May 2026: Release Notes

New integrations

Send via HubSpot from Activate Flows. Three HubSpot actions are now available in the Activate Flows builder: send a transactional email, enroll contacts in an automation workflow, and sync contacts to a HubSpot list.

Salesforce Marketing Cloud: for orgs on use_subscriber_key_as_email, unknown contacts no longer drop out of syncs — sfmc_id is now populated from email.
Pinterest: audience and customer-list syncs keep running even when responses contain unknown fields, instead of failing the whole call.
Multi-channel campaign reporting: every action channel for a multi-channel campaign now shows up in query_syncs, not just the first.
Activate Flows is now generally available. You can now create and run Activate Flows that push segment membership and segment-driven messages to your channel destinations on a schedule. See Flows for the walkthrough.

Segments: zero-filter and multi-group segments deduplicate correctly in _main_select.
Salesforce: OAuth2 client-credentials webhook flow authenticates correctly again.
Journeys: processors no longer attempt to advance contacts through deactivated journeys. Paused-journey processors can also be cleanly abandoned without sending contacts to the journey exit.