Slack vs. WhatsApp (2021)

Slack vs WhatsApp
Slack vs. WhatsApp

Many applications have been launched in recent years, aiming to improve communications between people. Two of them are WhatsApp and Slack. Both are popular to text, video call, share images, documents, etc., but, despite the facts, certain features make them different applications. So, how do both work? This article covers Slack vs. WhatsApp.

What are both?

Slack is a tool for a business to communicate and centralise teamwork, while WhatsApp is the centralised messaging and voice-over IP service platform. The table compares some of the features of both.

Slack connect
Organise conversations
Integrate apps
Note to self
Voice and video calls
Screen share
Fast messaging
Group chats
Voice and video calls
Record audio
Share images and videos
End-to-End encryption
Slack vs. WhatsApp Features

WhatsApp does not charge any fee or subscription, while Slack is a subscription-based tool that offers limited features in the free plan.


Slack can run on:

  • Android 6.0 and above
  • iOS 12.2 or above
  • macOS 10.11 or above
  • Windows 8 or above

Apart from them, it also supports significant web browsers. On the contrary, WhatsApp supports:

  • Android 4.1 or above
  • iOS 10 or above
  • KaiOS 2.5.1 or above
  • Windows
  • macOS

Like Slack, WhatsApp can be used on web browsers.

Related: Slack vs. Rocket.Chat (2021)

How do both work?


What is Slack

Slack is an all in one communication tool which offers channels and private messaging. Channels are task-based, where people can chat about a specific task. You can also direct messages to anyone in the organisation.

On the top, you find a section called Threads. Here you find all the conversations related to you. For example, if someone mentions you, you will find that mention in the usual chat, but that whole comment will also be in Threads. Let’s see some tools that slack offers:

  • Rich text editing
  • Mentioning people (@mention)
  • Scheduling messages
  • Reminders (self and to other people)
  • Note to self
  • Status
  • View analytics
  • Customise emojis
  • Check activity
  • Do not disturb


How to use WhatsApp

WhatsApp, on the other hand, is a simple messaging app. It offers to send direct messages to contacts, while groups can be created to communicate. Some of the tools that WhatsApp offers are:

  • Message to any person in contacts
  • Block people
  • Location sharing
  • Voice messages

Signing up

Signing up on Slack is straightforward. You type your business email to begin. Once verified, you can add details about the company, projects or invite team members while signing up, but those can also be done later.

To Sign-up on WhatsApp, you need your phone number because WhatsApp verifies your phone number, unlike Slack. Once the phone number is verified, you can add your photo and name on the next screen.

Related: Google Workspace vs. Slack

Supported file attachments

WhatsApp web file attachments
WhatsApp file attachments

Slack supports all documents, including PDFs, word documents, docs, audio, screenshots, etc. The files can be uploaded via the computer or through file-sharing apps such as Google Drive, Box, Dropbox, etc.

The WhatsApp mobile app supports sharing images, videos, contacts, and locations, but to share files and documents, one must go to the file location and share it using WhatsApp. WhatsApp has a limit of 100MB per file.


Integrations on Slack

Integrations are a part of Slack vs. WhatsApp comparison. Slack offers integration called Slack apps to help you work faster. You can connect the program with over 2400 applications.

You can integrate only ten apps in the free version, but these restrictions get removed in the Pro and Business+ plan. Some of the apps are;

  • Microsoft Teams
  • Google Calendar
  • Google Drive
  • Trello
  • Zoom

WhatsApp, on the other hand, does not offer any integrations.

Related: Google Keep vs. Trello

Voice and video calls

Slack gives one-to-one video and voice calling options in its free version. However, you can add up to 15 people with a screen sharing option in its paid plans. You can video call through the in-built feature of slack or can integrate any third-party application.

WhatsApp, on the other hand, offers one-to-one video and voice calling options. You can add a maximum of 8 participants to it. The capacity has been increased from 4 to 8 in its latest version.


Slack Pricing and Plans
Slack Pricing and Plans

As mentioned earlier, WhatsApp is free of cost, whereas Slack has two paid plans: Pro and Business+. The pro features cost $6.67 per month on the monthly plan, which consists of:

  • Unlimited messaging history
  • Unlimited apps integrations
  • 10 GB storage per member
  • Group calls up to 15 people with screen sharing options
  • Priority support

The Business plan costs $12.50 per month per user. In addition to all the Pro features, it includes:

  • 20 GB storage per user
  • Single sign-on
  • Data exports of all messages
  • 99.99% guaranteed uptime

The program also offers an upper hand plan called Enterprise Grid for large organisations. One must contact sales to find out more about that plan.

Which one should you use?

Slack is a tool mainly for businesses. Let’s say you work in a corporation; this tool is highly useful in such situations. You can organise tasks, chat, share documents, have a group call, and share the computer’s screen.

On the other hand, WhatsApp has day-to-day use. It helps you connect to the world individually. Your friends, relatives, club members etc., are the ones to contact on WhatsApp.

Slack vs. WhatsApp: Links

The bottom line

Before selecting any, make sure to understand your goals and your work life. Making the right decision is critical because you need something that can last for a long time. Anyway, here we end this article; Slack vs. WhatsApp. What are your thoughts on this article or the apps? Share your opinions in the comments section.

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