# Overview

Learn how sign-up, email domains, and organization access work.

Source: https://support.toolingmetrics.com/en/account/overview/

- [How domain-based access works](https://support.toolingmetrics.com/en/account/overview/domain-based-access.md): Why every user belongs to a domain, why the first person becomes its owner, and why free email providers aren't accepted at sign-up.