Joomla Captcha Plugin

An open-source CMS that lets non-developers publish, organize and extend websites through a rich plugin marketplace.Block spam on Joomla forms with the privacy-first European CAPTCHA that installs in minutes, meets WCAG 2.2 and uses zero cookies.

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TrustCaptcha is the privacy friendly and user focused CAPTCHA for Joomla

Security & Bot-ScoreTrustCaptcha combines a proof-of-work with a bot score — similar to the reCAPTCHA score — and custom security configurations for maximum security. Learn more about the CAPTCHA security concept

Privacy Friendly & GDPR-CompliantTrustCaptcha is a privacy-first CAPTCHA solution with a clear focus on data protection and GDPR compliance. Learn more about the GDPR-compliant CAPTCHA

CustomizationAll features of the CAPTCHA widget are fully customizable such as translations or design. The branding or the entire widget can also be hidden. Learn more about the customization

AccessibilityThe CAPTCHA completely dispenses with puzzles or image marking tasks. The CAPTCHA works fully automated and complies with international accessibility standards. Learn more about the accessibility

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Integrate TrustCaptcha in Joomla

Integrate TrustCaptcha with Joomla quickly and easily into your website, application or platform in just a few steps and effectively protect your online presence and services from bot abuse.

1 – Sign in or sign up
The first thing you need to do is sign in to your Trustcomponent account. If you do not yet have a Trustcomponent account, you can register with us quickly and easily in just a few steps. After that, go to your dashboard. Here you will see all existing CAPTCHAs and can create new CAPTCHAs.
2 – Choose existing CAPTCHA or create a new CAPTCHA
If you already have a CAPTCHA that you want to use, skip this step. If you don't have a CAPTCHA yet, create a new CAPTCHA now.Create a new CAPTCHADuring the creation process, select the “TrustCaptcha” product category and choose your preferred pricing plan. If you are not yet sure which pricing plan to choose, no problem! The plan can be extended at any time. Then decide whether you want to start with the 30-day trial version or go straight to a paid subscription. If you want to start directly with a paid CAPTCHA, all you have to do is add your billing details and optionally a payment method and you're ready to go.30-day trail periodIf you opt for the 30-day trial period, you can test CAPTCHA for 30 days risk-free. At the end of the 30-day trial period, CAPTCHA locks itself. During the 30-day trial period or up to 30 days after the end of the trial period, you can unsubscribe from CAPTCHA at any time for a fee or delete it with immediate effect. If you neither subscribe to the CAPTCHA for a fee nor delete it within 30 days of the end of the free trial period, it will be deleted automatically.Non-Commercial PlanIn addition to our standard plans, we also offer a permanently free “Non Commercial“ plan with 1 website and up to 500 free verifications for non-commercial websites and projects.
3 – Add your websites and check your credentials
On the dashboard of your CAPTCHA you will find all the important information, statistics and setting options. Here you will also find your site-key, the secret-key and, if available, the license-key. You will need these later on when integrating your CAPTCHA.Add your websitesYour CAPTCHA may only be accessed by websites that you explicitly authorise. To allow websites to access the CAPTCHA, enter all the websites on which you want to integrate the CAPTCHA in the settings.
4 – Install the Joomla CAPTCHA plugin
Note: The Joomla integration is currently under development and will be available soon.However, you can also use TrustCaptcha in Joomla without a pre-build integration. You can find all the necessary information about a custom integration in our documentation.If you would like to ask us to prioritize the development of this integration or have any other concerns, please contact our support team. We will be happy to help.
5 – Congratulations 🎉
You are now protected by TrustCaptcha - congratulations!

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Frequently Asked Questions

What is a Joomla CAPTCHA?

A Joomla CAPTCHA is a human-verification mechanism you add to Joomla forms, log-ins and comments. It analyzes the visitor’s interaction—either through a quick challenge or background risk scoring—to confirm they’re not an automated bot. When the test is passed, the form submission continues; if it fails, the request is blocked. The result is cleaner data and reduced exposure to spam and credential-stuffing attacks.

What is the best Joomla CAPTCHA?

The 'best' choice balances security, privacy, accessibility and ease of integration. Many European site owners choose TrustCaptcha because its multi-layer approach—proof-of-work, AI-driven bot score and adjustable security thresholds—outperforms plugins that rely on proof-of-work alone. The service is hosted entirely in the EU and ships with one-click Data Processing Agreements, making GDPR compliance straightforward. Always run a test on your staging site to confirm that the plugin meshes with your template and extensions.

How does a Joomla CAPTCHA work?

When the page loads, the CAPTCHA script initializes and evaluates each visitor in the background. TrustCaptcha first triggers a lightweight proof-of-work, then feeds behavioral and device signals into an AI model that returns a bot-probability score. Your Joomla backend filters the request according to the score and the thresholds you configured, optionally presenting a second-layer challenge to suspicious clients. Because most checks happen client-side and asynchronously, genuine users experience virtually no delay.

Do I need a Joomla CAPTCHA?

If your Joomla site exposes forms—registrations, contact, comments or search—bots will eventually find them. A modern CAPTCHA blocks spam bursts, credential stuffing and scraper abuse before they hit your database or analytics. TrustCaptcha does this invisibly by running automatically without puzzle prompts, so legitimate visitors see no extra friction. For most sites, that translates into lower server load and fewer manual moderation hours.

Is TrustCaptcha GDPR-compliant for Joomla websites?

Yes—TrustCaptcha is engineered and hosted entirely within the European Union and processes only the minimum data required for bot detection. A ready-made Data Processing Agreement and SLA can be accepted in one click from the dashboard, satisfying Article 28 and Schrems II concerns. No cookies are stored and no data leaves the EU, so privacy audits become far easier.

Can I customize TrustCaptcha’s design and language in Joomla?

Absolutely. You can choose light or dark themes, tweak colors, add your logo or hide the branding completely for a white-label look. The widget supports more than 30 languages and auto-detects the visitor’s browser language, which is perfect for multilingual Joomla sites. All appearance changes propagate instantly via the dashboard—no code redeploy required.

Will TrustCaptcha slow down my Joomla site?

No. The widget adds less than 1 kB of compressed JavaScript to the critical path and loads asynchronously, so Core Web Vitals like Largest Contentful Paint stay untouched. The proof-of-work runs in a separate thread that is negligible for humans but up to 30 × slower for bots, which actually reduces server strain. Benchmarks on typical Joomla installations show an average impact well under 10 ms per page view.