We're using Slack to communicate with other partners outside of our company. In most of the cases, it's for external communication.
Dealer at Invaxa
Great for communication, easy to implement, and can expand as needed
Pros and Cons
- "The product has the ability to scale."
- "We’d like it to have more capability for everyone to work on one doc in real time all at once."
What is our primary use case?
What is most valuable?
Basically, it’s great for getting different kinds of groups with different partners - let's say one with the IT, one with the payment solution, into one place. It’s used just to communicate and nothing more than that. It's just a better solution to use instead of Skype or any other standard application.
It is easy to set up.
The solution is stable.
The product has the ability to scale.
What needs improvement?
The last time I tried to work with some other partners on the same document, we couldn't figure out a way to work on the same one. We actually have to have one person gather all the documents and then prepare one. It was actually taking way much longer than usual. We’d like it to have more capability for everyone to work on one doc in real time all at once.
For how long have I used the solution?
I’ve been using Slack for three or four years.
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Slack
April 2025

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What do I think about the stability of the solution?
The solution is very stable. It doesn’t have bugs or glitches. It doesn’t crash or freeze. It’s reliable.
What do I think about the scalability of the solution?
I haven’t seen a lack of scalability. It seems like it would be easy to expand.
Most of our colleagues use the solution. We have around 100 people on the solution.
How are customer service and support?
I haven’t used technical support. I can’t speak to how helpful or responsive they are.
Which solution did I use previously and why did I switch?
We’ve also used Skype.
How was the initial setup?
It's easy to set up. The IT team didn’t take that long to install it. There’s nothing wrong with that.
What's my experience with pricing, setup cost, and licensing?
I don’t deal with the licensing aspect of the solution.
What other advice do I have?
I'm not sure about the version I'm using. IT is taking responsibility for that.
I’d recommend the solution. It's easy to use. You just kind of need to use it more often just to get used to it and see how it works. It's nothing hard to figure out. It's easy to start.
I’d rate the solution an eight out of ten.
Disclosure: I am a real user, and this review is based on my own experience and opinions.

Sales Executive at Gumlet
Has a great user interface and functionalities and helps with remote communication
Pros and Cons
- "The solution has a great user interface and functionalities. It has good features that we can use. We can integrate any third-party application with Slack so that it provides you with insights and updates in real-time on Slack itself."
- "The solution needs to improve its scalability."
What is our primary use case?
I use the tool to communicate with my team because we work remotely since COVID.
What is most valuable?
The solution has a great user interface and functionalities. It has good features that we can use. We can integrate any third-party application with Slack so that it provides you with insights and updates in real-time on Slack itself.
What needs improvement?
The solution needs to improve its scalability.
For how long have I used the solution?
I have been using the solution for four to five years.
What do I think about the stability of the solution?
I would rate the product's stability a ten out of ten.
What do I think about the scalability of the solution?
I would rate the solution's scalability a nine out of ten. My company has 60 users for the product.
How was the initial setup?
The solution's initial setup is easy. You just have to sign up with your work email and you're good to go. We have deployed the solution on the cloud.
What was our ROI?
The product is worth its money.
What's my experience with pricing, setup cost, and licensing?
The solution is expensive.
What other advice do I have?
You can use this solution if you want to give your employees a good experience in communication.
Disclosure: I am a real user, and this review is based on my own experience and opinions.
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Slack
April 2025

Learn what your peers think about Slack. Get advice and tips from experienced pros sharing their opinions. Updated: April 2025.
851,823 professionals have used our research since 2012.
Project Manager - Business Consultant at Comtrade System Integration
An easy to use, cost-effective collaboration tool with all the functionality that we need
Pros and Cons
- "Slack makes it easy for employees to contact each other and exchange documents or information."
- "I would like to see a special feature for multiple people to collaborate on a document, working on it at the same time."
What is our primary use case?
We are using Slack to collaborate between employees, as many of them are working from home. While I personally started using it a couple of years ago, it has been about a month since all of our employees began using it.
How has it helped my organization?
Slack allows our employees to share information on a daily basis without overloading email.
What is most valuable?
This solution is easy to use.
Slack makes it easy for employees to contact each other and exchange documents or information. It is not like a big CRM but for internal usage, it's good enough.
What needs improvement?
I would like to see a special feature for multiple people to collaborate on a document, working on it at the same time.
For most add-ons, clients need to know the command to run the add-ons. I think it would be useful for them to design the appropriate icons so that non-IT clients can launch them in a simple and easy way. For example, starting a video conference with an already defined room.
It would be useful for an organization to be able to define a specific storage space for the storage of all documents exchanged by teams
For how long have I used the solution?
I have been using Slack for two years.
What do I think about the stability of the solution?
This is a stable solution.
What do I think about the scalability of the solution?
We are only using the free version so I do not really know about the scalability.
We have 300 users and daily, there are 60% to 70% of them using it.
How are customer service and technical support?
I have not needed to contact technical support.
How was the initial setup?
