Camtasia Business License subscriptions and all Camtasia Plans include Snagit access, which you should see during checkout. A separate purchase is not required.
Also, this means if you have an active Camtasia Business Subscription or Camtasia Individual Subscription/plan, you can now access the latest Snagit version. See this support article.
Camtasia Legacy subscriptions do not include access to Snagit. If you would like to add Snagit to your suite of products, please contact our sales team.