Invisible Anti-Spam & CAPTCHA — WordPress Anti-Spam Plugin
Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
by Matthias Nordwig · WordPress.org page · Website
Invisible Anti-Spam & CAPTCHA has 4,000+ active installs on WordPress.org and 79,184 downloads all time. We have tracked it since September 4, 2026; download trends appear after 30 days of data. The last update was on August 24, 2026, tested up to WordPress 7.0.4.
Invisible Anti-Spam & CAPTCHA at a glance
Is Invisible Anti-Spam & CAPTCHA well maintained?
Features
The feature list from the plugin's own readme on WordPress.org, trimmed to the essentials.
- Invisible — zero user interaction, ever
- Protects everything: logins, registrations, comments, WooCommerce, every form builder — even hand-coded custom forms
- No account, no API keys, no external services — install and you are done
- Brute-force protection for logins, with optional Fail2Ban log support
- Adaptive under-attack mode: the challenge automatically gets harder for everyone while a spam wave is running, and relaxes afterwards
- Your choice per site: block spam, deliver it flagged, or just collect it in a spam inbox and watch
- Teach it live: unrecognized custom form? Direct analysis mode adds it with one click, straight from the live page
- Lightweight: a few KB of JavaScript, no render-blocking, no layout shift
- Privacy-friendly by design: no cookies, no sessions, no tracking, no data leaves your server, IP addresses are only stored as hashes — GDPR/DSGVO/RGPD-friendly…
Invisible Anti-Spam & CAPTCHA reviews and ratings
50 reviews on WordPress.org, with the most recent ones as their authors posted them.
50 reviews
- 5★
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48
- 4★
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0
- 3★
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0
- 2★
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0
- 1★
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2
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Unbrauchbar!
Leider werden reguläre email-Adressen im wpcf7 Formularplugin permanent mit nachfolgenden Tags belegt. Es gibt auch keine Möglichkeit, das irgendwie zu korrigieren. Einfach nur ärgerlich. "Blocked because: Known spam value" "Blocked because: No proof of work"
vczp -
NICE! Invisible Anti-Spam working great!
I had been dealing with multiple bot problems on my website contact forms, reviews, logins, registrations, and even bots testing credit cards with multiple purchase attempts in a row. I kept adding extra code and different plugins to try to stop them, but it was becoming a nightmare. I needed something fast, easy, and effective, and I did NOT want my customers to have to solve those annoying CAPTCHA puzzles. I was referred to Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms, and I was skeptical at first because I didn't really understand this type of security technology. To my surprise, it has made a huge difference! The protection works invisibly in the background, so my customers don't have to click boxes or solve puzzles, while the plugin helps identify and stop automated bots. The best way I can describe it is like having a bodyguard at every door of your website. Instead of putting a separate lock on every door, this plugin can protect many areas, including forms, logins, registrations, comments, WooCommerce checkout, and reviews. I was worried it might block real customers, so I tested it carefully, and that hasn't been my experience. I was able to remove other anti-bot plugins and extra code I had been using before. This plug-in has simplify my website's protection. I'm very impressed with how easy it is for my customers because they don't even see it and how much easier it has made managing my bot problems. Amazing technology, and it's FREE! Thank you!
nevergiveup2021 -
Perfecto!
Es genial!
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Best Spam and ReCaptcha Protection
This is one of the best plugins for anti-spam and login protection. The developer should offer a paid option, even if it's a one-time payment, or even a donation option, for such a great plugin.
cmelchor -
Finally!
No more spam messages in an instant! Filters all spam reliably without extended configuration. Great plugin, thank you!
Rock a Robot! -
ReCaptcha is reliable
ReCaptcha has been working reliably for months
Thomas Scheiper
Where Invisible Anti-Spam & CAPTCHA ranks on WordPress.org
The rankings we track that Invisible Anti-Spam & CAPTCHA appears in, and how its position changed over 30 days.
| Ranking | WordPress.org placement | Position | 30 days |
|---|---|---|---|
| Best Anti-Spam Plugins | #47 by tag, #6 in search | #19 | – |
| Best CAPTCHA Plugins | #36 by tag, #10 in search | #21 | – |
| Best GDPR Plugins | #26 in search, not tagged | #52 | – |
| Best Password Protection Plugins | #38 in search, not tagged | #69 | – |
Invisible Anti-Spam & CAPTCHA alternatives
Plugins that solve the same problem, ranked by how closely they overlap with Invisible Anti-Spam & CAPTCHA.
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hCaptcha for WP 70,000+ installs · 4.6 -
CleanTalk 200,000+ installs · 4.8 -
Simple CAPTCHA with Cloudflare Turnstile 200,000+ installs · 4.7 -
SilentShield 10,000+ installs · 4.7 -
Antispam Bee 700,000+ installs · 4.8
Details
Invisible spam protection for every form, login and checkout. No puzzles, no checkboxes, no lost visitors — a CAPTCHA your users never see.
The full description, screenshots and every review live on the WordPress.org page.
Rankings Invisible Anti-Spam & CAPTCHA competes in
- Best Anti-Spam Plugins
- Best CAPTCHA Plugins
- Best CAPTCHA Plugins
- Best Anti-Spam Plugins
- Best Anti-Spam Plugins
Tags
- anti-spam
- captcha
- recaptcha
- spam
- spam protection
More from Matthias Nordwig
-
CF7 ReCaptcha Mine 10+ installs
- Version
- 6.0.0
- Last updated
- Aug 24, 2026
- First published
- Nov 17, 2022
- Requires WordPress
- 4.8
- Tested up to
- 7.0.4
- Requires PHP
- 7.1
- Pricing
- Free on WordPress.org
Invisible Anti-Spam & CAPTCHA FAQ
What does Invisible Anti-Spam & CAPTCHA do?
According to its WordPress.org readme, Invisible Anti-Spam & CAPTCHA offers Invisible — zero user interaction, ever, Protects everything: logins, registrations, comments, WooCommerce, every form builder — even hand-coded custom forms, No account, no API keys, no external services — install and you are done, Brute-force protection for logins, with optional Fail2Ban log support and Adaptive under-attack mode: the challenge automatically gets harder for everyone while a spam wave is running, and relaxes afterwards.
How many active installs does Invisible Anti-Spam & CAPTCHA have?
WordPress.org reports 4,000+ active installs for Invisible Anti-Spam & CAPTCHA as of September 7, 2026.
Is Invisible Anti-Spam & CAPTCHA still maintained?
Yes. The last release was on August 24, 2026 and it is tested up to WordPress 7.0.4.
Does Invisible Anti-Spam & CAPTCHA have good support?
On the WordPress.org forum, 10 of 11 recent support threads for Invisible Anti-Spam & CAPTCHA are marked resolved. That is the developer's free support; a paid version usually comes with its own channel.
Is Invisible Anti-Spam & CAPTCHA free?
Invisible Anti-Spam & CAPTCHA is free to install from WordPress.org. Many plugins also sell a paid version or add-ons.
Where does Invisible Anti-Spam & CAPTCHA rank among Anti-Spam Plugins?
Invisible Anti-Spam & CAPTCHA is #19 in the WordPress.org Anti-Spam Plugins ranking.