Logo for Slack

Slack Coupons, Reviews, Comparisons and Alternatives

About Slack

Slack offers one-on-one messaging, private groups, persistent chat rooms, direct messaging as well as group chats organized by topic. All content inside Slack is searchable from one search box. Slack integrates with a number of third-party services, including Google Docs, Dropbox, Heroku, Crashlytics, GitHub and Zendesk.

Slack provides apps for Mac, iOS, and Android, and released an official Windows client on 18 March 2015. Slack also provides a Web version accessible from a browser. There are unofficial clients for Windows and Linux.

  • 98


    500 Critic Reviews

  • Provided by
  • Platforms
    Web based
    Mac OSX
  • Mobile
  • API
  • Pricing
    View details
    Subscription Plans
    Free Plan

  • Claim your badge

  • Claim your badge

Features & Specifications

Key Features

  • Create open channels for anyone on your team to join
  • Support for private groups and 1:1 direct messaging
  • File Sharing
  • Deep, Contextual Search
  • Always In Sync
  • Mac, Windows, Android, and iOS apps available


Supported languages
Serviceable Area
World Wide
Supported Platforms
  • Web Based
  • Mobile Web
  • Desktop Windows
  • Desktop Mac OSX
  • Mobile App IOS
  • Mobile App Android
API availability
API is available. Protocol / Formats : JSON, REST .
Access the API documentation
Slack integrates with Zendesk and more than 78 other solutions. View details
Support Options
  • FAQs
  • Knowledge Base
  • Online Support

Ratings Summary

Metric Score Rank
cloudswave Score
Domain Authority 86
Alexa Rank 207
Integration 100
Support options 68
Platforms 86
Show / Hide category leader in Radar

Slack Demo Video

Slack Screenshots

Plans & Pricing


Try it Now


  • 10,000 message searchable archive
  • 5 integrations
  • Free native apps for iOS, AndroidandMac Desktop
  • Multi-Team Support


for 1 Month / 1 user(s)


  • Fully searchable archive with unlimited messages
  • Unlimited integrations
  • Free native apps for iOS, AndroidandMac Desktop
  • Multi-Team Support
  • Simple usage statistics
  • Custom message retention policies
  • Guest access
  • Priority support
  • Google Authentication / Google Apps for Domains sign-on
  • Email forwarding to create Slack files
  • Individual user control over security policies


for 1 Month / 1 user(s)


  • Fully searchable archive with unlimited messages
  • Unlimited integrations
  • Free native apps for iOS, AndroidandMac Desktop
  • Multi-Team Support
  • Simple usage statistics
  • Custom message retention policies
  • Guest access
  • Premium support
  • Google Authentication / Google Apps for Domains sign-on
  • Compliance Exports
  • Single Sign-on with SAML 2.0 (including OneLogin, Okta and Bitium)
  • Advanced usage statistics
  • Administrative control over security policies
  • External channel support

Showing 5 out of 39 - View All

Slack Integrations

logo for Zendesk


Help Desk and Ticket Management

Slack integrates with Zendesk . Zendesk delivers the leading cloud-based customer service software. Loved by customers for its si...
Learn More

logo for Zapier


Cloud Integration

Slack integrates with Zapier. Zapier lets you easily connect the web apps you use, making it easy to automate tedious tasks. Yo...
Learn More

logo for Wrike


Project Management

Slack integrates with Wrike. Wrike provides the robust project management features you need, combined with practical collabora...
Learn More

logo for Workboard


Project Collaboration

Slack integrates with Workboard. Workboard provide real-time goal management solutions that enable leaders and teams to operate at...
Learn More

logo for Workable



Slack integrates with Workable. Workable is a recruitment software designed for small to medium-sized businesses. It replaces ema...
Learn More

View All

Critic Reviews

  • 98

    Cloudswave Score for Slack

    Rating based on 500 Critic Reviews

    458 Favorable reviews
    92 %
    42 Mixed reviews
    8 %
    0 unfavorable reviews
    0 %
  • We love this method of communicating in the office. So easy to use. It has become a valuable tool in the way we coordinate projects with one another and with how information is shared.

