A complete form backend, without the backend.
formbuild.io gives any form a secure submission endpoint. Add it to an HTML form, React or Next.js app, static site, or an AI-generated website, and receive submissions by email, Slack, Discord, or webhook — no backend to build.
One submission endpoint
Point any form at a single URL. Works with a plain HTML action or a fetch() call — no SDK required.
Instant notifications
Get an email the moment a form is submitted. Route to Slack or Discord on every plan, with generic webhooks and additional channels on Pro.
Spam protection
Every response is scored automatically on every plan — clear spam is filtered and never counts toward your limit. Cloudflare Turnstile is available on any plan; honeypot, sensitivity, and allow/deny rules are Pro.
Validation
Server-side validation with clear error responses, so bad or malicious input never reaches your inbox.
Webhooks with signatures
Forward submissions to your own endpoint with a signed payload you can verify (Pro).
Team access
Share forms and submissions with up to 5 teammates (Pro).
Notifications
Free plans get Email and In-dashboard and Slack and Discord notifications. Pro adds Microsoft Teams, Telegram, Webhooks, Digests.
Spam protection
Every response is scored on submit — link count, disposable addresses, duplicate content, submit timing, and known spam phrases. Clear spam is filtered automatically on every plan and never counts toward your monthly limit; borderline responses wait in a Review tab. An optional Cloudflare Turnstile challenge is available on any plan. Honeypot fields, custom rate limits, sensitivity control, allow/deny rules, and reCAPTCHA are Pro.
File uploads
Multipart submissions are accepted and text fields are stored. Binary file storage is not yet supported — file parts are ignored.