Who Uses This Software?

Our customers range from two-person startups to Fortune 100 corporations. In fact, 77% of the Fortune 100 uses Slack.

Average Ratings

15,800 reviews
  • Overall 4.5 / 5
  • Ease of Use 4.5 / 5
  • Customer Service 4.5 / 5
  • Features 4.5 / 5
  • Value for Money 4.5 / 5

Product Details

  • Starting Price US$6.67/month
  • Free Version Yes
  • Free Trial Yes
  • Deployment Installed - Mac
    Cloud, SaaS, Web
    Installed - Windows
    Mobile - iOS Native
    Mobile - Android Native
  • Training In Person
    Live Online
    Documentation
  • Support Online

Vendor Details

  • Slack
  • https://slack.com
  • Founded 2014

About Slack

Slack is a collaboration hub, where the right people and the right information come together, helping everyone get work done.

When your team needs to kick off a project, hire a new employee, deploy some code, review a sales contract, finalize next year's budget, measure an A/B test, plan your next office opening, and more, Slack has you covered.

Try Slack with your team for free.

Slack Features

  • Agile Methodologies
  • Budget Management
  • Client Portal
  • Collaboration Tools
  • Cost-to-Completion Tracking
  • Customisable Templates
  • Gantt Charts
  • Idea Management
  • Kanban Board
  • Milestone Tracking
  • Portfolio Management
  • Resource Management
  • Time & Expense Tracking
  • Traditional Methodologies
  • Activity/News Feed
  • Calendar Management
  • Chat / Messaging
  • Discussion Threads
  • File Sharing
  • Push Notifications
  • Search
  • Surveys & Feedback
  • Task Management
  • Video Conferencing
  • Audio / Video Conferencing
  • Calendar Management
  • Call Recording
  • Call Routing
  • Chat / Messaging
  • Fax Management
  • File Sharing
  • Mobile Access
  • Multi-User Collaboration
  • Voice Mail

Slack Most Helpful Reviews

Slack the best team communication software ever

Reviewed on 26/9/2019
Heshani H.
Software engineer
Computer Software, 13-50 Employees
Used the Software for: 1+ year
Reviewer Source 
5/5
Overall
5 / 5
Ease of Use
5 / 5
Features & Functionality
4 / 5
Customer Support
3 / 5
Value for Money
Likelihood to Recommend:
Not Likely Extremely Likely

Comments: We use slack in our office as the main communication app. We can connect with our overseas clients through slack so easily. As we can share rich media, we have everything in a single thread. And we have the ability to reply to the each message in the thread. Also we can delete unwanted messages. The best thing is we have set reminders for important tasks. So the overall experience is really nice and I am thankful to the slack developers.

Pros: We can create channels for separate projects and same time me can send direct messages for each other company members.
We can share texts, images,videos, audios, gif files and any rich media with others
We can set reminders for our work and slack bit is going to remind us our work
We can integrate other software like Skype, Hangouts,Gmail and many applications to slack, so that we can receive all the notifications through slack.
We have search options, so that we can search for previous texts we sent someone or in a certain channel.
Also there is an option to switch the do not disturb mode on. In that time we are not getting notifications.
We can easily use the web, desktop and mobile application so we can access chat via any device.
Considering all the matters I love this app.

Cons: I experienced some issues while getting voice calls.
Also it saves a limited number of lines in each chat thread. So we can not reference our earliest messages in threads.
These are the only issues I have experienced. But these are not that strong reasons to not to use this app.

Robust product that fosters effective communication and collaboration!

Reviewed on 19/9/2019
John B.
Senior Program Manager
Computer Software, 1,001-5,000 Employees
Used the Software for: 1+ year
Reviewer Source 
5/5
Overall
4 / 5
Ease of Use
5 / 5
Features & Functionality
Customer Support
Value for Money
Likelihood to Recommend:
Not Likely Extremely Likely

Comments: Our organization deployed Slack alongside a legacy client. The initial plan was to run both in parallel indefinitely, mostly because change is hard and there would be complaints. But Slack was so quickly adopted by a broad user base, the legacy client was officially retired after just a few months. Slack has been incredibly effective at fostering group communication and bringing our organization together. There are colleagues on Slack that never even used the legacy client. Whenever possible, Slack is used as an email alternative. Slack is also very robust with plenty of customization and integration. I have only scratched the surface of available options but the Slack Outlook Calendar "app" has been very useful. There have been some very infrequent (less than one per quarter) outages or availability issues but Slack has been quick to acknowledge and resolve the issues. Overall I am very pleased and would highly recommend Slack.

