GetResponse
GetResponse is an email marketing automation platform that helps build email lists, autoresponders, and email analytics. With GetResponse, you can bring your business online and grow your customer base. It is also possible to increase online sales by interacting with customers.
forms.app integrates with GetResponse so you can create new leads and update them instantly. Thus, you can create a customized routine for your business and closely monitor your e-mail campaigns.
You might also like

Crowlingo
Use your form and survey responses as data sources and report them.Zapier

Jitbit Helpdesk
Create a user profile and send customer support emails automatically.Zapier

HubSpot CRM
Connect your forms to HubSpot and automatize your processesNativeZapier

Front
Streamline new contacts to your emailing list from your form responses and automate your work.Zapier