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Slack Business Instant Messaging Software logo
Slack
4.5
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Slack Reviews: 4.5/5 — Highly Rated

Slack Overview
What is Slack?

Slack is the top choice for teams to communicate. It provides a virtual workspace that helps teams maintain open communication in a business environment. With Slack, users can host voice and video calls with up to 15 participants and even screen share with a desktop app, empowering better user interaction. Slack also supports options for private and group sessions, and one of its best features is Slack Huddles–an informal meeting space that lets you directly talk to your channel where you can share screen side by side with your team. The platform integrates well with Dropbox, Google Drive, and Trello as well.

Company Salesforce
Year founded 1999
Company size 10,001+ employees
Headquarters San Francisco, California
Social Media
Managed by:
AG
Axel Grubba
Founder
Slack Categories on Findstack
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Ask Questions about Slack
What Slack is best for?
How does Slack compare to Zoho Cliq?
What are the pros and cons of Slack?
Slack Product Details
Capabilities
API
Segment
Small Business
Mid Market
Enterprise
Deployment Cloud / SaaS / Web-Based, Desktop Mac, Desktop Windows, Mobile Android, Mobile iPad, Mobile iPhone
Training Documentation
Languages English
Slack Pros and Cons
Pros
  • Allows users to access handy productivity tools.
  • Offers app integrations and API access
  • Comes with extensive security.
  • Lets users collaborate file sharing and video meetings
  • API allows software developers to create custom integrations
Cons
  • No course creation
  • Limited engagement options
  • Notification frequency is too high
  • Screen sharing and drawing tools aren’t supported on mobile devices
Slack Features
Admin Controls
API Access
Audit Logs
Bots and Automation
Calendar Integration
Contact Management
Customizable Notifications
Data Export
Desktop Access
Emoji Support
End-to-End Encryption
File Sharing
Slack Media
Slack - Slack Homepage
Slack Screenshots
Slack Homepage
Slack Homepage
Disclaimer
Our research is curated from diverse authoritative sources and meant to offer general advice. We don’t guarantee that our suggestions will work best for each use-case, so consider your unique needs when choosing products and services. Feel free to share your feedback.
Last updated: October 23, 2026
Slack Business Instant Messaging Software logo
28,674 Slack Reviews
4.5 out of 5
Mid Market (51-1000 emp.)
Dec 16, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Slack has almost removed the need for internal emails"
What do you like best about Slack?

Slack makes internal communication frictionless compared to sending emails due to being able to target individuals, groups, or channels, as well as selectively mention individual users or groups. Going through Slack notifications is much faster than the email inbox due to less boilerplate text and better structure of threads.

What do you dislike about Slack?

Slack does not remove the fact that communications are inherently messy, and thus even Slack use can become overwhelming. The biggest downside to Slack use is that people might start expecting faster replies than they would for email, but of course, this is organization-specific.

What problems is Slack solving and how is that benefiting you?

Slack helps enable internal communications (and in some cases, also communications with vendors, partners, and customers) in the hybrid/remote work era. It reduces the friction of communication.

Enterprise (> 1000 emp.)
Dec 16, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Built for remote work"
What do you like best about Slack?

love how easy it is to use, collaborate and find info.

What do you dislike about Slack?

really not much to dislike. Integrations need an admin but that is corporate security so I can't blame Slack for that

What problems is Slack solving and how is that benefiting you?

Collaboration and reducing email noise

Small Business (50 or fewer emp.)
Dec 16, 2021
 Source
Overall Rating:
5.0
KA
Khushboo A.
Associate Software Engineer
Share
"Slack review"
What do you like best about Slack?

1. Chat conversation 2. Audio conferencing 3. Video conferencing 4. File sharing 5. Integration of other products like Jenkins report, bitbucket , jira 6. Notifications 7. Group conversations

What do you dislike about Slack?

