Upgrade your entire organization if you want admins for your company and paid features for all teams.
An organization contains every Asana user from your company who shares your company email address - these are organization members. In an organization you can create multiple teams which are groups of organization members and/or guests. Guests do not count towards your organization’s seat limit. Within teams you can create projects for the people in that team to work on.
Based on your needs, you can choose which of these spaces you would like to upgrade to our Premium, Business or Enterprise tiers. You can upgrade the entire organization so that every team benefits from paid features, or you can choose to upgrade a single team with a team plan. You can even upgrade a specific group of teams under one subscription with a division plan. Individual team upgrades or division plans are usually the best option for teams in large companies.
You will find a more detailed overview of each plan type and the main differences here.