MUTE them.
Blocks only automated AI and bot submissions to your contact form.
Real inquiries still get through. Free for up to 100 a month.
100 blocks/mo, free forever · No credit card
Is it really okay
to leave that risk alone?
You can't close your form —
but it's a target
You can't shut your contact form.
But convincing fake messages
and suspicious links come through it.
Filters set, but it's still
a never-ending battle
Add them to the blocklist, and AI rewrites the message a little and sends it again. You can't keep up.
Every morning starts with
sorting through spam
Email after email, it's all marketing...
Finding the real inquiries
takes way too long.
100 blocks/mo, free forever · No credit card
AI attacks and spam,
cleanly MUTED
Add one line of JavaScript to your contact form page and MUTE blocks automated AI and bot submissions before they reach your inbox — silently, in the background.
Your first step in security, for free.
MUTE works with a single line of JavaScript added to your contact form page. Once in place, it automatically detects and blocks bot-generated and AI-driven spam submissions in real time. Only genuine inquiries reach your inbox. Each month, a detailed report is delivered by email so you can see exactly how effective it's been.
How MUTE Blocks AI and Spam Bots
Block AI and spam bots — real inquiries always get through!
Protect your contact form
from AI attacks
Cyber attacks powered by AI are hitting small businesses too.
Your contact form is an easily overlooked entry point that delivers suspicious messages straight to your team.
MUTE blocks automated AI and bot submissions before they reach your inbox.
AI makes attacks
cheap and easy
Japan's national IT security agency (IPA) ranked "cyber risks surrounding the use of AI" #3 in its Top 10 Threats 2026 — its first appearance. Japan's National Police Agency warns that AI-automated attacks are likely to increase.
Contact forms slip past
spam filters
Messages from your contact form arrive from your own website, so spam filters rarely catch them. Microsoft has reported attackers abusing contact forms to deliver malware.
Don't just avoid it.
Never receive it.
The more natural AI-written text gets, the harder it is to spot by eye. MUTE doesn't judge the words — it tells whether a person or a program is sending, so suspicious messages never arrive.
* MUTE protects one entry point: your contact form. It is not a replacement for antivirus software or network security. Messages typed and sent by a real person are not blocked.
Sources: IPA, Top 10 Information Security Threats 2026 (Japanese) / National Police Agency of Japan, p.8 (Japanese) / Microsoft Security Blog (April 2021)
100 blocks/mo, free forever · No credit card
What changes when
you use MUTE?
100 blocks/mo, free forever · No credit card
How does MUTE compare
to other solutions?
| Feature | Email Filter | CAPTCHA System | MUTE |
|---|---|---|---|
| Setup effort | High | Medium | Low |
| Accuracy | Medium | Medium | High |
| Impact on users | None | Image puzzles & verification required | None |
| Cost | Free | Free up to limit, then pay-per-use | Free up to 100/month blocking pauses past 100 $3.00/month for unlimited |
| Results visibility | None | None | Monthly report |
| Maintenance | Manual | Manual | None |
※ CAPTCHA systems add friction to your visitors' experience and can become costly as traffic grows.
100 blocks/mo, free forever · No credit card
This is all you
need to do
MUTE only runs on domains that have been authenticated.
Complete domain registration and authentication here before pasting the code. If a domain has not been authenticated, the code will not block a single spam message.
Sign Up and Authenticate Your Domain
Enter your email address and the domain where you will use MUTE. Signing up authenticates the domain, which is what makes the code work. Done in about 2 minutes.
No credit card required
Paste One Line of Code
Copy the code from your dashboard and paste it on your contact form page. Takes about 5 minutes.
⚠️ Without domain authentication, pasting the code blocks nothing.
※ Your web developer can handle this too
See Results for Free
Check your dashboard for blocked counts. Watch as only real inquiries come through.
Keep Blocking for Free
MUTE blocks up to 100 submissions a month for free. Past 100, blocking pauses for the rest of the month and restarts automatically on the 1st.
Go Unlimited
if You Need It
$3.00/month (excl. tax) removes the limit — blocking never pauses.
Using WordPress?
Install in seconds.
MUTE Spam Blocker is available directly from the WordPress Plugin Directory.
No code required. Install, activate, and click "Start for free" in the MUTE menu —
spam blocking starts automatically.
One-click sign-up after activation. Open the MUTE menu in your WordPress admin, check your email address and site name, and click "Start for free". Blocking starts right away.
- ✅ Works with the major form plugins
- ✅ Also blocks automated AI and bot submissions (AI attacks)
- ✅ No CAPTCHA. No code. No configuration.
- ✅ Free for up to 100 blocks a month
- ⚠️ Past 100, blocking pauses until the 1st
- ✅ $3.00/month (excl. tax) removes the limit
Supported form plugins
- Contact Form 7
- Snow Monkey Forms
- MW WP Form
- Gravity Forms
- WPForms
- Ninja Forms
- Elementor Forms
- Forminator
- Fluent Forms
- Jetpack Forms
Pop-ups and multi-step forms are covered too.