There is something I don't like about slack is syncronization of notifications on all devices where user is logged in. Slack can be shared with cost. It's not free for creating groups and conversations

What problems is Slack solving and how is that benefiting you?

1. Chat conversation 2. Audio conferencing 3. Video conferencing 4. File sharing 5. Integration of other products like Jenkins report, bitbucket , jira 6. Notifications 7. Group conversations

Mid Market (51-1000 emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Great Cross-functional Platform"
What do you like best about Slack?

I like that slack has multiple communication functions.

What do you dislike about Slack?

It cannot change the tone of notifications. Or the fact that you cannot assign different notification sounds to different conversations.

What problems is Slack solving and how is that benefiting you?

Not so much about solving problems, but a benefit of working on the slack platform is that it helps cut down on email traffic.

Small Business (50 or fewer emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Excellent way to communicate with team"
What do you like best about Slack?

Easy to integrate with other tools like Trello. What I more than like about it is the custom commands that slack has.

What do you dislike about Slack?

It has minimum file storage. The history search is limited to only 10000 latest entries.

What problems is Slack solving and how is that benefiting you?

communicate with the team. integrate with tools like trello. custom script hooks.

Small Business (50 or fewer emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Go Slack!"
What do you like best about Slack?

My favorite tool is the the different channels you can be a part of. It has made communication with colleagues so easy. Before I became a contractor, I never used it but it's now my favorite tool!

What do you dislike about Slack?

I haven't found anything I dislike about slack. There are a lot of integrations available.

What problems is Slack solving and how is that benefiting you?

I'm able to QUICKLY create new team messages, send a message privately, or if I need to make something widely known, a channel with everyone who is involved is the most useful. I also love integrations and how easy it makes my life.

Enterprise (> 1000 emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Essential business communication platform"
What do you like best about Slack?

Slack has become my go-to for communicating with my project team. In addition to primary messaging, the huddle tool is great - it has cut down on the need to use my cell phone for calls. Also, pinning documents and URLs to channels ensures that everyone can find key artifacts promptly.

What do you dislike about Slack?

The search is too broad and returns too many irrelevant matches; there should be additional filtering or search criteria to minimize the amount of time it takes to find something across channels.

What problems is Slack solving and how is that benefiting you?

Real-time collaboration and information sharing; We can stay in contact on the go and keep up to date on projects and tasks in flight. Out productivity and performance have significantly improved.

Enterprise (> 1000 emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
MS
Mikayla S.
Customer Service Representative
Share
"Best Communicate app"
What do you like best about Slack?

I like that slack has different groupchats for different uses and that I can receive notification for any message that have been sent to me by others. Also, I like how photos and gifs can be shared on slack.

What do you dislike about Slack?

Nothing. It's a great way to communicate and it's the only app, I've used while working at DoorDash. Slack has no issues when it comes to communicating with co-workers.

What problems is Slack solving and how is that benefiting you?

I'm able to retrieve information of questions I may have that can be similar to what people have asked and I like how the conversations can be saved and viewed by others and myself.

Mid Market (51-1000 emp.)
Dec 15, 2021
 Source
Overall Rating:
5.0
ED
Eileen D.
Director Of Business Development
Share
"Slack is Where it's at!"
What do you like best about Slack?

How you can keep track of and search conversations.

What do you dislike about Slack?

Notifications sometimes doesn't work on multiple devices.

What problems is Slack solving and how is that benefiting you?

Keeping conversations compartmentalized and organized is super helpful.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
KC
Kathleen C.
Sales Engineer
Share
"Slack is great for connecting your team!"
What do you like best about Slack?

I like the variety of channels where you are able to connect with coworkers with common interests.

What do you dislike about Slack?

There is nothing that I dislike about Slack.

What problems is Slack solving and how is that benefiting you?

Instantly connecting with coworkers and having a string of conversations about a topic that you can look back on to find answers from past conversations.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Review"
What do you like best about Slack?

I like that I can communicate with team mates

What do you dislike about Slack?

