Whiteboards for Jira and Confluence are paid apps. The pricing is available on Atlassian Marketplace:

Your journey with Whiteboards will start from a 30-day evaluation, which gives you access to all premium features and support. 

Unlicensed installations / Freemium

It is possible to use Whiteboards without an active license. Your Whiteboards Freemium will start when:

What comes with Freemium?

Upgrade to Premium anytime to enjoy additional features: