From their site:
“Stop writing form endpoints.
Collect submission data and track conversions with no backend coding required.”
Same success metrics Google Analytics gives you with less setup time.
Thank people who submit to your forms with personalized confirmation emails.
Your data is your data. Export it at any time in an easy to view format.
Display a single form on as many site pages as you want.
Forget about annoying spam emails. We filter them so you don’t have to.
Add a file upload field to your form and let people add attachments securely.
Send your form submitters to a custom success page or any other valid URL.
You can use Basin forms via AJAX, and they work cross origin by default.