Block form and comment spam invisibly, without adding user friction.
Gravity Forms Spam Hexer is a free plugin that combines invisible proof-of-work protection with optional AI spam classification.
Features
- Invisible spam protection — stop bots with a background proof-of-work challenge that real users never see. No CAPTCHAs required.
- Optional AI classification — catch more sophisticated spam with AI-powered analysis that evaluates submissions in context and explains why they were flagged.
- Protect forms and comments — secure both Gravity Forms submissions and WordPress comments.
- Flexible spam handling — choose whether spam is flagged, silently rejected, or blocked with a validation error.
- Analytics and reporting — see exactly what was blocked and why with solve times, pass/fail rates, reason codes, AI latency, and AI usage tracking.
- Built for real-world sites — lightweight, cache-friendly, and designed to stop both simple bots and more advanced automated attacks.
We’ve been using it internally for some time, and through doing so have been able to end our Akismet subscription and deactivate Cloudflare Turnstile.
No CAPTCHA Required
Spam Hexer makes things hard for bots without adding friction for humans.
Before a submission is accepted, the browser must solve a small computational challenge behind the scenes. Most spambots can’t complete it, and those that can must pay a computing cost for every submission.
The result? Spam becomes expensive, while the experience remains invisible to legitimate visitors.
AI Spam Classification
When enabled, Spam Hexer uses AI to analyze submissions using context from your site, forms, and fields, helping identify spam that traditional defenses miss.
Connect via WordPress AI Connectors or OpenRouter and use the models you already have access to.
Built for Real Websites
- Skip spam checks for trusted, logged-in users.
- Protect forms and comments from one place.
- Track what’s blocked and why with detailed analytics.
A free plugin by Gravity Wiz.
We provide magically enhanced plugins, snippets, and tutorials for Gravity Forms.
- Legit Gravity Forms wizards.
We helped build Gravity Forms itself, and we’re certified developers. - Over 30,000 customers.
Thousands of Gravity Forms developers depend on our plugins to power countless client projects. - Save thousands of dollars in development costs.
Create custom, no-code solutions for your business from a growing list of 50+ plugins. - Access to hundreds of free snippets and plugins.
Customize Gravity Forms to your exact needs. We’ve written and released over 700 free snippets, and dozens of free Gravity Forms plugins. - Legendary support.
We’re here to help, and we mean it!
“Without Gravity Wiz, hundreds of hours of custom work would have needed to be done. I’m a member for life.”
– Robert Fisher, LeadCroc
Looking for functionality beyond Gravity Forms out-of-the-box?
Here’s an example of what some of our (nearly 50) plugins can do.
| Plugin | TLDR; |
|---|---|
| Nested Forms | Nest forms within forms, create Gravity Forms repeaters. |
| Populate Anything | Populate any Gravity Forms field or value dynamically from nearly any data source. |
| Google Sheets | Send and sync Gravity Forms data with Google Sheets. |
| Inventory | Manage Gravity Forms inventory for products, events, and appointments. |
| Entry Blocks | Display and edit Gravity Forms entries on the front end. |
| Notification Scheduler | Schedule Gravity Forms notifications to arrive whenever you want. |
| File Upload Pro | Enhance Gravity Forms file uploads with image previews, cropping, sorting. |
| QR Code | Generate QR codes from Gravity Forms field values, and scan QR codes to insert values into fields. |
Questions? Reach out to us.
