Gmail
Gmail is a cloud-based and Google-supported free application developed to optimize your email experience. It uses advanced technologies in spam filtering to perfect the e-mail marketing process. With Gmail, you can keep your emails more organized and create templates to use in your email marketing campaign.
By integrating the forms and surveys you created on forms.app with your Gmail account, you can create e-mails with your form responses. So you can get a database for your email marketing operations.
You might also like

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

Google Sheets
Streamline your form responses to a Google Sheet and automate your work.NativeZapier

BigCommerce
Create a customer record, increase the possibility of selling to your potential customers.Zapier

SupportBee
Enjoy managing your support requests.Zapier