What is Slack?

"Slack brings team communication into one place, instantly searchable, archivable and available whenever you go."

Slack is a real-time messaging, archive and conversation search tool. It is designed to make working life simpler and more productive by removing the need for internal email and inefficient file sharing methods.

Slack brings desktop and mobile messaging into one place — with seamless file sharing, conversation syncing, and notification options. It is simple and easy to use. Users can create different conversation groups with customizable privacy settings to ensure just the right people see them.

Slack is optimized as a search tool to ensure every discussion and document is archived, indexed, and available through Slack's search bar. The powerful search and archiving features will help users never lose track of the conversations they need to remember.


Slack scored 90/100 (Top 3 in Instant Messaging & Chat) in the Instant Messaging & Chat category. This is based on user satisfaction (88/100), press buzz (72/100), recent user trends (falling), and other relevant information on Slack gathered from around the web.

The score for this service has declined over the past month. What is this?

  • Slack
  • Slack
  • Slack

Slack Product Overview

  • All team communication in one place: Say goodbye to internal email thanks to Slack’s desktop and mobile messaging, file sharing and notifications functions. Stay up-to-date even on the move.

  • Integrate with services you already use: Slack integrates with dozens of other services including Dropbox, Google Drive, GitHub, Datadog, Asana, Mailchimp etc.

  • Built for search: Archive, index and find conversations, files or links in seconds with Slack’s search functions.


Languages: French, English, Spanish, Japanese, German

Slack Features

  • API
  • Batch Permissions & Access
  • Budgeting
  • Calendar Management
  • Chat
  • Contact Management
  • Contact Sharing
  • Customer Management
  • Dashboard
  • Data Export
  • Data Import
  • Data Visualization
  • Document Comparison
  • Email Integration
  • Expense Tracking
  • External Integrations
  • File Sharing
  • File Transfer
  • Forecasting
  • Google Apps Integration
  • History/Version Control
  • Inventory Tracking
  • Marketing Automation
  • Multi-User
  • Notifications
  • Project Management
  • Scheduling
  • Supplier Management
  • Third-Party Plugins/Add-Ons
  • Travel Management

Slack User Reviews

Average User Rating:
4.42/5 based on 167 user ratings.
Your Rating:
User profile picture

Relied upon daily

// Founder at If No Reply

What do you like about Slack?

Great messaging app that's integral to team chats and running our business as a whole!

What do you dislike about Slack?

I think the sign-up process for Slack is pretty clunky when doing so for the first time - but really this is just a minor gripe and I'm very happy with Slack overall.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Slack has is all!

// Operations at SEAL Awards

What do you like about Slack?

I love how easy and instant it is. It has so many integrations that make it more complete. I currently use it to communicate with those who work remotely in my team and all the features are simple to find. I can create group chats with specific people, I can also add people who will only be working with us temporarily and restrict their access so that they can only see specific information like the contact directory. One of my favorite things about slack is that it can sign in via email instead of having me type in the password all the time (it sends an email with a link that you can click on to sign in to slack). With slack, you are in control of everything: You can choose your integrations (which are numerous), limit access, add and delete people, add customized emojis, change the color of your slack window, set the time for when you can receive the desktop pop-up notifications, set statuses to know what each person is up to, instantly share documents, videos and more. Slack has is all!

What do you dislike about Slack?

There's not much I can say about what I disliked from slack. The only issue I had was with an integration: We kept getting spam notifications every time someone would add a new item in the integrated tool and Slack would notify us in our general channel about these activities which would mix in with our messages until some very important messages would get unseen. We fixed this issue by turning off the notifications so I would advise to turn off all integrated tool notifications to avoid having a similar issue as we did.

What have you been using it for and what problems did Slack solve?

I've been using Slack as a main communication tool within the company I work for. It helps connect all of the team no matter where they are and it gets our messages across without delay which in turn helps keep our company going.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

slack is a communication tool used for messaging

// Software Developer at OATI

What do you like about Slack?