    Pros : Easy to use, easy to set up, based on old school IRC

    Cons : I haven't ancountered any yet.

  • Slack Use Cases and Deployment ScopeOur entire company uses Slack - every single department, and especially the people and sales reps who work remote. It completely takes away the need for email, and as a growing startup our inboxes are already cluttered as can be, so this helps to take out some of the needless emails that can take up space. We use Slack for a variety of ways, from "general" channel, to joke channels, and department channels as well. We also use it for our morning conference calls, so people are able to speak and 'interrupt' with questions and comments in the Slack channel while not disrupting the conversation on the phone.

    Pros : Ease of use. Literally everyone in the company knows how to use Slack.Customization. This might be a personal thing, but I love the customization! To add your own emojis, change the color of the sidebar, etc., it makes it personal since Slack is something I look at a lot throughout the day.Mobile access. The mobile app is great - and very useful for when I'm traveling.

    Cons : I wish that there was more detailed profile options. Since we have no social intranet, we mainly use Slack for this, and it would be great to be able to have more of a 'profile' feel than what is currently there.

  • It's not one thing that makes Slack so great. It's all the things it does, in one place, in an interface that makes it fun and easy to stay in touch. It's a team chat app that'll help you do more, together.

    Pros :

    Cons :

View All

User Reviews

  • 17 In total

  • User review from

    Jessica Pyne

    We have an international team and Slack is great for keeping in regular contact with everyone in different offices. It's great to know that we can reach them quickly, easily send files, and tag each other in conversations when we decide we need someone else's input.

    Pros :

    • Simple, clean, easy-to-use interface. How to use is really self-explanatory - I've never once Googled how to do something or looked at help documentation.
    • You can set up private channels - either one-on-one or with multiple people - or public channels that everyone has access to, with a few different stages in between.
    • There are different notifications for whether you've been e.g. tagged in a conversation, or whether a conversation is taking place in a public channel you have access to. There's a search functionality that works really well if you're trying to jump to specific conversations within a channel.
    • It's also really easy to send documents, either to a group or to an individual. You can also connect Slack to other applications - our development team has added a connector to JIRA so that they can send updates and notifications automatically between them.
    • The iPhone app also works very well - I have it always running in the background so I know I'm not going to miss an important notification if I'm away from my laptop. There's also a Do Not Disturb/Away option for if you're in an important meeting etc.

    Cons :

    • There are really only a few minor irritations in terms of negatives. Clicking on an image completely takes over the Slack window - I find this non-intuitive and always end up clicking in and out of Slack a few times to try to get back to the chatandnbsp;before I remember that I need to find the 'X' within the window itself.
    • Actually, I think that's about it. Slack doesn't provide the advanced file storage etc., but it does what it does extremely well.

    • August 2, 2016
  • User review from

    Cheryl Cross

    We use Slack for brainstorming potential marketing ideas like possible blog topics, industry trends, etc. It is a great place to share information on recent trends in the marketplace. It really helps to remove email clutter from your inbox, which can be lost in the day to day shuffle. You can easily share large video files that could be too large to send through email.

    Pros :

    • We primarily use the channels in Slack to brainstorm ideas for marketing.
    • It is also a great place to commutate out upcoming campaigns.
    • In additional the sales team has set up a channel where they share sales related information. It definitely helps to keep marketing and sales aligned.
    • You can share assets in the channels, which is really convenient especially when it’s a large file like a video or a webinar recording.
    • I also really enjoy how it keeps most of these conversations out of email, which tend to get ignored.
    • The desktop notifications can really be helpful and keep you up to date with what’s going on in the channel conversations.
    • In my opinion, the desktop notifications helps to solve the problem you get when you send an email that is never read.andnbsp;
    • The direct messaging is another great function that helps to keep your email inbox clean and organized. When you first sign up for a Slack account, I thought the automatic tutorial was clever and helpful.
    • You do have an option to skip the tutorial, but I thought it was very intuitive. Unlike Basecamp, you don’t receive email notifications when someone adds content into a conversation channel.
    • I like this feature because it once again keeps your email box clean.
    • In the channels, everything is also dated with a time, so you know when people posted.