Not really any major complaints. Sometimes it lags which is annoying.

What problems is Slack solving and how is that benefiting you?

Communication with team

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"All-in-one Communication Tool"
What do you like best about Slack?

I love that I can view all of my "workplaces" in one app and easily switch between them. The Emojis are the most fun aspect and the fact that you can upload your custom emojis.

What do you dislike about Slack?

Doing something as simple as a poll is a little difficult, but you can find creative work-arounds. It's also difficult to find the right gifs

What problems is Slack solving and how is that benefiting you?

Slack allows you to access everyone else in the workspace. Some of my workspaces are networking groups and it gives you an easy way to meet new people and start conversations.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
JO
Jared O.
Business Advisor
Share
"Slack 8 month"
What do you like best about Slack?

Its a very useful and friendly user software. It definitely meets its purpose which is being a communication software. Really like the fact that you can add Gifs fropm the Giphy website and even view documents, such as PDF files, without having to download the file first. Notifications pop up, you can silence them and change your status. I really love that you can mark someone's screen whenever they are sharing it.

What do you dislike about Slack?

What I can think of is that you can't customize the time a status icon lasts. I have the option to change status to "in a meeting" and it lasts an hour, eventhough I have meetings that last less than that it only gives the option of an hour.

What problems is Slack solving and how is that benefiting you?

It has been really helpful to communicate during this home office time. Especially the calls and screen sharing feature, it is very helpful because you can mark/point places you need the person to look, almost as if you were there sitting next to that person.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
MW
Michelle W.
Full Stack Software Developer
Share
"A Review of Slack"
What do you like best about Slack?

This tool makes it easy to communicate with peers both individually as well as in groups. It is really easy to configure different groups or channels to communicate with peers working on the same project. In a professional setting, this is my most preferred tool for communication.

What do you dislike about Slack?

One issue that is cumbersome is that you are not able to add new members to a group chat once it has already been created. If down the road, if you decide another member needs to be included, you'll need to re-create a new group with the new user added.

What problems is Slack solving and how is that benefiting you?

The main use case for Slack is communication with peers at my full-time job. I communicate with peers individually as well as in a group or channel setting. This tool has made the shift to remote work a lot easier for me.

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
TB
Tamara B.
Technical Content Writer
Share
"Communicate, share and work with your team!"
What do you like best about Slack?

It's a powerful messaging tool with great features: it allows to share files and boards from the best cloud service tools for time/project management and file editing.

What do you dislike about Slack?

It's not straightforward to learn: you first need to signup to Slack, then follow several other steps to join the channels you need. I had some difficulties understanding how it works at first and needed help from other channel members.

What problems is Slack solving and how is that benefiting you?

It's the most complete professional messaging solution I've been using so far, even if I had some difficulties initially (but I sorted them out, as I said before). The search feature is outstanding, and it makes it easy to retrieve stuff from older messages in the conversation.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
CC
Courtni C.
Head Of Digital Content
Share
"Slack is an excellent messaging tool."
What do you like best about Slack?

There's a lot to love about Slack. First, it's getting widely known and used, so it's easy to integrate customers on a customer side, while keeping your company's side separate. Communication between those two workplaces is easy, which is important when customer communication and support are big parts of your business. Next, the integrations make it so functional. It has its own Wiki you can build in. It has Emojiis. It has gifs through GIPHY. It has integrations with Google Drive, Google Calendar, and Lattice. You can add images from your system. It gives you link previews if you want. You can mute channels. Just about anything, really. It makes keeping track of everything very simple and centrally located. It will alert you at a set amount of minutes before a meeting starts so you don't forget about it. It has a browser version, a desktop app version, and a mobile app version. It has public channels, private channels, group chats, and DMs. You can DM with yourself to jot down notes and reminders. You can set away messages, pause notifications, star important messages, and reply in threads to individual messages. The find feature also makes it so easy to look for anything you need to, well, find. You can make voice and video calls with it. It really is highly functional and quite user-friendly.

