Ruby Captcha

An expressive, object-oriented language famous for Rails, favoring developer happiness in web apps and automation tasks.From Sinatra to Rails, TrustCaptcha equips Ruby apps with privacy-friendly, GDPR-aligned protection that keeps forms clean through proof-of-work and adaptive scoring.

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TrustCaptcha is the privacy friendly and user focused CAPTCHA for Ruby

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 Ruby

Integrate TrustCaptcha with Ruby 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 – Solve the CAPTCHA in your frontend
Integrate the CAPTCHA widget into your website or app. You can find detailed instructions for the frontend integration in our documentation. The CAPTCHA widget will then be displayed on your website or app.
Prebuild frontend integrationsYou can use one of our pre-built integrations to integrate the CAPTCHA widget into your website or application. If there is no pre-built integration from us for your preferred frontend technology, your software developers can integrate the CAPTCHA themselves using our documentation or ask our support-team for a pre-built integration solution.
5 – Validate the CAPTCHA result in your backend
When the CAPTCHA has finished, take the verification token and send it to your backend. Then retrieve the verification result from our servers and determine your next steps. You can find detailed information on backend integration in our documentation.Basic steps for RubyThe basic steps for your Ruby integration are as follows. For detailed instructions, please read our documentation.Install Dependency
Select a tab
Gem
Fetch Result
Select a tab
Fetch Result
Handle Result
Select a tab
Handle Result
Other backend technology instead of Ruby?If you do not want to use Ruby or have several backend services you can select a different language or framework here. If there is no pre-built integration from us for your preferred backend technology, your software developers can integrate the CAPTCHA themselves using our documentation or ask our support-team for a pre-built integration solution.
6 – Congratulations 🎉
You are now protected by TrustCaptcha - congratulations!

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Frequently Asked Questions

What is a Ruby CAPTCHA?

A Ruby CAPTCHA is a challenge-response test integrated into a Ruby application to separate real visitors from automated scripts. Modern solutions like TrustCaptcha run automatically in the browser, solving a lightweight proof-of-work puzzle and returning a signed token that your Ruby code verifies server-side. This keeps spam, credential stuffing and scraping bots out of your forms with only a few lines of code.

What is the best Ruby CAPTCHA?

The best Ruby CAPTCHA blends strong security, privacy and developer ergonomics. TrustCaptcha stands out for European projects because it layers adaptive proof-of-work with an AI-powered bot score, offers full GDPR compliance and lets you customise everything from language to colours. Its gem installs in seconds, and fine-tuning security thresholds or design doesn’t require touching backend logic.

How does a Ruby CAPTCHA work?

In TrustCaptcha’s flow, the frontend widget silently solves a cryptographic puzzle while our servers calculate a bot-probability score from device and session signals. The widget then returns a compact token. Your Ruby code posts that token to TrustCaptcha’s verify endpoint and receives a signed JSON result indicating success, failure or elevated risk. Based on that response you accept, block or further challenge the request.

Do I need a Ruby CAPTCHA?

If your Ruby site exposes forms, search, checkout or APIs to the public internet, you almost certainly need a CAPTCHA. Automated bots can brute-force credentials, scrape content and flood databases, hurting UX and even SEO rankings. TrustCaptcha adds a frictionless barrier that absorbs most bot traffic with virtually no impact on legitimate users. For closed, internal tools you might instead rely on strict access controls.

Is TrustCaptcha GDPR-compliant?

Yes. All verification data is processed and stored exclusively in EU data centers, no cookies are set and standard Data Processing Agreements can be signed online in minutes. This lets Ruby developers meet the strictest European privacy requirements without extra paperwork. A Minimal Data Mode is also available for projects that wish to disable behavioural scoring entirely.

Will TrustCaptcha slow my Ruby app?

No. The heavy lifting happens client-side and on TrustCaptcha’s edge network, while the gem makes a single HTTPS POST that averages well below 100 ms. Independent benchmarks show pages load up to three times faster than image-based CAPTCHAs because no puzzles, images or extra scripts are downloaded.

Can I style TrustCaptcha to match my brand?

Absolutely. You can switch between light and dark themes, override every colour, hide branding, localise texts in 35+ languages and even run the widget invisibly with a subtle status hint. All options are configurable from the dashboard or via query parameters, so designers can iterate freely without redeploying your Ruby code.