The best way to handle marketing attributions for inbound Chatflow leads is to use HubSpot’s ads tool and the five different models of attribution, such as contact attribution and deal attribution, which are tracked by the HubSpot tracking code installed on the page the ad directs visitors to.
Not sure this works but you can try setting up a workflow can be set up to capture the ‘Chatting From:’ value that populates on the Chatflow and attribute the lead source to an object record: Ads attribution in HubSpot
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