It works in mobile and documents can be easily shared. other team members can be invited to communicate

What do you dislike about Slack?

slack should have voice call for communication. And sometimes it gets hang or stops although for a very less time


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
4/5
User profile picture

great app for online communication between teams

// Associate at Sapient

What do you like about Slack?

great interface and app for android support are also available which helps in communication between teams and be online always.

What do you dislike about Slack?

nothing as far as I have used this software, I find it good overall and this is the tool which I used for a team of 200+ members


Usefulness
4/5
Ease of use
3/5
Value for money
5/5
Customer service
4/5
User profile picture

Slack

// CEO at Zealmat Tech Blog

What do you like about Slack?

Slack is an interactive chat app and website that allows group of individual to easily meetup with their idea to solve issue

What do you dislike about Slack?

It is somehow hard to understand unlike Facebook. Even when you want to add up someone you need to have some support by someone who has been using it a long period

What have you been using it for and what problems did Slack solve?

I used slack for Udacity Google scholarship 2018 we were able to form a team and it was really nice I never knew that the platform (slack) had much fun.


Usefulness
5/5
Ease of use
4/5
Value for money
3/5
Customer service
2/5
User profile picture

Excellent collaboration tool

// Senior Product Owner at Infinitec Solutions GmbH

What do you like about Slack?

Easy to visualize what I need. Easy to be notified whether in mobile or PC. Very easy to digest the info and divide into the appropriate channels

What do you dislike about Slack?

Sometimes a bit slow to load. Native client on PC or Mac is a bit heavy and needs some work.

What have you been using it for and what problems did Slack solve?

Collaboration.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

SLACK ... The best collaborative and communication software.

// Asistente personal at HIDROCENTRO

What do you like about Slack?

What I like most about slack is that it mainly allows me to communicate with my colleagues and friends in an easy, fast and very effective way. With this tool it is not necessary to use the email since it is much easier to use and is much more improved; It allows me to share my content with other applications such as Twitter, Dropbox, Trello, Google Drive and many others. It is a fantastic tool for both small and large companies, we can create public and private groups, customize our notifications, do searches and access all the content that slack offers very quickly.

What do you dislike about Slack?

The only thing I can say that I do not like about the slack is that it requires a lot of RAM because with the 5 GB of its free version it is not enough to receive and store messages, which can be an obstacle to having several long conversations and that this application only keep a certain number of messages ..
And that notifications can cause distraction because they are very constant and can lose productivity at work.

What have you been using it for and what problems did Slack solve?

With slack I have improved the way of communicating, now how fast and easy. In the company we have maintained the order between several work groups and the way in which they can communicate. We have also made contact with international companies and we can also share our personal and work experiences, all from the comfort of my home or in the office with my computer. With this software we have simplified the stress with the wonderful advantage of being able to communicate remotely making meetings or online appointments.In addition to being able to share and interact with other apps such as twitter, trello, etc.


Usefulness
5/5
Ease of use
5/5
Value for money
3/5
Customer service
5/5
User profile picture

Amazing messaging platform to share updates as well as reminders

// Recruitment Evangelist at Xobin

What do you like about Slack?

1. The free tier gives a lot of flexibility
2. The reminders are amazing
3. The integrations with various services are totally awesome
4. Custom API calls to get information from various stages totally kills it

What do you dislike about Slack?

There is not much to dislike about the application. The DND mode, the mobile app and everything they have makes it so easy to love. Don't really think there is something that I can fault the application for.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
4/5
User profile picture

A very useful tool to remain connected with team

// Research Fellow at Indian Spinal Injuries Centre

What do you like about Slack?

The best thing about slack is that it is easy to install, works on the laptop as well as mobile and connecting with the peer is very easy

What do you dislike about Slack?

I feel it takes some time in attaching the file. I also feel its UI could have been better

What have you been using it for and what problems did Slack solve?

