In the web there has been a play of undeniably significant jobs in our day to day life, with the openness of many web admins, likewise, web creeps and e-mail. In any case, these are frequently imperiled by assaults from PC AIBots Programs. To handle these type of issues, CAPTCHA [Completely Automated Public Turing Test to Tell Computers and Humans Apart] was created to recognize Client AI- Bots projects and human users. In spite of the fact that these frame work offers great security and cutoff programs enrolled to the web admins and some CAPTCHA’s have a very few shortcomings which will permit these AI-Bot Programmers to penetrate the system of the CAPTCHA. This research work analysis the different CAPTCHA strategies and actualization with even bites the dust and RSA Classifications.