If you switched from Teams to Slack tomorrow, or vice versa, you'd spend maybe two days figuring out where everything lives. After that, you'd realize you're doing the exact same things in almost exactly the same ways.
That wasn't always true. A few years back, these products felt genuinely different. Slack felt like the cool, agile thing built by people who understood how actual teams communicated. Teams felt like the enterprise thing Microsoft bolted onto Office 365 because they needed something in that space. The differences mattered. You could feel them.
But something shifted. It's subtle enough that nobody's really talking about it, which is partly why it's interesting.
Look at what both platforms do now. You've got channels. You've got threads that live within those channels. You've got direct messages and group DMs. You've got search that's decent but not great. You've got integrations that let you pull data from other tools. You've got notifications that you'll probably hate no matter what settings you choose. You've got mobile apps that feel like pale shadows of the desktop experience. You've got the ability to pin things, star things, react with emoji, edit messages after you send them.
Neither one is pushing into wild new territory anymore. Teams isn't trying to be something revolutionary. Slack isn't either. They're both optimizing around the same basic assumption: workplace chat is a solved problem, and what matters now is making sure your specific implementation of it is slightly more polished than the other guy's.
There's a version of this story where you'd say they converged because one of them copied the other, and there's probably some truth to that. But mostly it seems like they both looked at how people were actually using workplace chat and built toward that, which means they naturally ended up in roughly the same place. The convergence is less about copying and more about gravitating toward the same center of gravity.
The real difference now is stuff that barely matters to most people. Teams is cheaper if you're already in the Microsoft ecosystem. Slack feels slightly snappier on some machines. Teams integrates seamlessly with Office documents in a way Slack doesn't. Slack's app experience is marginally less buggy. These are real differences, but they're the kind of differences that determine which product wins a contract, not which one feels fundamentally better.
Where it gets interesting is what this means for the market. For years, the story was about competition between these two. Who's winning? Who's growing faster? Is Slack vulnerable? Is Teams actually good or just inevitable because of its bundling? But if they're genuinely converging on the same product category, then the real question becomes whether anyone actually needs two of them anymore. Maybe the more relevant story is that workplace chat has matured into a commodity feature. You pick one, it works, you move on.
Or maybe that's too neat. Maybe the differences that seem small now will start to matter in ways we're not seeing yet. Maybe AI integration will splinter them apart again. Maybe one company will get bored and try to reinvent their product in some direction we're not expecting.
But right now, today, if someone asked whether they should move from Teams to Slack or stay put, the honest answer is probably: it won't change much. They've become interestingly, quietly equivalent. Not identical. Just... starting to feel like the same choice made two different ways.