Free organization with one free and one premium account?

I am a fairly new user of Bitwarden but from what I have experienced so far I expect I will be staying for a long time.

I have been trying to find out if the Free Organization for two accounts is dependent on both accounts being either free or premium, and if upgrading one account excludes either account from being in the same Organization. Does the account level matter?

You can definitely have a mix! Items in the Free organization won’t have the premium features like TOTP generation or attachments, and of course the free account won’t have those features either. But - all the items in the paid vault will behave as a premium account would normally.

Perfect, thanks! And thank you for supplying additional info!