Pros: - Flexible notifications allow users to control frequency and delivery methods for messages
- Default options or custom emojis can be used for current availability status
- Availability status can be set to automatically clear after a specific period of time
- Messages can still be sent to users even when they are offline/unavailable
- Key contacts can be "starred" and maintained in a sidebar list for quick access
- Communication across large groups is facilitated via "Channels"
- Posting a new message in a "Channel" includes options to notify all users in the group
- Custom start and end times can be set for the "Do Not Disturb" function
- Extensive user preferences include themes with customizable hex colors
- Integration with other productivity tools via "apps" (Outlook Calendar app is especially useful)
- Support for custom emojis, loading messages and channel prefixes
- Mobile app is extremely user-friendly

Cons: - Dark theme (mode) does not apply to the sidebar, only the main chat/message window
- On the desktop app, your own account ("you") appears at the top of the Starred list (preferred) but on the mobile app "you" is sorted among all other Starred users
- Occasional but very infrequent outages or availability issues

Slack Review

Reviewed on 18/9/2019
Ankush K.
Engineer
Computer Software, 1,001-5,000 Employees
Used the Software for: 1+ year
Reviewer Source 
5/5
Overall
4 / 5
Ease of Use
5 / 5
Features & Functionality
4 / 5
Customer Support
4 / 5
Value for Money
Likelihood to Recommend:
Not Likely Extremely Likely

Comments: It's one of the coolest apps I've tried, I'm glad I got a chance to switch from Skype.

Pros: It's best made for any type of communication chat, sharing files (pdfs, doc, xlx), code etc. It has some cool features which I use every day like set reminders, easy integration with other apps like Datadog/Airflow to set alerts/notification for your product. Search option is really amazing where you can search for text, word or pdf file. The other options are to make Alias which is important I think when you don't want to notify the whole channel and just type @Alias rather than @here.

Cons: The only issue I had with it is that it freezes sometimes on my laptop, my chat windows on my phone do not remain in sync with chat windows on the laptop like with my Hazy memory if I'm talking to someone on phone and don't remember the name of person I won't be able to get back to him from my laptop. I also use its free version which I kind of doesn't like as it only stores 10k messages. So I guess the recent contacts/conversation option might need some enhancements for better user experience. Also, intoroducing some Calendar feature would be great in future.

Communication made easy

Reviewed on 13/9/2019
Verified Reviewer
Incident Management
Information Technology & Services, 501-1,000 Employees
Used the Software for: 1+ year
Reviewer Source 
4/5
Overall
5 / 5
Ease of Use
4 / 5
Features & Functionality
Customer Support
Value for Money
Likelihood to Recommend:
Not Likely Extremely Likely

Comments: Slack is a very good tool with many add-ons that can help your business with communication, reminders, etc. The library of add-ons is growing.
The only thing is that I wish the search was a little bit better, you often find irrelevant hits and it is a bit hard to exclude channels or people in your search.

Pros: How easy it is to use.
It is easy to chat with other members in the organization, it is easy to start small chat groups, for more permanent groups you can start channels, both public and private.
It has both voice calls and video calls that are fast and smooth with great quality.

Cons: It is a bit harder to cooperate with other companies, where skype is available for anyone and you can easily add any contact, in slack you need an administrator to add a quest to the workspace. a good thing is that for each paid license you have in the company you can invite 5 guests that have access to a single channel(single-channel guest). a small con is that you need to pay a license for any guest that need access to more than one channel(multi-channel guest) The search function could offer a few more options

Google Hangouts Replacement, Saved us from Teams

Reviewed on 12/9/2019
Verified Reviewer
Owner
Information Technology & Services, 2-10 Employees
Used the Software for: 6-12 months
Reviewer Source 
5/5
Overall
4 / 5
Ease of Use
4 / 5
Features & Functionality
Customer Support
4 / 5
Value for Money
Likelihood to Recommend:
Not Likely Extremely Likely

Comments: I actually enjoy Slack. It is fun to use, and I like much more than sending an email.

Pros: Slack really allows us to communicate effectively based on group or subject. We can communicate directly in the General chat, directly, or in any number of specialized group channels. Each team has their own channel, and if needed, that channel can be locked to prevent other teams from entering. Most are open channels that allow for any of our teams to come in and converse on the subject titled. One our favorite things to use are external apps. I love that Slack will pop up an upcoming appointment or if we need a meeting in say Zoom, I can just type /zoom and it will generate a Zoom link and we can all join in. We are on the free tier, so with the higher level tier, you can get conferencing and a wealth of other features added in. The free level serves us very well. We use email integration also, so important emails and even things like weather alerts pop up as a Slack notification. It is really a great service.

Cons: Can be confusing to use if you are not used to chat systems such as Hangouts or WhatsApp though. The idea of a separate room, or Group chat, confuses some, but once they see how things work, it is a non-issue.

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