    Cons :

    • We use Slack primarily to share information and have conversations. It's a great communication tool, and I can't say I have any negatives.

    • June 16, 2016
  • User review from

    Brett Jones

    Overall, my experience with Slack at my current role has been a positive one. It really does help to break down barriers between organizations, allowing employees, regardless of location, roles, department, etc., the ability to interact and communicate in a centralized dashboard.

    Ultimately, a clean and simple tool that connects the dots between people, groups, areas of discussion, you name it. Has quickly become our one-stop-shop for employees to effectively communicate amongst each other, share documents, feedback, so on and so forth. andnbsp;There's really no limit to what can be accomplished with respect to communication and document sharing, allowing for (but not limited to): individual communication, group channels, company-wide messages, etc.

    Pros :

    • Easy to use interface makes understanding the system a breeze.
    • Works out of the box but easily able to be further configured based on needs and requirements.
    • Effective communication between users (both on an individual level, as well as group messages [of any size]).
    • A professional mix between email functionality and instant messages, providing the best of both worlds.
    • Simple notification methods to relay when something has been updated in the chat thread.
    • Easily distribute documentation for peer and group review / brainstorming sessions.
    • Chat logs allow for historical reference of conversation, similar to a blog of a particular topic.

    Cons :

    • Tough to go wrong with a corporate chat tool; they've been able to keep everything nice and simple - providing a nice, clean user interface (UI), while still providing increased functionality that you'd expect to leverage email for.
    • A quicker notification method (desktop or text) may be handy as often times my Slack window remains open in a tab of my browser but can go by the wayside with my day to day work piling over top of it; perhaps available already, just needs some added tweaking on my end in the settings.
    • As an end-user of the tool I really don't have any negative items to address.

    • June 2, 2016
  • User review from

    Henry Plant VI

    Slack is simply the best tool for communicating with your peers in the workplace hands down. In runs circles around Skype simply in its ability to allow you to drop images / files into the communication box. It then stores those images very long time allowing for you to search for them at a much later date. I work for a creative agency, so we are constantly using this feature to swap designs back and forth throughout the day.

    The search is one of the best features I have seen to date. I consistently use the search feature to see what project I was working on during a given date and how much time I spent on that project- very handy for recording your billable hours. Also, slack has more plugins than you can shake a stick at! Dropbox and giphy integration are fantastic and are used quite regularly by people inside our office.

    Pros :

    • Search Feature is unmatched.
    • Ability to display and store images that are dropped into the chat dialog.
    • Ability to add annotations ( great for coders).
    • Integration with services such a dropbox and giphy.
    • Ability to create channels.
    • Suburb integration with their mobile platform.

    Cons :

    • PLEASE FOR THE LOVE OF GOD let me change default download folder! I have contacted slack about this, and they have zero interest in adding to this very basic function. If you can change the default download folder on any web browser I don't see why this would be an issue for slack, but it is.
    • The platform is very buggy at times- virtually all members of my office have had problems with their slack client at some point.

    • May 27, 2016
  • User review from

    Eric McCarthy

    Clean and easy to use. Very good for keeping multiple workers connected if they are in the same room or different parts of the world. If you work in an environment where your company has multiple offices across the country or employees that work from home, then Slack is the best way to keep everyone connected. If it's for general discussions or specific discussions Slack keeps conversation easy and organized.

    Slack is a good way to cut down on email for simple questions but still retain the records of conversations.

    Pros :

    • You can search discussions for keywords to follow up on past topics. Unlimited messaging between users.
    • Create threads under specific topics.
    • This lets you manage conversations as they apply to certain projects.
    • Good for keeping a history of message so they can be reviewed at a later date.
    • The channel can be private or you can add more users to a specific channel to keep everyone in the loop.
    • Desktop app works well with notifications and sounds so you know when you have new messages.
    • Desktop app makes sending attachments very easy.
    • You just drag and drop the files you want to send or just copy and paste an image in the conversation. Then you can just click on the image to view, no need to download first. Slack will also integrate with Dropbox if you send a dropbox link.
    • Smartphone apps help to keep you connected to when you are on the move. Lots of customization options with the colors a themes.
    • You can use direct messages just to make communication easier if the conversation doesn't relate to a specific channel.

