# Slack

> A chat app for work, organized in channels instead of endless email threads.

- Level: Basic
- Topics: Tech companies, Software
- URL: https://tidbit.legios.com.ar/slack/
- In Spanish: [Slack](https://tidbit.legios.com.ar/es/slack/)

**Slack** is a messaging app for teams. Instead of long email chains, conversations happen in channels named by topic or project, such as `#design`, `#sales` or `#incidents`, that anyone on the team can join, search and catch up on later. There are also direct messages, threads to keep side discussions tidy, quick voice and video calls, and file sharing.

It was born by accident. Stewart Butterfield's company was building an online game called Glitch and, to coordinate, the team had made an internal chat tool. The game failed, but the tool looked promising, and it launched as Slack in 2014. It spread fast among tech companies, partly because it was free to start and easy to try with a small team.

A big part of Slack's appeal is integrations. Other tools can post into channels: a build failing, a new sale, a server alert, a calendar reminder. Bots and AI assistants can answer questions there too. Salesforce bought Slack in a deal completed in 2021, and its main rival today is Microsoft Teams, which comes bundled with Microsoft 365.

## An analogy

An office where each project has its own room with the door open. You walk into the rooms you care about, read what was said while you were away, and nobody has to forward you anything.

## Keep in mind

- Conversations are organized in channels by topic, plus direct messages.
- Came out of an internal tool built for a game that failed.
- Integrations and bots post alerts and updates into channels.
- Owned by Salesforce since 2021; main rival is Microsoft Teams.

## Go deeper

- [Slack (official site)](https://slack.com/)
- [Slack (software) on Wikipedia](https://en.wikipedia.org/wiki/Slack_(software))

## Related terms

- [Cores and threads](https://tidbit.legios.com.ar/cpu-cores-and-threads/): Why a CPU is really several processors, and why it can juggle even more tasks.
- [Server](https://tidbit.legios.com.ar/server/): A computer whose job is to answer requests from other computers, all day, every day.
- [Artificial intelligence](https://tidbit.legios.com.ar/artificial-intelligence/): Getting computers to do things that, until recently, only people could do.
- [Salesforce](https://tidbit.legios.com.ar/salesforce/): The company that sells, as an online subscription, the software to manage customers.
- [Microsoft](https://tidbit.legios.com.ar/microsoft/): The company of Windows and Office, now just as much a cloud company with Azure.