Best CAPTCHA Software in South America

ALTCHA is a modern security and privacy-focused platform built to defend web services from bots and abuse — without compromising the user experience. At the heart of its ecosystem is ALTCHA Sentinel, a next-generation threat detection and mitigation system designed to protect websites, APIs, and applications from automated attacks, spam, and other forms of abuse. ALTCHA Sentinel stands out by combining adaptive machine learning, behavioral analysis, and smart verification techniques. It doesn’t rely on intrusive CAPTCHAs or outdated blocking tactics; instead, it works invisibly behind the scenes, analyzing traffic patterns in real time to identify and stop threats before they cause harm. Sentinel protects critical entry points like sign-up forms, login pages, and comment sections — all while keeping the experience seamless for real users.

Dynamic & PoW CAPTCHA: Real-Time Bot & Cyber Threat Defense | Prosopo Procaptcha Prosopo Procaptcha provides comprehensive protection against various automated threats, including web scraping, credential stuffing, account takeover attempts, clicks fraud, distributed denial of service (DDoS) attacks, inventory hoarding, credit card fraud, and other forms of malicious bot activity that can harm your online business or compromise user data. With no hidden fees and transparent pricing, our solution provides an affordable alternative to expensive services like reCAPTCHA and hCaptcha. Procaptcha dynamically evaluates user interactions by analyzing browser environments and behavior. Based on risk scores, it automatically applies the appropriate challenge, making it difficult for bots to bypass while ensuring a smooth experience for real 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.

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.

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.