This keeps the campaign focused on potential new subscribers and prevents welcome discounts from going to contacts you already have.
Turn on subscriber exclusion
Open the widget settings and go to Triggering → to To whom.
Turn on Exclude existing subscribers.
No other setup is required.
How Claspo recognizes existing subscribers
Claspo does not rely only on contacts collected through its own widgets. During each visit, it checks several signals already available on your website or in the link the visitor used to arrive.
If any supported signal shows that the visitor is already known, Claspo treats them as an existing subscriber and does not show the widget.
Here are the sources Claspo currently supports:
System or source | What Claspo checks |
Claspo | Previous submissions through Claspo widgets on your website |
Shopify | Whether the visitor has logged in to the store. Once detected, Claspo remembers this signal for later visits. |
UTM parameters | Recognized values in the |
ActiveCampaign | URL parameters in campaign links |
Beehiiv | URL parameters in campaign links |
Brevo (Sendinblue) | URL parameters in campaign links |
Customer.io | Identification data available through its JS API |
Dotdigital | Identification data available through its JS API |
GetResponse | URL parameters in campaign links |
HubSpot | URL parameters in campaign links |
Kit (ConvertKit) | URL parameters in campaign links and cookies |
Klaviyo | URL parameters in campaign links and cookies |
Mailchimp | URL parameters in campaign links and cookies |
MailPoet | Cookies |
Marketo | URL parameters in campaign links |
Omnisend | URL parameters in campaign links and cookies |
Segment | Identification data available through its JS API |
SendPulse | URL parameters in campaign links |
Tie / Revenue Roll | Identification data available through its JS API or Data Layer |
Unveild AI | Identification data available through its JS API |
You do not need to connect these ESPs, CDPs, or CRMs to Claspo. The feature uses the supported signals they already make available on your website or in campaign links.
Once Claspo recognizes a subscriber, it remembers this status for later visits in the same browser. Recognition therefore becomes more complete over time as new signals appear.
Subscriber status and visit history are two separate targeting options. To show a widget only to new or returning visitors, see New vs. returning visitors targeting.