Slack is very easy to set up and there are only a few steps involved.
What about the implementation team?
We deployed this solution ourselves. It was easy to send employees invitations to join.
What's my experience with pricing, setup cost, and licensing?
We use the free version that does not have a license.
Which other solutions did I evaluate?
We may use Microsoft teams in place of Slack in the future, although this is not a decision that I will be part of. At this time, there is not much interest in moving to Zoom or Teams.
We did not want to spend too much time investigating options before starting our remote work and because I was familiar with Slack, this is what I chose.
What other advice do I have?
My advice for anybody who is researching Slack is that it is easy to set up and quite helpful for daily common things. We use only the free license but it is enough for us. If we continue to use Slack after the current crisis ends then we may buy more features and add-ons. For now, however, we have what we need.
Overall, we are satisfied with Slack.
I would rate this solution an eight out of ten.
Which deployment model are you using for this solution?
Public Cloud
Disclosure: I am a real user, and this review is based on my own experience and opinions.
CTO at UnblockAfrica
Real-time collaboration and simultaneous document editing increases team productivity
Pros and Cons
- "Its intuitive design makes it easy to use and understand, hence we do not have a need to spend much on educating our teams."
- "The only area of concern that I have is with the inability to preview received documents without having to download them first."
What is our primary use case?
I mainly use Slack as a collaborative chat, video and audio tool. I am able to set up a Slack room for different purposes and have all major stakeholders collaborate in real time. I enjoy the functionality on Slack that enables my team members to edit and collaborate on documents simultaneously.
How has it helped my organization?
Slack has helped to increase the productivity of my teams and organization. We have been able to cut down on subscription costs, reduce client delivery time, troubleshoot more effectively, and achieve positive results more easily. Its intuitive design makes it easy to use and understand, hence we do not have a need to spend much on educating our teams.
What is most valuable?
Chat, video, and call functionality has been awesome. The ease of setting up and integrating with other apps is seamless. Data consumption by the app is also at its barest minimum, helping to cut costs on the amount of data required to explore calls, video, or chat functionalities within the app.
What needs improvement?
I think the app is good enough, as I don't have any reason to comment negatively on it. The only area of concern that I have is with the inability to preview received documents without having to download them first. This could offer some sense of security and prevent downloading corrupted files or viruses.A "preview attachment/document" would suffice as an improvement, this will allow users decide if the need to download an attachment or not
For how long have I used the solution?
More than two years.
What do I think about the stability of the solution?
With respect to the stability, the app functions well, without glitches.
What do I think about the scalability of the solution?
This is a very scalable solution.
How are customer service and technical support?
Technical support for this solution has been very helpful.
Which solution did I use previously and why did I switch?
I did not use another solution prior to this one.
How was the initial setup?
The initial setup is very easy and straightforward.
What about the implementation team?
The vendor handled our implementation and did a professional job.
What was our ROI?
Our ROI is approximately 40%.
Which other solutions did I evaluate?
I have evaluated both Microsoft Teams and Skype.
What other advice do I have?
This is a great app that has awesome functionality. A try will definitely be worth it.
Disclosure: I am a real user, and this review is based on my own experience and opinions.
Project Engineer at CDAC
Enables communication with the developer community and has a very good portal
Pros and Cons
- "The portal is at its best version now."
- "Sometimes, the servers are not available."
What is our primary use case?
I use the solution to communicate with the developer community. If I have any issues, I reach out to them for troubleshooting. I also use the product to know about upcoming tool upgrades. We use the solution as a community to reach out.
How has it helped my organization?
We use Dependency Track. I had multiple issues during the configuration. I contact the tool developer using Slack to identify the issue. The developer provided me with a resolution, and the issue was resolved.
What is most valuable?
Sometimes, someone has already faced issues similar to what we are facing. Instead of asking the question again, we can search the question and look for the remediation that is already mentioned. The portal is at its best version now. There shouldn't be any changes. The solution provides two-factor authentication. The integrations are good.
What needs improvement?
Sometimes, the servers are not available. It is rare, but it happens.
For how long have I used the solution?
I have been using the solution for two years.
What do I think about the stability of the solution?
I rate the tool’s stability a ten out of ten.
What do I think about the scalability of the solution?
The tool is scalable. We have 20 users in our organization. Only some people in the organization do R&D work.
What other advice do I have?
Overall, I rate the product a ten out of ten.
Which deployment model are you using for this solution?
On-premises
Disclosure: I am a real user, and this review is based on my own experience and opinions.
Solution Consultant at Apptio
A perfectly scalable tool that is easy to use and enables organizations to stay in contact with partners and create workspaces
Pros and Cons
- "The product is easy to use."
- "The integration with SharePoint doesn’t work properly."
What is our primary use case?
I use the solution mainly for chat. I go on spontaneous calls with colleagues. We also have channels for specific topics or customers and share workspaces with partners. Some of our partners also use Slack. So, we use shared workspaces and channels, which is a very good way to stay in contact with them.