I use it to collaborate and communicate with the team. It keeps me updated about the team activity and saves my time.


Usefulness
4/5
Ease of use
4/5
Value for money
4/5
Customer service
4/5
User profile picture

Why send email...with Slack you get instant answers

// Development Director at SherpaSocial

What do you like about Slack?

LOVE LOVE LOVE the power that Slack bring our multinational company. Email volumes are greatly reduced and better group communication happing now.

What do you dislike about Slack?

Not as customizable as I would like with regard to color font and sounds when I get Slack'd


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Great messaging app

// Designer Web at Amazon

What do you like about Slack?

It is the best app for constant communication between teams and people from the same team. It has messaging, calls and a mobile app. It is a big improvement from the email based and custom built databases with long delays.

What do you dislike about Slack?

I want to have more integrations with other tools, but I do think that they should develop more integrations and support them

What have you been using it for and what problems did Slack solve?

Communication and project management


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Good way to communicate with your team

// Web Developer at Teleperformance

What do you like about Slack?

IS a good way to prioritize and communicate to your team, as fast as it is, with great dashboard and good support it is what our departments needed.

What do you dislike about Slack?

The small usage space, some of our departments would need more than 10 or 20 GB of data, in order for them to use it to full extent, and not user other products

What have you been using it for and what problems did Slack solve?

Easy communication for the team.


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Awesome tool

// Software Engineer at Lucky Table

What do you like about Slack?

The menu is very well designed, allowing us to customize if we want to see every single channel, or if we just want to see starred channels. In that sense, it is really well built. The channels are able to search so you can find older things that were said before you joined the channel or something you need to refresh yourself on. Also, it has some interesting features like bots for birthday reminders, emoji's and gif images to share.

What do you dislike about Slack?

I would like to be able to manually set hours I am in the office so I appear offline when the work day is complete. Also, I have an issue with notification when you have two monitors. The notification box doesn't appear.

What have you been using it for and what problems did Slack solve?

Slack is used by my organization as an interoffice communication channel for both non-project related and some project-based communications.


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Prepare to revamp all your communications

// Cofounder / Marketing, Growth, Technology, Experience at Sensacional Chile

What do you like about Slack?

Slack will completely change the way your company operates. If you used email, then prepare to change all about the way you used to operate.
Slack's main feature is how easy it is to communicate anything.
You can easily create different channels for talking about different topics. You can send files, videos, use a bot to program notifications. The chat feature it's amazing and hard to perfect. You can select which type of notifications you want, you can use the app in the phone... that works awesome.

You can also connect to almost any API and use great features. Upload things via Slack, get sales notificaciones, reports, create Trello cards... almost anything you can think of.

Slack is so smart in the way it works. Usability is awesome, it's like it knows what you want.

We haven't used the video chat feature but I can guess how good that works.

For us, a small company, the cultural change was very easy. No more emails, only Slack and prefer Slack over interrupting. If it's urgent, interrupt 'in person'. Everybody loves it and, with Trello, we use it as our primary communication feature.

What do you dislike about Slack?

To be honest... not much. Of course the fact to not have more than 10,000 messages on the free version annoys, but it's obvious, you are not paying anything and getting an awesome software for free.

The mobile app it's a bit slow (at least for Android) and sending attachments isn't ideal right now, but it's a tiny detail compared to the value you get.

What have you been using it for and what problems did Slack solve?

We use it as our primary channel of communication. We send announcements, meetings, we talk one on one, use channels to coordinate... even thought we are localed physically on the same place, it's a great tool to have all the information, avoid duplication of info and getting everyone on the same page, quickly.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Amazing communication platform

// Project Manager at vrTech Trade

What do you like about Slack?

IM is just perfect; you can keep all your communication in the single tool. Creation of various communication channels is a great strength of Slack, allowing certain departments to use it for project-based communication that does not need to be sent in an email, and others to simply communicate with employees as needed.

