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Notes on form backends
Practical notes on form backends: spam filtering, server-side validation, routing submissions, and moving off the tools that charge per form.
Turnstile vs reCAPTCHA on a contact form
reCAPTCHA v2 makes real visitors click a box and sometimes name the bicycles. Turnstile drops the puzzle and verifies against Cloudflare instead of Google. Here is the quota, the friction and the spam neither of them stops.
What a form backend is, and how to choose one
A form backend is a hosted endpoint that receives your HTML form, validates it, blocks spam and delivers it where you want. Here is what each part does, and what to check before you pick one.