You can sync prompt response to create/update Omnisend contact.
Connect to Omnisend
Go to prompt connections page and connect to your Omnisend account. Omnisend contact sync option will only be shown to accounts that are connected to Omnisend.
Omnisend Contact Sync
Edit prompt and select
Sync. Then locate
Omnisend Contact and turn it on.
All other configurations and fields are optional.