Best Web-Based CAPTCHA Software of 2024

MTCaptcha is a privacy-focused and accessible captcha service. It offers an adaptive invisible noCaptcha that ensures easy verification for humans while posing a challenge for bots. MTCaptcha complies with GDPR and WCAG, guaranteeing the protection of your data without any sharing or selling to third parties. The captcha images are colorblind-safe, and the widget is fully VPAT compliant, optimized for screen readers. Supporting multiple languages, MTCaptcha can be fully customized to match any webpage. It also provides audio support, enhancing accessibility for visually impaired users. Trusted by Enterprises, Government, NGOs worldwide, MTCaptcha is available in major languages and functions globally, including in China. Its adaptive Risk Engine effectively detects and responds to threats, maintaining the balance between challenging bots and facilitating human verification.

ALTCHA is a CAPTCHA alternative which uses a proof of work mechanism to protect websites and online services against spam. ALTCHA uses a mechanism of proof-of-work to protect your website, online services, and APIs from spam and unwanted material. Unlike other solutions ALTCHA is open-source, self-hosted and free. It does not require external services and does not use fingerprinting or cookies.

Friendly Captcha is used by organizations of all sizes, from startups to large corporations, to protect their online services and websites against spam and abuse. Friendly Captcha protects your users' privacy and works automatically so they don't need to do anything. Friendly Captcha is a new way to protect your website and online services against spam and bots. It uses the underlying mechanisms in the blockchain. Friendly Captcha doesn't rely on tracking users or exploitation of personal data. Plus, your users will no longer be burdened with tedious labeling tasks. They don't need to do anything.

Turnstile provides website visitors with a CAPTCHA-free experience, without any frustration. All it takes is a small piece of free code. Turnstile also stops abuse and confirms that visitors are real, without the data privacy concerns of CAPTCHAs or the awful UX they force on users. Give your website visitors an even more enjoyable experience. Turnstiles are 100% transparent to visitors, as there is no visual puzzle to confirm their authenticity. Turnstile protects the privacy of your web visitors without compromising effectiveness. We never collect data for retargeting ads, unlike other CAPTCHA solutions. You can deploy in just minutes using a small code snippet. Humans waste time and create frustration by spending 500 years a day on CAPTCHAs. Cloudflare has built a better CAPTCHA alternative with Managed Challenge, and now Turnstile.

CaptchaFox is used by online businesses to protect and safeguard their websites and services from automated bot attacks. CaptchaFox provides protection against account takeovers, credential stuffings, spam, and scalping, while also complying with global privacy legislation, such as GDPR and CCPA. Privacy is protected by minimizing data collection and retention when verifying your users. CaptchaFox uses a variety data signals and dynamic responses challenges to verify the genuineness of visitors, without the use or tracking cookies. The challenges are low friction for humans and difficult for bots. The service is available across multiple languages, and can scale to the incoming traffic via our global infrastructure. Enterprise customers have access to advanced threat insights for complete risk awareness.

Prosopo Procaptcha redefines the user verification process with a unique, decentralized approach that emphasizes privacy and security. It's an innovative solution that offers an alternative to centralized CAPTCHAs, which often compromise privacy. By choosing Prosopo Procaptcha you not only protect your applications from malicious actors and bots, but also maintain the privacy of your users.

The service filters out bots without affecting response time. We use ML models that are trained on datasets with data from many years of experience protecting Yandex's web resources. The datasets are updated regularly. The service generates images independently and does not use pre-made images. This allows it to maintain a human recognition rate of 85% while making it harder for bots to recognise the CAPTCHA. SmartCaptcha runs on the Yandex Cloud, which is compliant with international standards and Russian laws regarding information security. Verify your website without the "I am not a bot" button. Only users who make requests that look suspicious will see the invisible captcha. You can select the level of complexity for the texts that are generated by the service.

BotDetect™, CAPTCHA generator is an automated form-security solution that prevents automated form posting. It uses a combination of measures that are simple for humans and difficult for bots. BotDetect provides an audio Captcha alternative that allows websites to be accessible to people with impaired vision. This will allow you to create Section 508 and WCAG compliant websites. Our former competitors are now only two viable ones after years of Google's inexplicable abuses of their paid and organic search monopolies. BotDetect was the only Captcha generator that offered a variety of Captcha sound and image algos during its first decade. Each of them was easy to understand, but the random use multiple Captcha generation algorithms made it extremely difficult to pass the generated captchas automatically.

The TextCaptcha Service provides access to textual CAPTCHA problems via a simple JSON API or XML over HTTP. The question is a textual challenge to be presented to the user. The answers are MD5 hashes for correct lowercased answers. You should be able check responses from real users that you challenge with a question against these checksums. Text CAPTCHAs are more accessible to visually impaired people than image-based CAPTCHAs like ReCAPTCHA. Text is also more flexible, for example if you need to present a challenge via a text-only channel such as SMS or IRC. The problem with text CAPTCHAs, is that they give inherently more information than an image distorted. They can be parsed, and under the right circumstances they are solvable. These simple logic puzzles are now easier to solve using Wolfram Alpha and other contextual parsing tools.

