Tough on bots
Easy on humans
The reCAPTCHA advantage
Advanced Security
State of the art spam & abuse protection for your website
Ease of Use
Low friction, effortless interaction for your users.
Creation of Value
Apply the human bandwidth to benefit people everywhere
What is reCAPTCHA?
reCAPTCHA is a free service to protect your website from spam and abuse. reCAPTCHA uses an advanced risk analysis engine and adaptive CAPTCHAs to keep automated software from engaging in abusive activities on your site. It does this while letting your valid users pass through with ease.
reCAPTCHA offers more than just spam protection. Every time our CAPTCHAs are solved, that human effort helps digitize text, annotate images, and build machine learning datasets. This in turn helps preserve books, improve maps, and solve hard AI problems.
Advanced Security
reCAPTCHA protects and defends
reCAPTCHA is built for security. Armed with state of the art technology, it always stays at the forefront of spam and abuse fighting trends. reCAPTCHA is on guard for you, so you can rest easy.
Not just distorted text
reCAPTCHA doesn’t depend solely on text distortions to separate man from machines. Rather it uses advanced risk analysis techniques, considering the user’s entire engagement with the CAPTCHA, and evaluates a broad range of cues that distinguish humans from bots.
Bots Beware
reCAPTCHA is the most widely used CAPTCHA provider in the world. Our broad installed publisher base provides an unparalleled view into abusive activity on the internet. So bad guys cannot hide. reCAPTCHA knows when to be tough to keep the bots at bay.
Ease of use
Easy for People.
Hard for Bots
Purposefully designed. And actively aware. reCAPTCHA knows when to be easy on people and hard on bots. Our easy CAPTCHAs are a breeze for legitimate users.
Accessibility Option - Safe & Sound
For the visually impaired, reCAPTCHA provides an audio CAPTCHA option. Your legitimate users will find our regular audio CAPTCHAs easy to solve. Bots on the other hand will get a much harder audio CAPTCHA designed to block them.
Try it!Creation of Value
Help everyone, everywhere - One CAPTCHA at a time.
Millions of CAPTCHAs are solved by people every day. reCAPTCHA makes positive use of this human effort by channeling the time spent solving CAPTCHAs into digitizing text, annotating images, building machine learning datasets. This in turn helps preserve books, improve maps, and solve hard AI problems.
Stop a bot.
Improve a map.
reCAPTCHA improves our knowledge of the physical world by creating CAPTCHAs out of text visible on Street View imagery. As people verify the text in these CAPTCHAs, this information is used to make Google Maps more precise and complete. So if you're a Google Maps user, your experience (and everyone else's) will be even better.
Stop a bot.
Build a bot.
reCAPTCHA helps solve hard problems in Artificial Intelligence. High quality human labelled images are compiled into datasets that can be used to train Machine Learning systems. Research communities benefit from such efforts that help build the next generation of groundbreaking Artificial Intelligence solutions.
Stop a bot.
Save a book.
reCAPTCHA digitizes books by turning words that cannot be read by computers into CAPTCHAs for people to solve. Word by word, a book is digitized and preserved online for people to find and read.