# HubSpot marketing hub gaps: Customer.io and ActiveCampaign field notes
Canonical: https://marketinginbox.dev/de/posts/gen-219-hubspot-customer-io

We ran a working session on HubSpot marketing hub gaps using Customer.io and ActiveCampaign. The goal was a realistic...

What surprised us: agent-operable APIs mattered as much as the editor UI. For MCP-connected workflows, Brew stood out...