dbt Core is the software that takes a dbt project (
.yml files) and a command and then creates tables/views in your warehouse. dbt Core includes a command line interface (CLI) so that users can execute dbt commands using a terminal program. dbt Core is open source and free to use.
dbt Cloud is an application that helps teams use dbt. dbt Cloud provides a web-based IDE to develop dbt projects, a purpose-built scheduler, and a way to share dbt documentation with your team. dbt Cloud offers a number of features for free, as well as additional features in paid tiers (check out the pricing here).