What do you dislike about Slack?

The notifications don't work very well. I keep missing messages. Maybe if they could make a notification show up on the screen when you're tagged into a conversation, this would solve the problem. Also, I would like the ability to sync Slack with other applications we're using.

What have you been using it for and what problems did Slack solve?

Slack is used for collaboration between different team members of geographically distributed teams. We are using instant messaging, document sharing and even conference call to communicate and work on a number of projects.


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Slack keeps everyone informed

// Support at Strollers and Stilettos®

What do you like about Slack?

Modern and convenient user interface. The speed of message exchange is phenomenal. It is possible to create a huge number of chats and provide access to them to different users. I also like how easy it is to add a new user. It's also quite easy to share files, we often use this opportunity and share documents or images.

What do you dislike about Slack?

We became very dependent on Slack. Once the service was unavailable and all of the communications of our company collapsed (it was all once and no longer repeated). In the rest, it is a very convenient service that changed the whole approach to communication.

What have you been using it for and what problems did Slack solve?

We use Slack to communicate with our team. We have many offices with which we need to keep in touch. After we started using Slack, we never had any confusion about our work. All dialogs are in cloud and users always have access to them. Now all departments of our company communicate in one application, it is much more convenient than traditional e-mail.


Usefulness
4/5
Ease of use
4/5
Value for money
4/5
Customer service
5/5
User profile picture

Software for business

// Assistant Project Manager at Lucky Table

What do you like about Slack?

With this program I like that there is an opportunity to stay informed about internal conversations, subscribing to different channels. It's good that in the note the program announces my email inbox and makes the collection less about updates and more about being productive during our team. I like the general access to files or calls, which you can also make a free plan. I use a program to communicate with my clients for quick feedback and information. Thanks to this platform, my organization has become more active in marketing, and we have increased our profitability with this excellent program.

What do you dislike about Slack?

The mobile version has errors and some functional problems. Sometimes it takes time to load images or files that disappoint me.

What have you been using it for and what problems did Slack solve?

Mobile applications are great, and I especially like how creatively this program describes everything new or corrected in each update. A great example of useful, easy-to-use log updates, something many other applications can take note of. There are many free tips that this platform offers, which can really help your organization and its communications to reach the level higher.


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

Good alternative to Skype

// Managing Director at The Recruitment Geeks

What do you like about Slack?

Good alternative to skype or other chat platforms and i can see this growing over the next few years so worth becoming an early adopter. Video qualiy is good and does everything we need also was easy to setup in the first place. Good Product

What do you dislike about Slack?

Nothing to dislike really. Shame it doesnt intergrate with skype or provide maybe a more fun better access to skype. but is good


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Slack has improved our team communications

// Public Relations Specialist at Jive Communications, Inc

What do you like about Slack?

It's so easy to use! Even as a beginner on my first day, I picked it up immediately. It's also helped improve our company culture and individual team communications. I love that you can have unlimited private and public chats for all your workplace comms needs.

What do you dislike about Slack?

There is limited function if you have a free plan. Slack space can be filled quickly, especially if you have a lot of employees.

What have you been using it for and what problems did Slack solve?

It improved our team communications (better than hangouts or just sending group emails). You can video conference, send large files, code etc at the touch of a button.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Slack, Whatsapp for Business

// Council Member at SABF - South American Business Forum

What do you like about Slack?

I like that it's a really easy-to-use platform where you can separate all your conversations in channels. Also, having public and private channels really focus every subject to the specific channel you are in. It's really a must-have app when you are thinking about communication around your company.

What do you dislike about Slack?

Some of the integrations have a lot of room for improvement, that's one of the things I dislike the most. Also, sometimes mobile notifications don't work as good as they could do.

What have you been using it for and what problems did Slack solve?

