Dev.to
6/24/2026

How we connected off-page content to actual revenue with a small Calendly to HubSpot webhook
Short summary
A SaaS company solved broken attribution tracking by combining strict UTM naming, a Calendly webhook that captures booking data, and a Python handler syncing UTMs to HubSpot. This simple approach revealed which off-page channels (Reddit, Medium, podcasts) actually generated revenue, including an unexpected source: AI assistants citing their content. The key lessons: enforce conventions consistently and ensure webhooks fire reliably on every event.
- •Strict UTM convention enforced in CI prevents bad data at the source
- •Calendly webhook on invitee.created captures and forwards tracking to HubSpot
- •Revealed that AI assistants citing content became a major demo-booking source
Generated with AI, which can make mistakes.
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