> ## Documentation Index
> Fetch the complete documentation index at: https://plain-docs-orca-916-agent-docs-restructure.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Companies

> Companies group customers by email domain. Plain infers them automatically, and you can set them yourself.

Within Plain every customer can belong to one company. The company is inferred automatically using the customer's email address. For example if their email address ends with "@nike.com" then their company will be automatically set to "Nike".

<Snippet file="graphql/sdk-note.mdx" />

Companies allow you to prioritize and filter your threads.

Additionally [tiers and SLAs](/product/platform/tiers) can be associated with a company.

<Snippet file="shared/tenants-vs-teams.mdx" />