Can I create both contacts and companies in HubSpot from Clay in a single enrichment?

You can't create both contacts and companies in a single enrichment, but you can set up an automated workflow sequence. First, use HubSpot "Lookup object" actions to check if companies and contacts already exist (using domain and email as identifiers). Then use HubSpot "Create object" actions - create companies first, then contacts. Finally, use "Create association" to link contacts to their companies using the company IDs. The complete workflow becomes: lookup → create (if needed) → associate. Run a 10-row test first to verify the workflow works before processing your full dataset.