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Slack vs Yammer: What are the differences?

What is Slack? Bring all your communication together in one place. Imagine all your team communication in one place, instantly searchable, available wherever you go. That’s Slack. All your messages. All your files. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. All together.

What is Yammer? Yammer is a Private Social Network for Your Company. Yammer brings the power of social networking to your company. Collaborate securely across departments, geographies, content and business applications.

Slack belongs to "Group Chat & Notifications" category of the tech stack, while Yammer can be primarily classified under "Enterprise Collaboration".

Some of the features offered by Slack are:

  • Create open channels for the projects, groups and topics that the whole team shares.
  • Search with context
  • Autocomplete makes mentioning your teammates quick and painless.

On the other hand, Yammer provides the following key features:

  • Accessing Yammer- Access Yammer from anywhere with an internet connection. Stay connected from your web browser, mobile device, or tablet. You can also view and interact with Yammer content within other business applications -- such as Sharepoint - using our API integrations.
  • People and Conversations- Whether your company spans seven cubicles or seven continents, Yammer helps your team collaborate on content, ask questions, share knowledge, and get work done.
  • Content Collaboration- Create, discuss, and share content with coworkers without sending a single email. Store large files, post documents to team workspaces, and collaboratively edit Pages in real time.

Airbnb, Dropbox, and Medium are some of the popular companies that use Slack, whereas Yammer is used by Yammer, Zopper, and Coach United. Slack has a broader approval, being mentioned in 4744 company stacks & 3361 developers stacks; compared to Yammer, which is listed in 11 company stacks and 6 developer stacks.

Advice on Slack and Yammer
Needs advice

From a StackShare Community member: “We’re about to start a chat group for our open source project (over 5K stars on GitHub) so we can let our community collaborate more closely. The obvious choice would be Slack (k8s and a ton of major projects use it), but we’ve seen Gitter (webpack uses it) for a lot of open source projects, Discord (Vue.js moved to them), and as of late I’m seeing Spectrum more and more often. Does anyone have experience with these or other alternatives? Is it even worth assessing all these options, or should we just go with Slack? Some things that are important to us: free, all the regular integrations (GitHub, Heroku, etc), mobile & desktop apps, and open source is of course a plus."

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Replies (4)
Arnaud Lemercier
Expert En Dveloppement Web Et Systmes Dinformations, Designer UX, UI, Co-grant at Wixiweb · | 4 upvotes · 115.8K views

We use Discord to tracking some action and errors (logs / alerting / assertion). it's free and simple to use with mobile application et notifications

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Rebecca Driscoll

We use Slack to increase productivity by simplifying communication and putting Slack in the middle of our communication workflow #Communications #Collaboration

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Michael Ionita

We use Slack because we can let "tools talk to us" and automate processes in our dev team using bots.

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Julien Tanay
Lead DevOps. Every day product hacker. at Dior · | 2 upvotes · 112.4K views

Our Discord Server is our n°1 community stop; we gather feedback from our users from here, discuss about new features, announce new releases, and so on.

We even use it for internal meetings and calls !

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Decisions about Slack and Yammer
Kamaldeep Singh

I still use slack, although I prefer discord. It can be intergrated with discord to work with clients who only want to use slack or even any other platform. API integrations are possible over at Discord.

The awful crappy dependency hell of a thing they call an API. Everything sucks. Slack is one of the worst messaging apps I have ever seen. It's incredibly slow and laggy.

Let me rant about everything I hate about slack. Even though I use it as an integration for another platform and will recommend it even though it's horrible as a whole. They are unstoppable towards companies who don't have people technically savvy enough to transition any other software.

It's so bad I am considering making my own mix of discord and slack.

Finding conversations you know you've had - but search is (Still) terrible, and if it was a direct message with a group of people, you have to remember exactly which group of people it was with

Search...absolutely awful. If they could figure out search, Slack would be unstoppable. it got better with ctrl f in conversations, but still isn't there

Badly arranged Chinese buffet of people, conversations, channels, files and links.. and search sucks too.. Break up the people into a separate window so I can have a buddy list ala Communicator or Skype. Give me some freaking organization and curation to the conversations - otherwise it's 1000 person cocktail party with everyone playing drinking games.

AGAIN! Search sucks. Spellcheck is still broken. Too many notifications.

Interface ist inconsistent between devices.

No way to forbid slack to touch my microphone settings (seriously, dont autoadjust my microphone level, it never works and i hate you so much for it)

Still no good screen sharing on linux.