We used Slack to have every conversation differentiated, so we don't lose focus in our working environment. So if you have an idea in a specific subject, you just write it in the right channel without losing the thread of another on-going conversation.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Most Productive platform for organization

// Network & Server Engineer at Rubico IT Pvt Ltd

What do you like about Slack?

Slack has so much functionality to use, it is not only about messaging program but also it is the great way to be in communicate with your organization and inform each other of deadlines. Slack is the best software which can be integrated with many programs, platforms this is great for me. I really like to use Slack and have fun with it. you can easily create private chatroom or make it public with people. Slack is really easy to use without any complications.

What do you dislike about Slack?

there is the only problem about slack is that mobile version has bugs and some functional problems, I do not really know why almost most software has mobile version problem I am always thinking about this issue so Slack has problem too I can only complain about this issue and there are no other problems for me about this software. I really like to use it and be part of it.

What have you been using it for and what problems did Slack solve?

I am working with the marketing department and we have offices in other cities as well so we need to be in touch always in anytime for reporting deadlines.also, we are using Slack to communicate with our clients for fast feedback and informing. Thanks to Slack our organization is so active in the marketing area and we increased our profitability with Slack.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Slack makes communication fun

// Freelance Tech Content Writer at freelancer, author, journalist

What do you like about Slack?

Slack is not just a messaging system, it has a lot of functionalities. There's a lot of things I like about slack:

1) Ability to create private and public channel for security purposes

2) Create channels without any limitations and allow certain people to join it

What do you dislike about Slack?

Changing the settings or preferences could be made simpler. More themes would be great for customization. Maybe a tutorial on how to adjust settings would suffice

What have you been using it for and what problems did Slack solve?

Ease of access. Being able to switch conversations with one click is super easy when you have multiple conversations going on with different people in different groups. It's also very easy to find people to start direct messages with them.


Usefulness
4/5
Ease of use
4/5
Value for money
3/5
Customer service
3/5
User profile picture

Most used app I use daily

// Executive Director at Lido Labs

What do you like about Slack?

Clean interface, great inter-office communications tool, ability to be in different workgroups

What do you dislike about Slack?

Nothing except the number of messages that can be saved in a workgroup on the free model

What have you been using it for and what problems did Slack solve?

workplace communication and personal interests


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Well designed, good apps, tons of integrations

// Head of Marketing & Customer Success at LiveAgent

What do you like about Slack?

Slack is a messaging and which delivers. It's well designed, easy to use, stable and easily expandable. There were some initiatives to switch to different products within the company, but eventually, we sticked with Slack. I like the multiple options of using it - browser, iOS app, Mac desktop app. Personally, I use the desktop app and iOS app on the go. Drag & Drop is handy, custom emojis funny and I guess the whole idea of the app is for the users to love it. It's easy to setup, we like the public and internal channels, groups direct messages etc. Great product overall.

What do you dislike about Slack?

The desktop app has been a bit buggy lately but nothing major. I continue using it on daily basis. The pricing might be a bit steep if you are a bigger company. On the other hand, the free plan gives you a lot of room and doesn't limit you "per number of seats".

What have you been using it for and what problems did Slack solve?

Communication within the company, internal messages, internal sharing of files. Slack makes it super easy to get in touch with specific people within the company or with groups of people.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Best Communication platform

// Technical Training Consultant (VMWare) at Tech Training Solutions Inc.

What do you like about Slack?

Its simple to use has all the features we have needed and the integrations are priceless, we couldn't be happier with it

What do you dislike about Slack?

We haven't found anything to complain about at this point. the product have been invaluable in foster communication through our team


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
4/5
User profile picture

Good


What do you like about Slack?

Its good way how to communicate through the company. But paid version is a bit too expensive and the fact the trial is not working as an archive is a bit shame

What do you dislike about Slack?

not archiving the links and so on. Its a bit shame but the paid version is too expensive


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
3/5
User profile picture

Slack is the best. Period.

