You don't need a backend to store form submissions. You need a place to ask "how many."

Originally published at works, but the point isn't the tool — it's refusing to let your form data land somewhere you can't ask it anything. The honest caveat that applies to any version of this: the public read widget isn't a write endpoint, so capture still goes through a key the browser never sees, and email delivery plus spam filtering stay your front-end's and your ESP's job. Storage isn't the hard part. Not being able to ask your own data a question is.