    Cons :

    • Had some issues with getting alerts to work.
    • Search feature seems a little hard to navigate at first.
    • Some of a learning curve to fully take advantage of all the benefits of Slack. andnbsp;

    • May 24, 2016
  • User review from

    Enmanuel Durán Salas

    I have used Slack for almost a year now, and it's been the best experience I've had. When it comes to team communication, centralized ideas, meetings and more it's probably the best option to go. You can all share your ideas and help each other at the same time, the best part is that you actually enjoy using it. I personally used it in the web version the first time, then I decided to use it in the desktop version and it's been more than great.

    Pros :

    Using slack is great for a lot of reasons, here are some of them:

    • Multi plataform support, it's supported in almost (if not all) the OS and if not you can always use the web version.
    • Integration of apps, you can add extra features to slack by integrating new apps to it. Apps add functionalities to it and improve team communications depending on what is required.
    • File sharing is easy, fast, simple, uploading and downloading files is not a problem and when you are working, this is really important to improve times.
    • Channels, you are able to divide by groups your teams in order to increase efficiency, slack allows you to create different channels and with this you don't have to put everybody in just one place, it's one of the things I like.
    • User Interface and User Experience are just Amazing.

    Cons :

    • I don't really have any complaints about slack and its features, in my criteria, it has all the things a Team communication tool should have. Remember it's not a planning software sometimes people confuse these two.
    • On the technical side, Slack requires a ridiculous amount of memory to work well on your computer in the desktop version and this is something you will notice if you don't have a good PC. If you have some problems with this, I recommend using the web version.

    • May 6, 2016
  • User review from

    Alessandro Castellani

    By using Slack everyday at work you will drastically remove the amount of emails shared internally.

    The software is perfect for internal conversation and quick updates between coworkers. The ability of creating channel it's helpful to maintain the conversation organized and related to a specific topic.

    With the paid version you can manage private channels, better organize team members and maintain the archive of your past conversation.

    Pros :

    • Faster and better organized conversations in your office
    • Plenty of Apps and Integration to extend the functionalities
    • Good notification system
    • Good mobile and Desktop native app

    Cons :

    • Can be really distracting if you have too many conversations going on
    • Dangerous if you decide to integrate Clients in specific channels. It opens the possibility of writing something that you don't want to share with a client.
    • The search functionality is not really good.

    • April 26, 2016
  • User review from

    Javier J. Hernandez Garcia

    All opinions are personal and they don't reflect the opinions of my employer either past, present or future. Slack is without a doubt one of the best professional chat tools out there. If you are working in a place that have people working all around the world you need a great professional communication tool. Slack is just that and more.

    Pros :

    • You can do hashtags or tag users so they know that they have to address an specific message. You can upload any sort of files.
    • And on top of all that you can send direct messages to users if you want to talk something more personal or discuss an important business topic more privately.
    • They also have a funny intro message that you can customize.
    • You conversations are all private within the group. You create your on chat group (aka the chat of your company) and all your employees can communicate among each other).

    Cons :

    • Their search tool isn't that great and is really hard to find things if you don't remember exactly what you are looking for or if you don't know much about Slack.
    • Perhaps Slack biggest issue is that, you really need to know Slack to use Slack properly. For example marking messages with information that you will need in the future could be super important for you as that information may be hard to find just by doing a search.
    • The search tool doesn't make any distinctions between channels and direct message and it doesn't show first the messages from the channel or the direct conversation that you are seeing at the time.
    • There's not really a homepage for the group and take make things a bit confusing.

    • April 13, 2016
  • User review from

    Robert Belton

    Slack is an impressive tool with "channels" to organize communication, and can eliminate the all-too-familiar endless email strings with multiple people chiming in when a collaborative platform would be more ideal. Direct messaging and private group messaging can allow the direct communication between team members as well, and ignore the external conversations from occurring when it's time to focus!