// Associate Marketing Manager at Cordial, Inc.

What do you like about Slack?

Slack is the easiest to use. Honestly, I wouldn't even consider another chat service. It's the perfect compliment to email. It integrates with everything, has a seamless experience, great design, constantly improving, and is generally always on their game. It's perfect for team chat.

What do you dislike about Slack?

Nothing. I wouldn't change a single thing. Some might complain that it doesn't integrate well with project management tools but I disagree. In my experience, most chat services inside of a project management tool just don't do the job. Slack is the bomb.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

Slack - team communication


What do you like about Slack?

Slack is designed for keeping chats and conversations between team members. You can exchange messages and files right inside the application. You can mention other users in conversations, which are called Channels. I like many features of this system but most of all its integration with other services, delicate mail notifications only when a person is mentioned in the chat channel, ability to attach pictures and files and the mobile application.

What do you dislike about Slack?

Being hones I do not really see any disadvantages using Slack as it has everything a team could need for communication and work on the projects. It has many integrations and could be set for mostly any business need.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

It's not just app of real time messaging it saves your time and cost with collaboration

// Inside Sales Executive at Qliktag Software Inc.

What do you like about Slack?

excellent and powerful real-time messaging app with a rich collection of settings and options. It won't magically erase all the problems of email but integrate it intelligently with other software and it becomes a key part of any team's collaboration.

What do you dislike about Slack?

Free channels delete your messages after 10k.
Their search sucks, so it’s hard to find important things.
Every channel gets cluttered up with junk, making it useless.

What have you been using it for and what problems did Slack solve?

Slack spares you huge amounts of time-related with triaging messages and announcement gatherings. You are considerably more effective and your throughput shoots through the rooftop.


Usefulness
5/5
Ease of use
5/5
Value for money
4/5
Customer service
5/5
User profile picture

A good opportunity for developers


What do you like about Slack?

It's a good thing or the best opportunity for developers to communicate with other developer have a chat and even share files

What do you dislike about Slack?

Slack needs alot of authenticity and it takes long to load .slack is sometimes losses signals and colapse

What have you been using it for and what problems did Slack solve?

I have used it to share my codes and files .slack has helped me to know and chat with other developers


Usefulness
3/5
Ease of use
3/5
Value for money
4/5
Customer service
3/5
User profile picture

I don't know how I ever lived without Slack.


What do you like about Slack?

Seriously, it is the easiest to use communication platform I have ever used. The integrations are endless. Using Slack versus sending emails is a huge time saver, it is so much easier to use, and to have a conversation, rather than the back and forth with constant emails.

What do you dislike about Slack?

I haven't come across anything not to like. The only problem that I have had is how to add new users to channel, but that was easily solved with a quick trip to the help desk.

What have you been using it for and what problems did Slack solve?

We use Slack as a primary communication tool for our remote team. Having channels set with purposes makes conversations easy to have either one on one or within a group. The integrations are seemingly endless, which makes for a happy unified company.


Usefulness
5/5
Ease of use
5/5
Value for money
5/5
Customer service
5/5
User profile picture

// Sales Champ at Crozdesk

It's simple: Slack is addictive. And that is exactly what you need from an internal communication tool (well, apart from the communication bit... but Slack rocks this too).

The most difficult part of implementing new tools in a team is always getting the team to adopt it, use it, and commit to it until it sticks (or until you've figured out it's really not for you).

What makes it addictive for our team? It has the simplicity of Facebook group (or personal) chat, but with a powerful search so that you never loose important chats or brainstorms that you may need to look at later again. It's minimalistic design and the 'Slackbot' that talks to you and leads you through the setup are also part of the addiction-factor.

NOTE: regardless of which tool you want to implement, make sure you do commit to it for a week or two before judging. It takes time to change habits. As for Slack, our team has reduced e-mails by 70-80% and we've stopped communicating on 5 different platforms. Blessing.


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