Forms embedded via iframe (JotForm, Typeform) are not supported.
For Shopify stores,
install in minutes
Available on the Shopify App Store. No code needed.
Enable it from your theme settings and authenticate your domain with MUTE —
MUTE then blocks spam and sales messages in your contact form automatically.
Installing the app alone does nothing. Register and authenticate your domain with MUTE first. Blocking starts the moment authentication completes.
- ✅ Block spam emails, sales messages, and form spam
- ✅ Also blocks automated AI and bot submissions (AI attacks)
- ✅ No reCAPTCHA — enable from theme settings only
- ✅ Free for up to 100 blocks a month
- ⚠️ Past 100, blocking pauses until the 1st
- ✅ $3.00/month (excl. tax) removes the limit
Pricing
| Setup fee | $0 |
| Free plan | $0/mo, up to 100Pauses past 100, restarts on the 1st |
| Paid plan | $3.00/moUnlimited blocking |
Payment: Credit card via Stripe
* Prices exclude tax
100 blocks/mo, free forever · No credit card
Why people choose MUTE
Effortless Setup
Just paste one line of JavaScript. No technical expertise needed. Your web developer can handle it too.
Zero Friction for Visitors
No image puzzles, no CAPTCHA. Real visitors never notice a thing — only bots get stopped.
See the Results
Check your dashboard for live block counts. A monthly report lands in your inbox so you always know what's happening.
Use It with Confidence
Both cancelling your subscription (stop paying) and closing your account (stop using MUTE) take effect instantly from your dashboard. Multiple forms on the same domain? One account covers them all.
Built with security in mind
MUTE protects your contact form
with multiple layers of security.
Only AI and Bots React
MUTE adds a hidden field that real visitors never see — an invisible trap only automated AI and bot submissions fall into. No matter how natural the AI-written text is, it can be stopped if a program is sending it. Genuine inquiries from your visitors are never affected.
Encrypted Communication (SSL/TLS)
All communication is protected with industry-standard encryption. No risk of your data being intercepted or tampered with by third parties.
Passwordless Authentication
No password needed to log in. A one-time link sent to your registered email verifies your identity — eliminating the risk of password leaks by design.
Global Edge Network
MUTE's API runs on a globally distributed edge network. No single point of failure — ensuring high availability and consistent response times wherever you are.
Distributed Data Storage
User data is stored securely across geographically distributed data stores. Highly fault-tolerant with no single point of failure. If you close your account, your data is removed promptly.
Reliable Email Delivery
Monthly reports and authentication emails are sent via a dedicated, high-deliverability email infrastructure — designed to stay out of spam folders and reach you reliably.
FAQ
Not at all. Just paste one line of JavaScript on your contact form page. If you're not comfortable doing it yourself, ask your web developer or agency — it takes less than 5 minutes.
Yes. One account covers all forms under the same domain. Simply paste the same code on each page — MUTE manages them all from a single dashboard.
MUTE may not function correctly in the following environments. Please verify on the free plan before subscribing.
- Forms rendered dynamically after page transitions in SPAs (React, Vue, Next.js, etc.)
- Forms embedded inside iframes (Wix, Squarespace, etc.)
- Forms dynamically replaced by A/B testing tools
- Sites with strict Content Security Policy (CSP) settings — an additional rule may be required
Messages that AI or bots send to your contact form automatically are blocked. MUTE doesn't judge the content — it tells whether a person or a program is sending — so no matter how natural the AI-written text is, it can be stopped if a program is sending it. Keep in mind that MUTE protects your contact form only. Please combine it with other basics such as software updates and two-factor authentication.
No. MUTE only blocks automated submissions from bots. Any message submitted manually by a real person will always reach you without any issues.
MUTE blocks bot-generated spam with high accuracy. However, marketing emails submitted manually by a human are outside the scope of MUTE. Highly sophisticated bots are also not guaranteed to be caught 100% of the time.
MUTE uses passwordless authentication. Enter your registered email address on the login screen and a one-time login link will be sent to you. The link expires after 10 minutes.
No. MUTE never charges you automatically. Once you pass 100 blocks, blocking pauses for the rest of the month and restarts on the 1st. If you'd like unlimited blocking, you can subscribe from your dashboard.
Credit card payment via Stripe, billed monthly. We accept Visa, Mastercard, American Express, and JCB.
At the bottom of your dashboard there are two options.
"Cancel subscription" stops billing only and returns you to the free plan (up to 100 blocks a month). Blocking keeps working.
"Close account" ends your use of MUTE. Blocking stops, you can no longer log in, and all registration data is deleted - the same domain becomes available to register again.
Yes. Your data is protected and never shared with third parties. Security is our top priority — all communication is encrypted using industry-standard technology.
Still getting spam and AI-driven junk?
MUTE protects your contact form from spam emails and AI attacks.
100 blocks/mo, free forever · No credit card