What I like most about Slack is its intuitive interface and strong real-time communication. It makes team collaboration straightforward with well-organized channels, direct messages, and seamless file sharing. I also appreciate the wide range of integrations with productivity and project management tools, which helps keep workflows centralized. Features such as searchable message history, customizable notifications, and huddles further improve communication and support overall team productivity. Review collected by and hosted on G2.com.

Slack can feel overwhelming when there are too many active channels and constant notifications, and it becomes easy to miss important messages. The search feature is helpful overall, but in larger workspaces it can still be hard to quickly track down older conversations. Also, some of the more advanced features are restricted in the free version, and managing notification settings across multiple channels could be more intuitive and easier to control. Review collected by and hosted on G2.com.

Real-time, low-friction communication — much faster than email for day-to-day back-and-forth, with threads keeping conversations organized without inbox clutter.

Channels for organizing by topic/team/project — easy to separate signal from noise, join only what's relevant, and search history later.

Search — genuinely good at surfacing old messages, files, and links, which becomes more valuable the longer a team has used it.

Integrations/App ecosystem — huge range of bots and tools (calendars, CI/CD alerts, project trackers, etc.) that plug into channels, so Slack becomes a hub rather than just a chat app.

Huddles/quick calls — lightweight audio/video for spontaneous conversations without needing to schedule a full meeting.

Custom emoji/reactions and culture-building — small thing, but often cited as genuinely helping remote/hybrid teams feel more connected. Review collected by and hosted on G2.com.

Notification overload / always-on pressure — the real-time nature that makes it useful also creates an expectation of constant availability, which many people find exhausting or hard to disconnect from.

Message/channel sprawl — as teams grow, channels multiply fast, and important information gets buried or duplicated across threads and DMs.

Search isn't as good as it should be — despite being one of Slack's selling points, many users find that finding something from months ago (especially in a large workspace) can be hit or miss.

History limits on lower-tier plans — free/cheaper plans cap how far back you can search or view messages, which is a common pain point for smaller teams or those trying to save costs.

Threads can be clunky — replies in threads are easy to miss if you're not specifically watching that thread, so important context sometimes doesn't reach everyone who needs it.

Can become a substitute for documentation — decisions and knowledge end up "living" in Slack messages instead of a proper wiki/doc, making it hard to onboard new people or find canonical answers later.

App/integration clutter — a workspace with too many bots and integrations posting updates can end up as noisy as the email it was meant to replace. Review collected by and hosted on G2.com.

It's been one of those one platform that I got accustomed to pretty quick and now I cannot think using any other alternative even in my next org or agency. Review collected by and hosted on G2.com.

Everything I have disliked usually has a solution within Slack - for example, focus mode, VIP list, turning off unnecessary notification etc. Review collected by and hosted on G2.com.

What I like best about Slack is its ease of access and user-friendly interface. It can be used seamlessly on both desktop and mobile devices, making it easy to stay connected and respond to messages wherever I am. Similar to Discord, it offers organized channels, real-time communication, and engaging features that encourage collaboration and help teams stay connected and productive. Review collected by and hosted on G2.com.

Slack generally performs well and makes communication quick and convenient, but there are occasional instances where the platform lags or experiences delays. I also encountered an issue where I was unexpectedly logged out and unable to access my account, which temporarily disrupted my workflow.

When I experienced login issues, the support process relied on assistance from our administrator to restore access. While the issue was eventually resolved, having more self-service troubleshooting options could make the experience smoother for users facing similar problems. Review collected by and hosted on G2.com.

I like that Slack works on both mobile and laptop, which is super convenient. The communication is really easy, and I enjoy customizing the channels. It's great for having multiple departments in the same software, and it's really good for remote setups. The flexibility of Slack was a big plus since we switched from Microsoft Teams. The initial setup as a user was quite easy because I just had to download a mobile app or install it, and they have their own app so you can run it natively on your device. Review collected by and hosted on G2.com.

The things which don't work good for me on Slack is that sometimes it doesn't give proper notifications. Also, it's really hard to organize all the things at once. Review collected by and hosted on G2.com.

I use Slack for communicating with colleagues and appreciate how the Slackbot helps me work through customer cases quickly. The new Slackbot features allow me to get my job done more quickly by summarizing swarm threads, finding relevant posts, and suggesting next steps or solutions based on previous communications. I love the user interface; it's comfortable, easy to customize, and saves time by simplifying configurations. The additional features like Huddles save me from arranging Zoom meetings, which is a real time-saver. The initial setup was incredibly easy, as it was pre-installed on my MacBook, and I receive regular updates. Review collected by and hosted on G2.com.

Sometimes the notifications are a bit unreliable, so I miss communications sometimes. I would like all messages that are important and relevant to me to be 'pinged' at me as pop-ups and possibly go on to an answerboard, so all relevant messages can be seen on screen so I can go through them individually. Review collected by and hosted on G2.com.

