There are three different types of pairing: Pairing with anyone, Pairing across groups, and Lottery. Here is an overview of how each Type works.

All three types operate similarly: set up a Donut channel and choose your pairing frequency. Once this is done, every Slack user in your specified Donut channel will be eligible to participate on every pairing date. Read on to learn about the differences in each type. 

Pair with anyone

With this option, every person in the Donut channel will receive an introduction to their match on Slack. The default is pairs, but you can choose up to groups of 8 people. If you are set to pairs and there is an odd number in the channel we will make one trio to ensure everyone is included. Donut uses a special algorithm to create matches that you can read more about here.

Pair across groups 

With this option you get to define 2 or more groups, such as Sales and Engineering, NYC Office and Dublin Office, or Mentor and Mentee. When participants join the Donut Slack channel, they will be asked to choose which group they belong to and will then will be paired with people who have selected a different group. With this option, everyone in the channel will be included each round. Read more about Pair across groups here.


This option allows you to only create a single pair or group each pairing round. This is setting is great for lunch lottery programs or CEO roulette where just a single group gets selected each time. You can choose the size of the group, and specify up to 2 people to always be included (e.g. cofounders, or an executive and their assistant). 

Did this answer your question?