Which one? site plan or account plan?

Hi! I’m learning to design two websites with different functions, landing pages (basic information) and websites to display updated-database via form. Which plan is the most suitable? Account plan or site plan?

Depends on what you want to do. You have a site limit in a free account unless you pay for hosting which would make any hosted sites not count toward the limit. Currently you can have 2 projects on a free account so if you only need two sites and you don’t need custom domain hosting, you can use Webflow for free.