TrustCaptcha - Bot protection

Go CAPTCHA. Eliminate bots and spam.

TrustCaptcha efficiently safeguards your Go applications from bot assaults and spam in minutes with the ready-made CAPTCHA-for-Go integration. TrustCaptcha stops potential customers from leaving by entirely removing irritating image puzzles or tasks. TrustCaptcha shields you from data violations, legal notices and penalties – rely on the European CAPTCHA replacement for Go with a strong focus on data privacy and GDPR conformity.

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GDPR compliant

EU hosted

Trusted by companies, organisations and governments.

Why TrustCaptcha

TrustCaptcha saves you money and increases your conversion

Save money! Eliminate botsProtect your website from bot attacks and spam. Save yourself the resulting follow-up costs for higher server capacity, support staff, moderation teams and software developers. Learn how TrustCaptcha eliminate bots

Avoid fines! Be GDPR compliantDon't worry about the legal situation, bureaucracy and the threat of fines. Use TrustCaptcha-for-Go as a data protection-friendly and GDPR-compliant CAPTCHA alternative. More about the GDPR-compliance of TrustCaptcha

Don't lose customers! Increase conversionDon't make it difficult for your users to use your website with annoying image puzzles or tasks. Our CAPTCHA-for-Go ensures maximum conversion by making the website accessible to everyone with one click. Learn how TrustCaptcha makes your website accessible

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Integrate TrustCaptcha

Integrate TrustCaptcha in Go now! Simply follow these steps

Integrate TrustCaptcha with Go 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 trial 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 GoThe basic steps for your Go integration are as follows. For detailed instructions, please read our documentation.Install Dependency
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Go
go get github.com/trustcomponent/trustcaptcha-go/v2@v2.0.1
Fetch Result
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Fetch Result
// Retrieving the verification result verificationResult, err := trustcaptcha.GetVerificationResult("<your_secret_key>", "<verification_token_from_your_client>") if err != nil { log.Printf("Failed to fetch verification result: %v", err) http.Error(w, "Captcha verification failed", http.StatusInternalServerError) return }
Handle Result
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Handle Result
// Act on the verification result if !verificationResult.VerificationPassed || verificationResult.Score > 0.5 { log.Println("Verification failed or bot score > 0.5 – possible automated request.") }
Need more information about the Go integration?Here are a few more ways to familiarize yourself further with the integration.
Read the documentation
View code sample on Github
View source code on Github
View package on go.dev
Other backend technology instead of Go?If you do not want to use Go 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!

Frequently Asked Questions

Do you need more information about the Angular integration?

Frequently Asked Questions

What is a Go CAPTCHA?

A Go CAPTCHA is a verification step that you call from server-side code written in the Go programming language to decide whether an incoming request is made by a human or a bot. It relies on a signed token that the client’s browser obtains from a CAPTCHA widget and then submits to your Go back end for validation. TrustCaptcha’s Go SDK wraps this flow in a single helper, so your handler can verify requests with one function call while inheriting multi-layered security.

What is the best Go CAPTCHA?

The best Go CAPTCHA in 2025 balances robust security, privacy compliance and friction-free UX—factors Google’s Helpful Content and page-experience systems now reward. TrustCaptcha leads here because it layers adaptive proof-of-work, an AI-driven bot-score and fine-grained security settings instead of relying on a single puzzle, giving stronger protection than other Go-ready options. It also runs entirely in EU data centers and ships with ready-made Data Processing Agreements, a must-have for GDPR-sensitive projects.

How does a Go CAPTCHA work?

A modern Go CAPTCHA adds a small JavaScript widget to the client that silently solves a proof-of-work task and collects device signals. The browser then posts a short-lived token to your Go API, where your code calls the CAPTCHA provider’s verify endpoint to receive a verdict. TrustCaptcha augments this flow with an AI-based bot-score and configurable thresholds, so you can increase or relax enforcement without rewriting code.

Do I need a Go CAPTCHA?

If your Go application accepts user input—registrations, comments, checkout, APIs—or shows signs of spam, credential stuffing or scraping, a CAPTCHA is the fastest way to cut automated abuse. Even small sites see bot traffic spikes, and mitigating them early avoids wasted bandwidth and fraudulent sign-ups. TrustCaptcha’s invisible mode keeps these protections running in the background so genuine users rarely notice a challenge.

Is TrustCaptcha GDPR compliant?

Yes. TrustCaptcha is fully hosted in the European Union, minimises collected data, sets no cookies and offers an online Data Processing Agreement that you can accept in minutes. This privacy-by-design approach satisfies Articles 25 and 32 of the GDPR and makes TrustCaptcha a safe drop-in for EU businesses and public-sector projects.

Can I customise the look of TrustCaptcha in Go?

Absolutely. The widget supports more than 35 languages, light, dark or auto themes, custom colours, rounded corners and even a fully invisible mode. You can hide TrustCaptcha branding, point the privacy link to your own policy and adjust width or autostart behaviour—changes that load instantly without touching your Go back end. These options let the CAPTCHA blend seamlessly with any design system.

How does TrustCaptcha stay accessible while blocking bots?

TrustCaptcha eliminates picture-picking and audio puzzles; instead it runs proof-of-work in the background and scores behaviour, finishing in under a second for legitimate users. This zero-interaction model meets WCAG 2.2 guidelines and shows a 183 % conversion lift over puzzle-based CAPTCHAs, according to internal benchmarks. Users with assistive technologies see no barrier, yet attackers must burn CPU cycles and often still fail the bot-score threshold.

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