What is most valuable?
The product is easy to use. It provides an easy way to stay in contact with partners and create workspaces. We can exchange information, have discussions, and search for information. We create channels for technical topics. It is quite useful to find answers because others in the team might have the answers to our questions.
What needs improvement?
The integration with SharePoint doesn’t work properly. It might be due to an access issue in the company. It is quite annoying. Sometimes, we cannot copy a shared document, but it might be because of the settings.
For how long have I used the solution?
I have been using the solution for four years.
What do I think about the stability of the solution?
The tool is super stable.
What do I think about the scalability of the solution?
The tool is perfectly scalable. The whole company uses it. We have around 1000 users. My colleagues at IBM have an even larger installation that works quite well.
Which solution did I use previously and why did I switch?
Our organization has multiple tools, like Microsoft Teams, Zoom, and Webex. I can choose the one I like. I chose Slack because it is easy to use, and the spontaneous communications and channels are very useful. I prefer Slack for chats, channels, and exchanges with partners, but I prefer Teams or Zoom for web meetings, training, and webinars.
How was the initial setup?
The product is easy to set up. The solution is deployed on the cloud.
What other advice do I have?
I recommend people to start using the solution. And make sure you use the status feature and synchronize it with Outlook, so that people can see when you are busy. Overall, I rate the tool a ten out of ten.
Disclosure: I am a real user, and this review is based on my own experience and opinions.
A user-friendly and affordable solution that enables seamless communication within teams
Pros and Cons
- "The product is user-friendly."
- "It is difficult to navigate the tool when I log in to two devices and start a video call."
What is our primary use case?
I use the solution for communicating with all the teams. We can communicate with people from other countries.
What is most valuable?
The product is user-friendly. It is easy to use. The colors, the menu, and the sidebar on the interface are good. Push notifications work well on mobile devices. It is what I need. It is helpful and useful for me. I am happy with the video calls.
What needs improvement?
It is difficult to navigate the tool when I log in to two devices and start a video call. If I log in to two devices, I get logged out of video calls.
For how long have I used the solution?
I have been using the solution for the last four months.
What do I think about the stability of the solution?
The product is stable.
What do I think about the scalability of the solution?
Almost ten to fifteen people in my organization are using the solution. The product is scalable.
How was the initial setup?
It is easy to set up the tool.
What's my experience with pricing, setup cost, and licensing?
The solution is cheap in my country.
What other advice do I have?
I have not used live streaming. I use the tool on both my desktop and on my mobile device. It works better than Trello. I would recommend the solution to others. Overall, I rate the product a nine out of ten.
Disclosure: I am a real user, and this review is based on my own experience and opinions.
Social Selling Strategist & Social Media Marketing Programs Manager at a consultancy with 1-10 employees
The most valuable features are direct messaging and having conversations in channels.
What is most valuable?
Direct messaging and having conversations in channels. I love the channels feature, because it allows you to sort conversations. The only people who will see those conversations are people who are interested in that channel or are part of that initiative/project.
How has it helped my organization?
We have slashed our internal emails by 30% and streamlined the tools we use for instant messaging.
What needs improvement?
The profile feature needs improvement. There is little room to add details to this section. It would be nice to be able to add more links or have other ways to connect in this section.
The ability to flesh out the Profile section in Slack by including links
to multiple social channels, a beefier bio and a link to a website would
be helpful for communities using Slack. This feature may not be as
necessary for teams using Slack as an internal communication tool, but
it would encourage them to follow each on other social channels and
potentially spark more engagement across channels.
For how long have I used the solution?
I have been using Slack for just over a year.
What do I think about the stability of the solution?
We have not had stability problems.
What do I think about the scalability of the solution?
We did have scalability issues. If you are on the free plan, you are only allowed 10,000 messages before everything is archived. This is a big problem for an alumni group which I am a member of that uses Slack.
Our messages are archived every two weeks, which makes it challenging to search for former conversations.
The price of using Slack would be $30,000/year for that community, which I think is quite steep.
How are customer service and technical support?
I've never used technical support.
Which solution did I use previously and why did I switch?
I used Skype for instant messaging and LinkedIn/Facebook groups for community engagement. Skype is clunky and has an outdate user interface.
Slack is slick, smooth, and easy on the eyes.
LinkedIn/Facebook groups are cluttered and distracting. It's too easy for an "oh, shiny" moment to happen on those social platforms.
How was the initial setup?
The setup was straightforward. Slack is great about walking you through the process of setting up channels and inviting people to join.
What's my experience with pricing, setup cost, and licensing?
Stay on the free version and use PaperBot in every Slack channel to "archive" conversations. This helps you work around the problem with 10,000 messages.
Which other solutions did I evaluate?
We looked at Skype for instant messaging and Discourse for community engagement.
What other advice do I have?
If you're looking for an asynchronous/real-time communications tool, you will not find any app that comes close to Slack.
Disclosure: I am a real user, and this review is based on my own experience and opinions.

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