TOP-5 most popular captchas in the world

A CAPTCHA is an identification test used by websites to verify that a user is a human and not a computer bot. Captcha is often used to protect against spam and automatic sending of messages.

There are several different types of captcha that can be used on websites. In this article, we will look at the statistics of using different types of captcha.

1. Text captcha

Text captcha is one of the most common types of captcha. It is an image that displays the text that the user must enter in the input field. Text captcha is usually used to protect against automatic registration and sending spam messages.According to a study by Imperva, about 90% of all captchas used on websites are text captchas. Text captchas are usually easy to read by humans, but can be difficult for computer programs to recognize.

2. Graphic captcha

A graphic captcha is an image that displays garbled characters that the user must enter in the input field. Graphic captchas are usually more difficult for computer programs to recognize than text captchas.According to a study by Imperva, about 5% of all captchas used on websites are graphic captchas. They can be more difficult for users than text captchas as the characters can be garbled to the point of being difficult to read.

3. Audio captcha

An audio captcha is a voice recording that says a combination of characters that the user must enter in the input field. Audio captcha is commonly used to protect against spambots that may be blind or have limitations in using computer screens.According to a study by Imperva, about 5% of all captchas used on websites are audio captchas. They may be useful for users who have visual impairments, but may be difficult to read due to noise or poor recording quality.

4. Math captcha

A math captcha is a simple math problem that the user must solve to prove they are human. Problems can be in the form of simple calculations, such as 2+2, or more complex, such as solving an equation.According to a study by Imperva, about 1% of all captchas used on websites are math captchas. They may be easy for users, but they can be easily bypassed with computer programs.

5. ReCaptcha

ReCaptcha is a free captcha developed by Google that uses neural networks to determine if a user is a human. ReCaptcha is commonly used to protect against spam and also to help recognize characters on old scanned documents.

According to a study by Imperva, about 0.5% of all captchas used on websites are ReCaptcha. This can be quite complex for users, as it may require several steps, such as selecting all vehicle images.

In conclusion, captcha is an important tool for protecting websites from spam and automated attacks. Different types of captchas have their own advantages and disadvantages, and the choice of a certain type of captcha depends on the specific needs of the website. However, in general, text captcha is the most popular form of captcha used on most websites.

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