Best CAPTCHA Software for Freelancers

MTCaptcha is a smart captcha service that prioritizes privacy and accessibility. It offers an adaptive invisible noCaptcha that is easy for humans but hard for bots, making verification frictionless. MTCaptcha is GDPR and WCAG compliant, ensuring that your data is never sold or shared with third parties. The captcha images are certified colorblind safe and the widget is fully VPAT compliant and optimized for screen readers. MTCaptcha supports any language and can be fully customized to match any webpage. It also supports audio in captcha, making it accessible to users who are visually impaired. MTCaptcha is trusted by Enterprises, Government, NGOs worldwide and is available in all the major world languages. MTCaptcha works around the world, including in China, making it a truly global captcha solution. It is backed by an adaptive Risk Engine that monitors and responds to threats, making it difficult for bots but easy for humans.

ALTCHA is a free CAPTCHA alternative that uses a proof-of-work mechanism to protect your website, and online services from spam. ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content. Unlike other solutions, ALTCHA is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR. What makes ALTCHA unique is that it is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR. Unlike other captcha solutions, ALTCHA does not require users to solve puzzles or captchas and uses a proof-of-work mechanism instead. ALTCHA’s Spam Filter is a GDPR-compliant anti-spam solution automatically classifying user-submitted data and intercepting spam before it reaches you.

Organizations—from startups to large enterprises—use Friendly Captcha to protect their websites and online services from spam and abuse. Friendly Captcha respects your user’s privacy and works automatically, so your users don’t have to do anything. Based on the underlying mechanisms of the blockchain, Friendly Captcha employs a fundamentally new approach to securely defend your websites and online services from spam and bots. Friendly Captcha does not depend on tracking your users and exploiting personal data. Plus, your users no longer have to deal with tedious labeling tasks. They don’t have to do anything at all.

Turnstile delivers frustration-free, CAPTCHA-free web experiences to website visitors - with just a simple snippet of free code. Moreover, Turnstile stops abuse and confirms visitors are real without the data privacy concerns or awful UX that CAPTCHAs thrust on users. Give your web visitors an even better experience. Turnstile confirms they are real with no visual puzzle - totally transparent to visitors. Turnstile always preserves the privacy of web visitors on your site - without sacrificing effectiveness. Unlike other CAPTCHA options, we never harvest data for ad retargeting. Deploy in minutes with just a quick code snippet - and totally free of charge. Humans spend about 500 years each day solving CAPTCHAs - wasting time and creating frustration. This is why Cloudflare built a better alternative to CAPTCHAs with Managed Challenge and now Turnstile.

Online businesses rely on CaptchaFox to defend and safeguard their website and services against automated bot attacks. CaptchaFox protects against account takeover, credential stuffing, spam and scalping while complying with global privacy laws, such as GDPR, CCPA, and more. Through minimized data collection and retention during verification, the privacy of your users is always preserved. CaptchaFox utilizes a variety of data signals and dynamic response challenges to verify the authenticity of visitors without the use of cookies or trackers. The challenges have low friction and are easy for humans to solve but difficult for bots. The service is available in multiple languages and scales to incoming traffic through our global infrastructure. Enterprise customers can access advanced threat insights to achieve complete risk awareness.

Prosopo Procaptcha redefines user verification with a unique approach that emphasizes privacy, security, and decentralization. It's a pioneering solution designed to offer an alternative to conventional, centralized CAPTCHA systems that often compromise user privacy. By choosing Prosopo Procaptcha, you're not only safeguarding your applications from bots and malicious actors but also upholding the privacy of your users.

The service identifies requests similar to automatic ones, identifies bots, and filters them out without loss of response speed. For analysis, we use ML models trained on datasets containing data on many years of experience in protecting Yandex web resources. The datasets are regularly updated. The service does not use ready-made images, but generates them independently, making it possible to maintain an 85% level of human recognition while making it difficult for bots to recognize the CAPTCHA. SmartCaptcha is deployed in the Yandex Cloud infrastructure, which complies with international standards and Russian information security laws. Add verification to your site without the “I’m not a robot” button. An invisible captcha will only be seen by users with suspicious-looking requests. The service generates texts for recognition independently, and you can choose their level of complexity.

BotDetect™ CAPTCHA generator is a non-stalking form-security solution that uses a mix of measures, that are easy for humans but hard for bots, to prevent automated form posting. BotDetect also provides an audio Captcha alternative to keep websites accessible to people with impaired vision, enabling you to make WCAG and Section 508 compliant websites. The years of Google’s relentless abuses of their organic and paid search monopolies, and the years of their equally relentless campaign of disinformation and FUD about captchas, took a toll among our former competitors there are only two viable players left. During its first decade, BotDetect was unique among Captcha generators in offering many different Captcha image and sound algos. While each of them was easily comprehensible to humans, the random use of multiple Captcha generation algos made the generated captchas extremely difficult to pass automatically.

The TextCaptcha service provides access to textual CAPTCHA challenges via a simple JSON or XML API over HTTP. The question is the textual challenge that should be presented to the user. The answers are the MD5 hashes of correct lower cased answers: you should be able to check responses from real users you challenge with the question against these checksums. A text CAPTCHA is more accessible to visually impaired users than their image-based alternatives like ReCAPTCHA. Using text is also more flexible if for example you need to present the challenge over a text-only channel like SMS or IRC. The problem with text CAPTCHAs is that they provide inherently more information than a distorted image. They are parseable, under the right conditions solveable. With the advent of contextual parsing tools such as Wolfram Alpha, such simple logic puzzles have become easier to solve programatically.

