheduling – organize and manage your schedule for upcoming meetings. You can integrate this function with the current calendar tools you are using. 
  • File sharing – save and send files easily. Files remain where you’ve initially saved them, making searching for a specific document easy. 
  • Calling -  you can make voice calls from within the application, the tool being fully compatible with Cisco Webex Calling and Cisco Unified Communication Manager.

These functions have been added to ensure seamless continuity from physical to virtual spaces and from one device to another.

The interface of the application maintains a simple design, keeping all capabilities easy to understand and use.

Cisco Webex Teams interface

Cisco Webex Features

Key Webex features that draw interest to Webex are:

  • End-to-end data encryption
  • Integration with state-of-the-art software like Salesforce, GoogleDrive, Dropbox, and many more
  • Access to artificial intelligence and bots 
  • Device security capabilities
  • Intelligent file searching
  • Integration with business-critical tools


Webex is available in three different packages for different businesses, having a flexible payment plan available as well.

Slack vs Microsoft Teams vs Webex

The ultimate question.

Which one is the best?

There is no right answer. 

Each tool has its specific purpose, and while some features intertwine, others remain representative of that particular application and offer a better fit for different business types.

Historically, engineers have favored Slack, teams with Cisco VoIP devices used Webex, and Office 365 always have Teams included in their package.

Making a comparison is necessary to understand how one app is different from the other, and why each might be indispensable to your business.

What to look for when comparing Slack vs Microsoft Teams vs Webex


Freemium versions are available for all three applications. 

Upgrading is advised if you want to have access to advanced functionalities like unlimited workspaces, more storage, screen sharing group calls, guaranteed uptime, HIPAA compliance and more. 

Webex has an easy-to-understand pricing method, which can be scalable. 

Slack and Microsoft Teams come with similar costs for upgraded versions. 


Getting started with these applications is something you probably want to look into in advance.

Onboarding should be simple and fast, influencing the productivity and efficiency of your operations. 

Setting up Microsoft Teams might require a migration from Skype for Business or the setting up of a SharePoint directory.

Slack has faster deployment in 7 or 8 steps, requiring no phone number entry or credit card registrations.

To get started with Webex, you can start the trial process for free by entering your business email and downloading the app, and continue upgrading your plan from there.

Layout and Design

In terms of design, Slack has the most customization options available. 

All three tools, however, maintain an easy-to-understand layout, focusing on capabilities rather than complex visual features. 

You have vertical panels, a search box, and the usual tabs for Chat, Channels, Files, Teams, etc.

This element is very much personal choice so make sure your teams have a say in what will work best for them.

User Invites

For Slack, you can either ask members to join the workspace, or simply invite users after you’ve created the said workspace. 

With Microsoft, the system demands you to first invite users to the Office 365 Admin Panel, found in the Office start page. 

Webex allows you to add users manually in the Cisco Webex Control Hub. Members will appear in an invite pending stage until they sign in for the first time.


Direct chat and threaded conversations are accessible on all three of these applications. 

The tools each support group chat and each has incorporated standard messaging features like deleting, editing, pinning, and @ mentioning. 

Powerful notification systems are also guaranteed regardless of application. 

Recently, all three communication platforms introduced the possibility to react to messages, as well as add additional reminders.

File Sharing

With Slack, the maximum file size you can send is 1 GB. 

With Microsoft Teams, you can go up to 15 GB.

Webex restricts files to less than 2 GB.


Each application has capabilities in terms of tool integration. 

Slack probably has the winning position, with the highest number of integrations.

However, you need to make sure the integrations available are the ones your business uses.

Mio has highlighted the best integrations per platform in these posts:

Slack Integrations ; Teams Integrations ; Webex Integrations

Managing Multiple Communications Tools

Ultimately, you don’t need to choose a single tool.

You will have different personalities in your business.

Each person will have different experiences from other businesses they have worked in and from software they use in their personal lives.

Personal preference will always trump dictatorship in business collaboration.

Ignoring this almost always leads to workplace silos, where one department uses one tool and the other uses something else.

If that doesn’t happen, and in most cases, as well this happening, we see shadow IT rife across businesses.

Shadow IT is what happens when individuals introduce their own choice of software, hardware, or alternative to the business norm and it takes over as the office go-to tool.


Now that you know a bit more about each one of these collaboration tools, you still might be tempted to choose a single option.

And that’s fine. 

Each tool has its own standout area.

You probably already know which is your personal favorite right now.

However, that same thinking applies to each member of your business. At a higher level, it definitely applies to each department thinking one tool will be better suited for their niche needs.

Before you commit to a single platform, you must consider interoperability. 

Using multiple chats simultaneously is possible, as long as you access the right solution. 

Slack users can stay in Slack.

Teams users can stay in Teams.

Mio is the behind the scenes tool that syncs everything together.

When you implement your team collaboration platform, start with Mio from day one.

With Mio in the background, you can let users leverage the benefits of the platform of their choosing while remaining able to chat with their colleagues on another platform.

Mio has a full synchronization feature which works in the background of your existing messaging platforms, and provides seamless chat interoperability across channels, DMs, and even group DMs.

If some of your employees prefer Webex, while others work better with Slack, no one has to compromise. 

Departments can collaborate without inconveniences, users can use the app of their choice, and no further training is required because no one will have to make a switch. 

Posting, sharing a file, direct messaging to a Webex user via Microsoft Teams or Slack is made possible.

The user on the other end will not experience any differences and likely won’t even realize their colleague is using a different chat app.

Key Features of Mio

  • Synchronization of spaces and channels across all chat applications
  • Find and message users across multiple tools
  • Synchronization of all chat application features, like message editing, mentions, file uploads or video calling
  • Safe and secure integration
  • One company, a single conversion

Final Thoughts

Maintain collaboration in your enterprise by accessing the functionalities of the most popular messaging application on the market. 

Let your team members decide which tool to use, and cover the functionalities of Microsoft Teams, Webex, and Slack easily with the help of Mio

Click here to keep your teams in sync.

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