What's kept me on Slack for years isn't any single feature, it's that it quietly becomes the searchable memory of a team. Threads keep side conversations from burying the main channel, and search is good enough that the answer to "why did we do it this way" from six months ago is usually one query away.

The second thing is how much of my actual workflow lives inside it without writing glue code: CI/CD results, monitoring alerts, and PR pings land in the right channel through webhooks and the App Directory, and Workflow Builder handles routine approvals and reminders without any engineering effort. For anyone doing on-call work, a dedicated incident channel with pinned status updates is one of the simplest, most effective ChatOps patterns out there, it doubles as a ready-made timeline when you sit down to write the postmortem.

What's made me more bullish on where it's headed: Slack recently rolled out a native MCP server, letting outside AI tools query workspace data through a standardized, permission-aware protocol instead of a pile of one-off integrations, plus real-time secret-scanning that flags an API key someone pastes into a channel before it turns into an incident. Small details, but they show the platform evolving with how engineering teams actually work now, not just chasing chat features. Review collected by and hosted on G2.com.

The free plan quietly undercuts the exact thing I praised. History and file visibility roll off after 90 days, and anything older than a year is deleted unless you've upgraded, so "searchable team memory" only holds up if you're paying for it or you've built your own export habit. The same free tier caps you at 10 third-party app installs, which bites fast once you're piping in CI/CD, monitoring, and a ticketing tool at the same time.

Second is scope creep. What used to be a very good chat app now also wants to be a workflow engine, a docs tool, a lightweight CRM via Salesforce channels, and a full AI agent that drafts messages and summarizes channels for you, and a lot of what makes it smart is limited to Business+, Enterprise+, or a separate AI add-on. None of these are bad individually, but tracking which capability lives on which plan has become its own chore. Slack

That AI point cuts both ways: Slackbot can already send messages, update your status, and take actions on channels on your behalf once you've approved it. Useful, but I'd want clearer after-the-fact visibility into what it did and why, not just a one-time permission prompt. And on Linux, the desktop client is still a heavy Electron app, noticeably more RAM-hungry than a messaging tool should be Review collected by and hosted on G2.com.

It’s easy to keep track of important conversations and organize day-to-day communication with company members.

I can’t imagine a workday without Slack.

There’s no shortage of connections, and the voice and video quality in Huddles is magnifique.

Although the price isn’t cheap, for a small-to-medium company it’s affordable for the value you get.

It offers a wide variety of integrations, and you can even create your own. It’s also very easy to use, with different ways to connect with the Slack backend.

I can’t really comment on support because I’ve never needed it. Everything works as it should, and it’s always been clear how to use it. Review collected by and hosted on G2.com.

If I have to say something… it’s owned by Salesforce. In my experience, when Salesforce takes over anything, it tends to become a pain in the ass and ends up super expensive. Review collected by and hosted on G2.com.

Using Slack day to day feels like juggling really good collaboration with some equally specific annoyances. On the good side, a lot of our team culture has grown around custom emojis, little graphics we've made that basically stand in for running jokes only we understand. When our Huddle calls turn into messy brainstorms, Slack Canvas is what I reach for to pull that mess into something that actually looks like a dashboard afterward. Search modifiers are another one I rely on constantly, things like during:march, has:link, or from:@user help me find decisions from years back in seconds instead of scrolling forever. And with sidebar nesting, I've been able to fold a bunch of unrelated channels into folders so my sidebar doesn't feel like chaos. Review collected by and hosted on G2.com.

Honestly the Huddle join sound gets me every time, that sharp ringing noise the second someone starts a call just breaks whatever focus I had going. There's also this quiet pressure around the green status dot, like people are watching whether you're active, so you end up clicking around just to look present. Threads are another pain point, they branch off into replies on replies until it's genuinely hard to figure out where a decision actually got made. Review collected by and hosted on G2.com.

Slack's performance over the past decade has consistently set a high bar. Its easy-to-access UI works without extensive tutorials, which is genuinely valuable, and it offers multiple day-to-day features that are intuitive and practical. Fast integrations with Okta, Jira, and Claude are very helpful and have become essential for routine workflows. The upcoming AI capabilities — such as summarising context and meetings, rephrasing content, and more — look particularly promising and useful. Ongoing support for understanding user intent, paired with features like screen sharing, audio and video calls, and maintaining thread continuity, further enhances collaboration and creates a positive impact. Together, these elements make Slack a reliable, productive tool for everyday team communication. Review collected by and hosted on G2.com.

During a video call, when screen sharing opens in full-window mode, I can’t quickly access the slack conversation from the desktop icon — trying to open it doesn’t bring up the chat. I have to minimise the shared screen and then open slack to view the chats. Review collected by and hosted on G2.com.