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reCAPTCHA Alternatives

reCAPTCHA Alternatives

reCAPTCHA

reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers and old time radio shows.

About 200 million CAPTCHAs are solved by humans around the world every day. In each case, roughly ten seconds of human time are being spent. Individually, that's not a lot of time, but in aggregate these little puzzles consume more than 150,000 hours of work each day. What if we could make positive use of this human effort? reCAPTCHA does exactly that by channeling the effort spent solving CAPTCHAs online into "reading" books.

To archive human knowledge and to make information more accessible to the world, multiple projects are currently digitizing physical books that were written before the computer age. The book pages are being photographically scanned, and then transformed into text using "Optical Character Recognition" (OCR). The transformation into text is useful because scanning a book produces images, which are difficult to store on small devices, expensive to download, and cannot be searched. The problem is that OCR is not perfect.

Best Free Personal reCAPTCHA Alternatives

Want another awesome reCAPTCHA alternative? Look no further. We researched the top alternatives and found several new reCAPTCHA alternatives that work with your platform or device. If you want even more options, we've also reviewed top reCAPTCHA-like software for your Mac, Windows PC, Android phone/tablet, Linux computer, or iPhone.

UniqPin

UniqPin

Free PersonalSelf-HostedJavaScriptPHP

UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect a human or a computer operate with it. Surpassing a CAPTCHA...

reCAPTCHA Reviews

Add your reviews & share your experience when using reCAPTCHA to the world. Your opinion will be useful to others who are looking for the best reCAPTCHA alternatives.

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