> ## Documentation Index > Fetch the complete documentation index at: https://plain-mattvagni-patch-1.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Companies Within Plain every customer can belong to one company. The company is infered 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". Companies allow you to prioritise and filter your support requests. Additionally [tiers and SLAs](/tiers/) can be associated with a company.