The Hubspot integration allows you to easily transfer any list from your HubSpot into your DeBounce account and validate them.
DeBounce is a verified partner of Hubspot. Find us here.
You can also use this integration to monitor HubSpot email lists on a daily basis using DeBounce list-monitoring (or sync) feature.
Here is the step-by-step guide on how to validate your HubSpot emails.