The buggy red dot. Usually shift-esc will clear it (in itself a pain), but now even that hack won't help. The red dot number keep climbing even though I've read everything and used shift-esc.

I miss some features but I wish slack had a little more ability to organize, group channels, and navigate a little better.

user groups need work... If I search for a group, open it, I want to be able to not just see who is online from that group, but also a message button. I'm sick of searching that person, which closes user groups and if that person is actually AFK, I have to search for that group AGAIN and do it again... What a waste of time compared to other tools which are supporting this.

Date stamps needs to be more visible, or give us option in settings to make it more/less visible

Scrolling needs to be improved, I don't want random jumps there. Especially when time and date stamps are so tiny so it takes a while to get oriented again.

I used to really hate slack, but that's mostly because I have to use user groups a lot, most of the time I'm using slack it's to find someone who belongs to some group and message him... and that stuff is still pretty bad, even tho it was changed a bit...

oh and microphone settings... that hurts bad...

It's slow and laggy if you ever used a native program and got used to responsive user interfaces.

You can't remove someone from a call if they join by mistake

(or, to put it another way, if you start a channel call, you should be able to moderate it and remove those from it who are to meant to be there)

Video calls (using the "native" app on macOS) consume so much resources that the whole machine becomes unresponsive. A video call with the same number of people in a true native app is not a problem. So it's not the inherent bandwidth and processing power required. I mostly like Slack but for remote teams this is a problem.

You really want to know what I hate about SLACK...

The inability for the app to BLOCK DIRECT MESSAGING when outside work hours... I work for global company and I constantly get messaged after midnight by morons who think i am up at 3am

It has this Bullcrap Send Anyway function on messages which totally overrides my Do Not Disturb settings if said moron is blind of what time they are sending their damn message... I worked oncall before so the slightest him of my cell at night will wake me up...

Another annoyance on messaging... Idiots who message direct over chatting in the team channel for stuff that should be seen by the whole team working a ticket .... Or classic hey I opened a ticket not two minutes ago ' can someone look at this ticket pleaee' blah blah blah blah ... People who I don't know sending a random 'HI' and no other info about wtfh they are reaching out to me about ...

If SLACK wants to add a function to fix this I want control to block direct messages from anyone truly outside my direct team and line of management that is not a member of a group that can engage onCalls for issues ... I am so sick and tired of this I literally have to uninstall the app everyday to ensure no one bothers me after I am off work and then redownload it before the start of the next day... It's pathetic!

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As it is the communication tool chosen for the course, our team will be using Slack to monitor the course announcements from our instructor as well as to communicate with the instructor and industry partners. The tool for communicating within the team will be Microsoft Teams. Microsoft Teams enables the team to share documents and edit them synchronously(Google Drive is not an option due to one team member's location). Since it also provides a group chat feature, we chose to use it as our communication tool to avoid using too many softwares.

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Hirotaka Ishihara
Undergrad at University of Toronto · | 2 upvotes · 68.7K views

Communication We have chosen two tools for our team communication.

  • Slack

We choose Slack since all of us are familiar with this communication tool. We have a private channel for our team Sphinx for text messages. We added Github apps inside our private channel for repo update notifications. Furthermore, we could contact the subject matter experts within the workspace DCSIL directly for the issues we meet.

  • Microsoft Teams

We use Microsoft Teams for virtual meetings for its fast connection speed. In addition, the call feature in Slack is a paid feature, and we could have virtual meetings and share screens for free in Microsoft Teams.

