[zubspace]

We're a small team of a bit more than 10 people and slack has definitely improved our lifes. It's easy to use, has lots of integrations, looks good, is free to use without the unlimited archiving of messages and works on desktop an mobile. Everyone can use it, developers, marketeers and managers alike.

Before there was always someone moving around to talk to someone else or internal E-Mails which are bad, too.

We use slack sparingly and only have a few channels with many people. Most things happen in private channels. We always "idle-ping" other team members first and do not expect an immediate response.

The result is a much calmer office. People move around less and there is less chatter. And we still have the option to use group chat if required.

We even added a channel where new commit messages are automatically posted. A wonderful thing to keep informed about what's going on and you can take immediate action if you see something strange.

I think this all falls apart if our team size would increase. But I believe for teams with less than 25 people slack is perfectly fine. Above that size notifications probably start to be annoying.