Sendinblue
Sendinblue is an email marketing tool with which you can create marketing automation and email campaigns for your business. You can easily increase your sales thanks to the automatic e-mails you will send to your users and the abandoned cart reminder feature.
Thanks to the integration of forms.app and Sendinblue via Zapier, you can create subscriber registration by adding user data and sending an e-mail from your Sendinblue account.
You might also like

Sendoso
Create a customer or product profile for your website.Zapier

Smartsheet
Open worksheet, attach files and share via email.Zapier

WordPress
Connect your form responses to your WordPress and register people to your website.Zapier

Clio
Create a person or company contact and get all the information in one place.Zapier