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Pros of Slack
Pros of Yammer
  • 1.2K
    Easy to integrate with
  • 877
    Excellent interface on multiple platforms
  • 848
  • 694
    Mobile friendly
  • 690
    People really enjoy using it
  • 330
    Great integrations
  • 315
    Flexible notification preferences
  • 197
    Unlimited users
  • 184
    Strong search and data archiving
  • 155
    Multi domain switching support
  • 80
    Easy to use
  • 40
  • 27
    Hubot support
  • 22
    Unread/read control
  • 21
  • 19
    Permalink for each messages
  • 17
    Text snippet with highlighting
  • 15
    Quote message easily
  • 14
    Per-room notification
  • 13
    Awesome integration support
  • 12
    IRC gateway
  • 12
    Star for each message / attached files
  • 11
    Good communication within a team
  • 11
    Dropbox Integration
  • 10
    Jira Integration
  • 10
    Slick, search is great
  • 9
    New Relic Integration
  • 8
    Great communication tool
  • 8
    Combine All Services Quickly
  • 8
    Asana Integration
  • 7
  • 7
    This tool understands developers
  • 7
    Google Drive Integration
  • 6
    Replaces email
  • 6
    BitBucket integration
  • 6
    XMPP gateway
  • 6
    Twitter Integration
  • 6
    Google Docs Integration
  • 5
    GREAT Customer Support / Quick Response to Feedback
  • 5
    Jenkins Integration
  • 5
    Guest and Restricted user control
  • 4
    Gathers all my communications in one place
  • 4
    Excellent multi platform internal communication tool
  • 4
    GitHub integration
  • 4
    Mention list view
  • 3
    Easy to start working with
  • 3
    Visual Studio Integration
  • 3
    Perfect implementation of chat + integrations
  • 3
  • 3
    Easy to add a reaction
  • 3
    Clean UI
  • 3
    Timely while non intrusive
  • 3
    Great on-boarding
  • 3
    Threaded chat
  • 2
    Intuitive, easy to use, great integrations
  • 2
  • 2
    Great interface
  • 2
    So much better than email
  • 2
    Message Actions
  • 2
    Great Channel Customization
  • 2
    It's basically an improved (although closed) IRC
  • 2
    Eases collaboration for geographically dispersed teams
  • 2
    Android app
  • 1
    Great API
  • 1
    Very customizable
  • 1
  • 1
    Easy remote communication
  • 1
    Get less busy
  • 1
    Targetprocess integration
  • 1
    Better User Experience
  • 1
    Finally with terrible "threading"—I miss Flowdock
  • 1
    Archive Importing
  • 1
    Great Support Team
  • 1
    Complete with plenty of Electron BLOAT
  • 1
  • 1
    Multi work-space support
  • 1
    Flexible and Accessible
  • 1
    Travis CI integration
  • 1
    It's the coolest IM ever
  • 1
    I was 666 star :D
  • 1
  • 1
    Dev communication Made Easy
  • 1
    Integrates with just about everything
  • 0
    Easy to useL
  • 0
  • 0
    By microsoft

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Cons of Slack
Cons of Yammer
  • 12
    Can be distracting depending on how you use it
  • 6
    Requires some management for large teams
  • 5
    Limit messages history
  • 4
    Too expensive
  • 4
    You don't really own your messages
  • 3
    Too many notifications by default
    Be the first to leave a con

    Sign up to add or upvote consMake informed product decisions

    What is Slack?

    Imagine all your team communication in one place, instantly searchable, available wherever you go. That’s Slack. All your messages. All your files. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. All together.

    What is Yammer?

    Yammer brings the power of social networking to your company. Collaborate securely across departments, geographies, content and business applications.

    Need advice about which tool to choose?Ask the StackShare community!

    Jobs that mention Slack and Yammer as a desired skillset
    What companies use Slack?
    What companies use Yammer?
    See which teams inside your own company are using Slack or Yammer.
    Sign up for Private StackShareLearn More

    Sign up to get full access to all the companiesMake informed product decisions

    What tools integrate with Slack?
    What tools integrate with Yammer?

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    Blog Posts

    Sep 29 2020 at 7:36PM


    What are some alternatives to Slack and Yammer?
    Microsoft Teams
    See content and chat history anytime, including team chats with Skype that are visible to the whole team. Private group chats are available for smaller group conversations.
    Discord is a modern free voice & text chat app for groups of gamers. Our resilient Erlang backend running on the cloud has built in DDoS protection with automatic server failover.
    Trello is a collaboration tool that organizes your projects into boards. In one glance, Trello tells you what's being worked on, who's working on what, and where something is in a process.
    Skype’s text, voice and video make it simple to share experiences with the people that matter to you, wherever they are.
    Asana is the easiest way for teams to track their work. From tasks and projects to conversations and dashboards, Asana enables teams to move work from start to finish--and get results. Available at and on iOS & Android.
    See all alternatives
    Reviews of Slack and Yammer
    Review of

    Today the impossible happened, our beloved Slack crashed sending chaos into offices around the globe. “Wow, how am I now going to vote for the flavour of our new office candy???”, I thought. But even though it might not have felt like it, everything else around us was still working: the world was still spinning, South Korea was winning over Germany at the World Cup, and today’s quotas and goals had to be met. In these situations, people most often turn towards traditional messaging tools like messenger, WhatsApp or email and hope for the best — that Slack will be back up soon. However, these temporary remedies are not without their complications: undelivered messages that you thought were read, lost documents, mental breakdowns, wasted time, etc.… In general, for us it creates a problematic gap in our office chat history.