What do you dislike about Slack?

There's truthfully not much to dislike about Slack. The potential only gripe I have is not a gripe at all, it's a request. It'd be lovely if you could set yourself as away for certain channels or people, while remaining active for select groups/people. But I would be surprised if that's not a feature that's coming soon.

What problems is Slack solving and how is that benefiting you?

Communication is a breeze, regardless of who you need to talk to. Client communication is so easy, and being able to separate client and internal communication while still staying in the same place is truly remarkable. All the features listed in the positives section are the problems it solves and the benefits it has. Apps, integrations, reminders, finding features, everything.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Great way to communicate with colleagues on the go!"
What do you like best about Slack?

I can start a conversation with anyone in the organisation, share files and links and keep in touch with what's going on around the company utilising Slack channels. Integration with other apps (Google Calendar, Monday.com, etc.) is also pretty cool, allows notifications from said apps to then appear in Slack; it's great to be notified in one place!

What do you dislike about Slack?

Disappearing messages. After a while, older conversations will disappear from view, so I wouldn't recommend using it to preserve any information that may be important!

What problems is Slack solving and how is that benefiting you?

Collaboration with teammates and colleagues scattered across the globe, with Slack it's easy to keep in touch no matter where you are, you can also use your mobile phone if you're primary work laptop/PC is not at hand.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"The easiest way to connect remotely"
What do you like best about Slack?

Slack is great for connecting with your teammates remotely. I love how it is available on any device and platform. I have it on my mac, phone, and tablet to always catch up and reply on the go.

What do you dislike about Slack?

They recently introduced a new feature called Huddle recently, which is an absolute banger. However, there are still some teething issues that happen intermittently. The quality of the mic recording, for example, could be improved.

What problems is Slack solving and how is that benefiting you?

We were looking for an easy-to-setup messaging tool to communicate with teammates across different countries and timezone seamlessly. We needed a tool that would allow us to work remotely and asynchronously. Slack fits that use case ideally.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Best for Businesses and Universities"
What do you like best about Slack?

Slack is great for arranging tasks and projects.

What do you dislike about Slack?

I can't think of any issues at the moment. I find the app perfect for our setup.

What problems is Slack solving and how is that benefiting you?

Organizing several projects made easier by Slack.

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"intuitive and fun to use"
What do you like best about Slack?

it's fun to use. easy to use. i love the suggestions slack sends you. you can use slack for anything from work to interest groups, personal chats, etc. Its my favorite messaging application. Love the remind me functions

What do you dislike about Slack?

can't think of anything i dislike about the product. i dont like how links get attached when you message them? not a big deal really. i think there are probably a lot of functions slack has that i don't know about.

What problems is Slack solving and how is that benefiting you?

Slack solves communication problems that arose during COVID. slack makes it so much easier to talk to your teammates, and the reactions make it feel more fun even when you're talking about work.

Enterprise (> 1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Slack"
What do you like best about Slack?

Messaging and the use of emojis / integrations with things like giphy

What do you dislike about Slack?

Nothing to dislike really, everything is nice

What problems is Slack solving and how is that benefiting you?

Communication with team while working remotely

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AC
Amy C.
Account Executive, Smb
Share
"Slack is great!"
What do you like best about Slack?

With Slack, I can reach out to a variety of people in my company and get answers quicker than email or support. My phone system integrates with Slack as well as SFDC.

What do you dislike about Slack?

The only thing I dislike is that I get a lot of notififcations and sometimes miss the ones from my post. If there was a way to modify the noise it would be helpful.

What problems is Slack solving and how is that benefiting you?

Finding answers quickly to customer problems and getting them resolved in a timely manner so I can continue selling.

Enterprise (> 1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
Richie N. avatar
Richie N.
Member
Share
"Collaboration at its Best"
What do you like best about Slack?