    Pros :

    • Drag and Drop's file sharing within the software is great!
      -It's extremely easy to use, and is one of the few platforms where it is ACTUALLY the two simple steps of dragging and dropping.
    • The fact that collaborative communication can live in one location while not being favorable to one platform (Android or iOs) over the other is nice, and mobile application support is great by slack's customer service team.
    • The functionality of allowing multiple channels to existing within the instance is also quite impressive, and doesn’t slow anything down or create any organizational nightmares within the UI while viewing on a phone or anything like that.
    • The simple drop down buttons are easy to navigate on mobile devices, and while on a traditional PC or laptop the notifications are highlighted and easy to follow as guides to know what needs your attention or follow-up.

    Cons :

    • I have two complaints about the software. The inability to mass-delete direct messages or chat history within channels or direct messages.
    • You would have to go and individually delete every single message to get rid of a chat history with an individual, and that is very annoying...
    • Administrators can also view your message history, even when it’s deleted. That shouldn’t be an issue for someone like me who keeps all work related software usage “safe” for work, but it seems rather intrusive if you had a boss who decided to peruse the direct message section of the boards for whatever reason.

    • March 4, 2016
  • User review from

    Joel Tanzi

    Slack is a massive improvement over email in its ease of use, access controls, and tremendous breadth of supported formats for sharing data.

    One of Slack's strongest features is the ability to carry on topical conversations in private channels. This may seem like a bit of a throwback to the days of IRC chats, but an important difference is the ability to restrict access to channels to specific users, allowing you to have private conversations when needed, and switch back to a channel with broader access when appropriate. andnbsp;It's a feature sorely missed in email.

    Adding files to your conversations is a breeze; just drag and drop the file from any folder to the conversation window and Slack will do the rest. Slack also supports linking to content online and will display that content if it is in a supported format, such as a GIF, JPEG, or news article. andnbsp;Slack will also integrate with cloud storage services such as Dropbox, Google Drive, and Box, and you can just paste a link from these to your document into Slack, and it will immediately sync up your document to your conversation with no need for you to do more.

    Integration doesn't end there, either. You can configure Slack to handle notifications from other applications so you can work from Slack without having to switch between other applications, such as GitHub, IFTTT, and email.

    Although Slack really excels at communication over group channels, you can still directly message individuals and make use of the same features available for group chat. andnbsp; In addition, Slack has terrific search capabilities. Don't remember that thing your coworker said a month ago that would be really handy now? andnbsp;Slack has you covered. You can easily search your entire archive of communications and use handy modifiers to restrict your search by time period, channel, etc. andnbsp;

    Teams seeking to collaborate more effectively would do well to seriously consider adding this product to their workflow.

    Pros :

    • The ability to control access to channels, separate channels into relevant topics of conversation.
    • Easily link or attach documents, images, links, GIFs, videos, or just about anything else to a message with simple drag-and-drop features makes this the ideal tool for team communication.

    Cons :

    • Not very useful for an individual working outside a team.
    • Better support for public channels would be useful.
    • While boosting project management, look out for your team spending too much time "Slacking" and losing focus on work if you're not careful.

    • February 22, 2016
View All Alternatives

Alternatives to Slack


Free Download: Enterprise Networking Software Pricing Guide

Enter your email and press continue to start downloading.

Detailed comparison of the 10 best Enterprise Networking software!

One last step to begin your download:

Complete this brief form and we'll email you the PDF document.

Thank you for downloading the Detailed comparison of the 10 best Chat & IM software white paper..

The white paper has been sent to your email. You can also download it right now from this URL: Detailed comparison of the 10 best Chat & IM software

Other must read white papers for you

clic to downlaod
Download This whitepaper
whitepaper image
3 Industry Secrets for Smarter Customer Engagement
clic to downlaod
Download This whitepaper
whitepaper image
Making the most of your cloud CRM with an integrated cloud contact center
clic to downlaod
Download This whitepaper
whitepaper image
Distance without the disconnect

Detailed comparison of the 10 best Chat & IM software