    But what if I told you that these crashes could potentially never occur again?

    Yes, this is real life, and it’s exactly what mesh technology is about so we are going to explain it. In this scenario, if Slack ran with mesh networks, its users would not have been affected by its current technology’s single point of failure, which in this case was the crash of the server.

    Lol okay, how is this possible bc this is real life???

    Mesh networks might not sound familiar to everyone so let’s compare it with other well-known networking topologies. Consider a Local Area Network (LAN), where devices are connected to a central access point (imagine it like a star with the central access point in the middle and the devices located at the ends). Be it LAN or wifi, the idea is the same, so when I send a message on Slack, it first arrives at the Slack server (the central access point) and from there it is sent to the recipient.

    In mesh networks, devices are directly connected to each other. They form a local network using existing connectivity technologies such as Bluetooth or Wi-Fi as “connectors”. Devices can act as “routers” and forward messages and files to others, enabling the content to hop between them until it reaches a destination. This eliminates the need for a central entity.

    Let’s apply this concept to today’s crisis. If slack ran on top of mesh networks, their consumers would still be able to communicate and send files even though they were not connected to the crashed server. Once it was up and running again, all their group conversations which would have taken place during the outrage would be uploaded back to Slack’s server once they were back online.

    Honestly, it’s that simple. To Slack, it would not only be convenient for its customers in situations like these (because we would never have Slack crashes), it would also considerably reduce their own infrastructure costs and prevent them from having moments that they might find embarrassing.

    So slack, if you see that mesh networks could potentially help you, come talk to us.


    Senior Software Engineer
    Review of

    Slack is gorgeous and runs on multiple platforms - that's benefit #1. You can easily talk on your iMac then switch to your Android device on the fly.

    The one thing I don't really like about it is how it handles multiple organization accounts.

    I am a software consultant so I typically work with multiple teams over the months and it's odd to 'log into the right account'. It's not intuitive at all.

    I would like there to be a way for users to easily pick a 'Persona' and not accidentally post to the wrong company.

    Review of

    Slack filled a very complicated role and did it elegantly.

    Its very well designed and easy to use. Adding integrations can be complicated but their documentation with images makes it very easy.

    Also I contacted support and get a relevant answer quickly!

    All this on the free plan, you better bet we will be upgrading soon.

    Product Manager at StackShare
    Review of

    Internal Communications made easy

    How developers use Slack and Yammer
    StackShare uses

    I first heard about Slack from my friend Matt (shout out to Final!). He was helping me out with some Rails issues so we started using Slack and I liked it. Specifically, the chat interaction. But also all the integrations. I wasn’t thinking of it as a tool to end all tools at first, just a chat tool with some cool integrations. Then I created a Slack account for StackShare, and that’s when things got real.

    Sentry got easier to stay on top of, Heroku was easier to see activity from, discussions were more fluid, and the mobile app was killer. Most of the tools I use either don’t have a mobile app or have shitty ones. Slack is like a replacement for all the mobile apps my tools should have.

    I don’t find Slack particularly useful for focused discussions, so I doubt it will replace email anytime soon for us. Things like product discussions/debates are best via email. It forces you to think before you type and have a clear back and forth with someone.

    Small gripe: I wish Slack would disable email notifications by default, I still haven’t figured out how to turn those off.

    shridhardalavi uses

    Slack is an instant messaging and collaboration system It unifies your entire team communications, making your workflow, well, flow a lot better. It is a cloud-based set of proprietary team collaboration tools and services. Slack teams allow communities, groups, or teams to join through a specific URL or invitation sent by a team admin or owner.

    SaberEsPoder uses

    Slack is our go-to communication tool and it's slowly replacing emails across all departments of the company. We built our own Slack Bot to help us with simple DevOps stuff; Honeybadger notifies us in real time of errors happening on production in our monitoring channel; CircleCI reports builds status and deployment info as well.

    Andrew Gatenby uses

    Team comms is essential. The R&D team is distributed over two offices, as well as the chance that people are working from home. Slack provides lots of options of keeping individuals and groups up to date. We also use it to integrate into services such as Github and Sentry.

    Refractal uses

    Slack is a lifesaver, not only for our day to day team communications and it's direct links into our other tools, but for Beta testing as well, with our custom Slack bot in our beta group being an invaluable asset to avoid giving our testers direct JIRA access.