Fraudulent web activities cost businesses billions of dollars every year. Security teams must ensure that bad actors are not allowed to access their websites and that their customers have the ability to get in. reCAPTCHA has been protecting millions of sites for nearly a decade. The reCAPTCHA Enterprise service builds on this technology and provides capabilities specifically designed for enterprise security concerns. Using reCAPTCHA Enterprise you can protect your website from fraudulent activity such as scraping, credential stuffing and automated account creation. You also help to prevent costly exploits by automated bots. Unlike reCAPTCHA v3, reCAPTCHA enterprise will not interrupt your users with a challenge. You can run it whenever and wherever you want without affecting conversion. reCAPTCHA Enterprise uses adaptive risk analysis engines to prevent automated software from engaging with abusive activities on your site.

Traditional captcha distinguishes bots from legitimate users who have cognitive challenges. Machines are not able to recognize images or items. Humans are better at visual recognition tasks like item recognition and image recognition. Machine learning has made it possible for machines to perform these cognition tasks. Traditional CAPTCHA is too difficult to protect against sophisticated bot threats. This leads to high user friction, which in turn results in lower conversion rates. GeeTest created Slide CAPTCHA powered by AI in 2012 to solve the security vs user-experience problem. GeeTest developed an AI-powered Slide CAPTCHA in 2012 to replace the visual recognition challenge. This model was built using massive biometric data over the past 8 years. It is based on Graph Convolutional Networks. Our dynamic defense model, which analyzes over 200 parameters, gives you a deeper understanding of bot activities related to any API.

Top online services rely upon hCaptcha Enterprise to provide the best in class bot and fraud management. Ad networks view your visitors as their product. We care only about whether a visitor is good or not. hCaptcha complies to GDPR, CCPA and other global data laws. Our advanced machine learning and human verification will protect your services against scraping, account takeovers and spam. It is important to minimize friction for real users. hCaptcha is simple and takes less time to complete for most users, while stopping more bot traffic. hCaptcha combines advanced self-supervised learning with a novel approach to edge computing that minimizes data retention and collection. It is delivered from more than 250 locations worldwide for massive scalability. hCaptcha is a tool that allows websites to earn rewards and block bots.

Solve Media's CAPTCHA Type-In™ Ads are an easy plug in solution that saves users time and makes your site more secure. Instead of struggling to solve difficult puzzles, users can quickly enter a brand message or security phrase. Your users will save an average of seven seconds each time they use your service. Earn incremental revenue on a revenue-share model from previously unmonetized placements. Behind our TYPE IN™, ads is a sophisticated techniqe that protects your website from bots, attackers, and spammers. Our security advisory council is made up of leading industry experts who are responsible for the technology that makes online advertising safe. CAPTCHA is used to determine whether an end-user is a real person or a robot. Did you know that bots make up 25% of all web traffic? As a Solve Media Partner, you're protected by some of the best security minds in the industry.

More than 50.000 websites worldwide use our protection. Improve your captcha in 5 minutes. We have captcha plug-ins for 19 popular content managing systems, including Concrete5, phpBB Simple Machines Forum MediaWiki PunBB MyBB Movable Type DataLife Engine Phorum Woltlab BB OpenCart Pligg XOOPS.

Arkose MatchKey challenges offer a unique user-experience, performance improvements, as well as powerful styling features. Traditional CAPTCHAs are not effective because bots can get around them. Arkose MatchKey challenges, on the other hand, are designed to face modern threats by combining defensibility with usability and accessibility. Arkose MatchKey has the strongest CAPTCHA made. Arkose MatchKey offers a series of challenges that are state-of-the art and feature industry-leading security. Unparalleled variety of 3D images. Our toughest challenges can produce over 1,250 different variations of a particular problem. The challenges are easy to solve for a human, but the complexity makes it difficult to automate. We use a key picture to solve the biggest problem with challenge design. That is, conveying instructions that are universally understood across all cultures and languages. Large, attractive images are easy to read.

Prevention is always more cost-effective when it comes to fraud. CyberSiARA's intuitive traffic testing provides a proactive cyber-security approach that stops fraud at its tracks. The traffic classification capability distinguishes between real users and potential attackers using interactive enforcement challenges in real-time. This stops both automated and user-driven attacks. CyberSiARA uses powerful processes for traffic analysis to determine user intention. The system uses interactive challenges to test suspicious activity by identifying fraud indicators in traffic behavior. This allows legitimate users to have a seamless experience while attacks of all kinds are defeated. Innovative challenge strategies are used to stop traffic designed to overcome authentication challenges.

GoCaptcha - First 100k verifications are free every month, protecting websites from bots and spam. The GoCaptcha challenges were specifically designed to counter modern threats, even though bots can bypass traditional CAPTCHAs. GoCaptcha offers a combination of accessibility, usability and defensibility. It is a product that can tackle a variety challenges. It's the most powerful CAPTCHA available. GoCaptcha offers a better user-experience than traditional CAPTCHAs. This is because GoCaptcha uses a combination fun and interactive challenges which are easy for humans but difficult for bots to solve. GoCaptcha is a CAPTCHA solution that is more user-friendly because of its combination of fun challenges, clear presentation and accessibility features.

Our patent-pending NLP Technology platform helps to fight the malicious bot traffic that consumes your precious resources while interfering with the browsing experience of real audiences. We don't just stop bot traffic, but we also help you to understand your real readers. These insights into their browsing habits and preferences will help you improve your overall strategy and engage your loyal users, thereby increasing your organic traffic. Increased revenues are the best thing you can do. Each of our products has a revenue stream that is associated with it without any costs and directly helps you increase your profits.