Fraudulent web activities cost enterprises billions of dollars each year. Security teams need to keep the bad actors out of their websites and ensure that their customers can always get in. reCAPTCHA has been defending millions of sites for almost a decade, and the reCAPTCHA enterprise service builds on this technology with capabilities designed specifically for enterprise security concerns. With reCAPTCHA Enterprise, you can defend your website against fraudulent activity like scraping, credential stuffing, and automated account creation and help prevent costly exploits from automated bots. And, just like reCAPTCHA v3, reCAPTCHA Enterprise will never interrupt your users with a challenge, so you can run it whenever you like without affecting conversion. reCAPTCHA Enterprise uses an adaptive risk analysis engine to keep automated software from engaging in abusive activities on your site.

Traditional captcha identifies bots from legitimate users with cognitive challenge. Humans are good at visual recognition task such as image or item recognition, whereas machines not. However, with the development of machine learning, machines are also capable of these cognition tasks. To defend against the sophisticated bot threats, traditional CAPTCHA has to be harder, which leads to high user friction and translates to reduced conversion rates. To solve the security vs user experience problem, GeeTest developed AI-powered Slide CAPTCHA in 2012. Instead of visual recognition challenge, Powered by massive biometric data collected in the past 8 years, GeeTest built a self-adaptive defense model based on Graph Convolutional Networks (GCN). By analyzing over 200+ parameters, our dynamic defense model provides you with a broader and deeper understanding of bot activities associated with any API.

The top online services rely on hCaptcha Enterprise for best-in-class bot and fraud management. Ad networks see your visitors as the product. We only care whether a visit is good or bad. hCaptcha complies with GDPR, CCPA, LGPD, PIPL, and other global data laws. Protect your services from scraping, account takeovers, credential stuffing, and spam with our advanced machine learning and humanity verification. Minimizing friction for real users is important. hCaptcha uses simple tasks and takes less time for most users while stopping more bot traffic. hCaptcha combined advanced self-supervised machine learning with a novel edge compute approach that uniquely minimizes data collection and retention, delivered from over 250 locations globally for massive scalability. hCaptcha allows websites to earn rewards while blocking bots and other forms of abuse.

Solve Media's CAPTCHA TYPE-IN™ ads are an easy plug-in solution that saves your users time while making your site more secure and more profitable. Instead of struggling with difficult puzzles, users quickly enter a simple brand message or security phrase. Help your users reach their destination quickly and easily, saving them an average of 7 seconds every time. Earn incremental revenue from previously un-monetized placements on a revenue share model. Behind our TYPE-IN™ ads is a sophisticated technology that protects your site from bots, spammers, and attackers. Our security advisory council is comprised of industry-leading experts who drive the technology that makes safe online advertising possible. CAPTCHA is a test to determine if an end user is a human or an automated bot. Did you know that bots account for 25% of web traffic? As a Solve Media partner, some of the industry's best security minds have you protected.

More than 50.000 sites worldwide use our protection. Improve your captcha in 5 minutes. We have captcha plugins for 19 popular content management systems such as Concrete5, phpBB, Simple Machines Forum, MediaWiki, PunBB, MyBB, Movable Type, DataLife Engine, Phorum, Woltlab BB, OpenCart, Pligg, and XOOPS.

Arkose MatchKey challenges provide a unique user experience, performance improvements, and powerful styling features. Traditional CAPTCHAs don’t work because bots get around them. But Arkose MatchKey challenges are designed to meet modern threats head-on by providing the best of defensibility, usability, and accessibility in one product. In fact, Arkose MatchKey is the strongest CAPTCHA ever made. Arkose MatchKey is a state-of-the-art series of challenges with industry-leading security. An unparalleled variety of 3D imagery. Our strongest challenges may produce more than 1,250 variations of a problem to solve. All are incredibly easy for legitimate users, but the variety makes it incredibly difficult to solve with automation. We use a key image to solve the largest problem with challenge design: Conveying instructions that are universally understandable across all languages and cultures. Large, aesthetically pleasing images are easy to see.

When it comes to fraud, prevention is more cost-effective than cure. By deploying intuitive traffic testing, the CyberSiARA system provides a proactive approach to cyber-security that stops fraud in its tracks. The traffic classification capability differentiates between genuine users and potential attackers in real-time using interactive enforcement challenges – quickly halting both automated and human-driven attacks before a breach can be made. CyberSiARA uses powerful traffic analysis processes to determine user intent. By identifying fraud signifiers in traffic behavior, the system deploys interactive challenges to test activity classified as suspicious. This allows genuine users to enjoy a seamless access experience, while attacks from a broad range of origins are defeated. Traffic designed to overcome authentication challenges is stopped with innovative challenge strategies.

GoCaptcha: First 100k verifications free monthly, fortifying websites against bots and spam. Although bots are able to bypass conventional CAPTCHAs, the GoCaptcha challenges have been specifically created to effectively counter modern threats. By offering a combination of defensibility, usability, and accessibility, GoCaptcha is a single product that can handle a variety of challenges. In fact, it's the most powerful CAPTCHA solution available. GoCaptcha provides a better user experience compared to traditional CAPTCHAs. This is because it uses a combination of fun and interactive challenges that are easy for humans to solve but difficult for bots. Overall, the combination of engaging challenges, clear presentation, and accessibility features makes GoCaptcha a more user-friendly and enjoyable CAPTCHA solution.

Our patent pending NLP Technology platform helps you fight against the malicious bot traffic that is eating out on your precious resources and interfering in the browsing experience of the real audience. We do not just prevent bot traffic but also help you understand your real readers. These in-depth insights about their browsing patterns and their preferences help you strengthen your overall strategy to further engage your loyal users and hence boost your traffic organically. Nothing can be better than increasing revenues. Each of our product has an associated revenue stream without any cost and thus directly helps in increasing your profits.