Thank you for asking this.
As mentioned in our documentation we natively support 3 integrations (Stripe, Intercom, Mixpanel). Meaning that with a few lines of code, we handle the integration for you.
For others integrations - Front, Salesforce, Hubspot, and more - you’ll have to manually code your integration using our smart features: Smart Actions, Smart Collections, Smart Relationships and Smart Charts.
In our WOODSHOP, we provide a Hubspot integration example using smart collections and smart actions. Maybe this could help?