Yes to integrations, that is the point of a system. Your existing CRM stays if you have one: HubSpot syncs natively with Salesforce and others. On the execution layer we plug in best-of-breed modules: Clay and Apollo for data and enrichment, Instantly and HeyReach for outreach, visitor identification and intent feeds, Stripe, QuickBooks, and your ERP for revenue truth. Every license is registered in your name and swappable. The full current stack is published on the Revenue Loop page.