Can I manage several client stores from one Tadow account?

You can track several Shopify stores under the same Tadow login, but each one runs as a separate workspace with its own subscription: there is no single dashboard that consolidates all brands today, nor pooled billing. In practice, you switch between workspaces depending on the client store, and invite your team with appropriate roles (admin, manager, read-only analyst) on each one. So it is multi-store management workspace by workspace, rather than one consolidated agency view.