Very easy to use. Helps the team collaborate and has great intergrations that allow for good notifications.

What do you dislike about Slack?

I can't think of anything that isn't an admin function being blocked or controlled by my org.

What problems is Slack solving and how is that benefiting you?

Especially in a remote world, this helps us stay connected to our teams and team members.

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Slack is a perfect internal communications tool, with many amazing features."
What do you like best about Slack?

The Channels are great and well organized

What do you dislike about Slack?

The cost was always an issue for my company. But I think the tool makes it worth it.

What problems is Slack solving and how is that benefiting you?

Major gaps in communication have been closed.

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
SC
Shenkey C.
Project Coordinator
Share
"Communication channel to connect with Team"
What do you like best about Slack?

Slack is a communication & connecting tool used for chatting, calling & meetings to day to day life. It seems day by day slack is enhancing the features which are use full day to day life with most important is slack app support

What do you dislike about Slack?

Sometimes the call got hang while connecting Lags while sharing screen Auto disconnect feature for call needs to implement I have to disconnect call manually

What problems is Slack solving and how is that benefiting you?

Remove hurdles with day-to-day communication as our teamwork remotely & time zones as well. Apps in slack help synch outlook, gmail & many more to ease life We can connect JIRA, SFDC other used tools get updates in channel

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"Slack is the ultimate inter office communication tool"
What do you like best about Slack?

I like being connected no matter what device I am using. Whether it be a phone, tablet, or computer, I can keep in touch with my collegues.

What do you dislike about Slack?

When their service has an outage, it makes things hard. Or if they change their usage limits.

What problems is Slack solving and how is that benefiting you?

We get to stay connected whether we are out of the office or on the go. We can send and share files directly from any device we are using.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AG
Verified Reviewer
Founder
Share
"I love Slack!! Makes communication a lot easier!"
What do you like best about Slack?

The ability to communicate with my co-workers in groups/channels in a fast and more efficient manner than traditional email.

What do you dislike about Slack?

There is nothing I dislike about slack. I have used similar programs in the past with other companies, and slack has by far been my favorite.

What problems is Slack solving and how is that benefiting you?

The ability to communicate with my co-workers fast, rather than messages getting lost in an inbox. Helps when urgent issues arise!

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
AH
Adam H.
Founder
Share
"Great for in-office communications"
What do you like best about Slack?

Slack is easy to use and set up (once you get the hang of it) and it's convenient for in-office communications when email or calls may not always be best.

What do you dislike about Slack?

Slack is pretty robust and may take some time to learn how to use it effectively

What problems is Slack solving and how is that benefiting you?

Slack is used for office communications when email and calls are not convenient. Think of it as texting a group!

Small Business (50 or fewer emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
Shikhar S. avatar
Shikhar S.
Self Employed
Share
"slack for team"
What do you like best about Slack?

I can create a single team channel for the entire company, it helps me with project management.

What do you dislike about Slack?

Receiving Slack notifications throughout the day is a bit frustrating for me. There are numerous ways to notify you when you have one or more new messages.

What problems is Slack solving and how is that benefiting you?

It makes it easy to share and collaborate with someone in real-time. I can share something funny and offtopic with co-workers.

Mid Market (51-1000 emp.)
Dec 14, 2021
 Source
Overall Rating:
5.0
DV
Devan V.
Client Success Coordinator
Share
"Very happy User!"
What do you like best about Slack?

I like how this platform is easily set up for my company. We are able to make channels and add whomever we want to the channel to start a group with. It's also nice that you can have so many people on the platform.

What do you dislike about Slack?

If I had to give one cretic, it would be that at times, my notifications lag on appearing or I do not get alerted at all. That's just me being super nit-picky because the platform is truly wonderful!

What problems is Slack solving and how is that benefiting you?

Slack is a platform that brings together my whole company. We have many employees all over the world that we are easily able to connect with. We can also see if someone is out of office or sick or busy.