Tableau Online is a hosted version of Tableau Server in the cloud. It is a secure, cloud-based solution for sharing, distributing, and collaborating on content created in Tableau. Tableau Online comes with a 14-day fully functional free trial period.
Tableau online is priced $500 per user, per year. All users who wish to log in to a specific Tableau Online site will need a license, regardless of whether they will be modifying any data or simply viewing the data.
Tableau Online allows connection to cloud databases like Amazon Redshift and Google BigQuery. It can automatically refresh data from web apps like Google Analytics and Salesforce or live query on-premises databases, or schedule extract refreshes.