Edge-native spam prevention

Stop spam. Build forms. No backend required.

Start free with our copy-paste pixel, or create secure hosted forms without writing any backend code. SpamBlock identifies spam using 13+ detection signals including language analysis, behavioral tracking, and advanced Unicode detection. Every submission is scored at the edge in under 50ms so your users never feel the friction.

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Average scoring latency: <50 ms
Spam blocked automatically: 92%
Disposable domains tracked: 130k+
Global edge locations: 285+

Add the SpamBlock Pixel

Paste one script, optionally tune advanced controls. No API keys or captchas required.

Minimal install

<script 
  src="https://pixel.spamblock.io/latest.js" 
  defer
></script>

Choose Your Path

Whether you have existing forms or want to build new ones, we have a solution for you.

Protect Existing Forms

For developers who already have forms

✓One script tag, works immediately
✓Free forever, 1000 checks/day
✓No account required
✓No analytics, no hosted forms

Get the Pixel →

Build Secure Forms Fast

For teams building new forms

✓No backend code needed
✓Secure, customizable forms
✓Analytics dashboard included
✓Free tier: 100 submissions/month, 3 forms

Start Building Forms →

Why teams choose SpamBlock

Our edge worker scores every submission in under 50ms using 13+ detection signals: language analysis, entropy detection, behavioral tracking, script analysis, and more. No captchas, no user friction, and analytics you can export.

Protect existing forms

Pixel solution: Drop in one script and protect all your existing forms. 13+ detection signals including language mismatch detection, entropy analysis, behavioral tracking, script detection, and homoglyph detection. Honeypots are injected automatically.

Build secure forms fast

Hosted forms: Create secure, customizable forms without writing any backend code. Keep your existing form actions and backend. SpamBlock intercepts submissions and only lets the clean ones through.

Scale with your team

Paid plans: SpamBlock surfaces scoring results in your logs so you can monitor false positives and automate follow-up workflows. Advanced analytics and team collaboration features.

How it works

Pixel Protection

Copy the script

Drop the script onto any page or template, or publish it globally with GTM or WordPress.

Paste into your site

Add the script tag to your HTML. No configuration needed for basic protection.

Forms are protected automatically

SpamBlock intercepts submissions, scores them, and only forwards clean requests to your backend.

Hosted Forms

Create an account (free)

Build forms in the dashboard

Use our visual form builder to create secure, customizable forms without writing code.

Embed or share form links

Get an embed code or shareable link to add your form anywhere.

View analytics and manage submissions

Monitor submissions, view analytics, and manage your forms from the dashboard.

Launch in minutes—no code rewrite required.

Protect existing forms with our pixel, or build new secure forms without backend code.

Get the Pixel Start Building Forms