A breakdown of what customers have eventually migrated from to reCAPTCHA since 2011.

Legend

2011
2012
2013
2014
2015
Name 20112012201320142015201620172018 Total
Sweet Captcha 0 0 0 0 286 0 0 0 286
Are You a Human 0 0 0 0 166 0 0 0 166
Picatcha 0 0 0 16 44 0 0 0 60
KeyCAPTCHA 0 0 6 22 20 0 0 0 48
Hashcash 0 0 0 7 1 0 0 0 8
MintEye 0 0 0 0 1 0 0 0 1
Keypic 0 0 0 1 0 0 0 0 1

Customers that currently use related technologies that stopped using reCAPTCHA since 2011.

Legend

2011
2012
2013
2014
2015
Name 20112012201320142015201620172018 Total
Are You a Human 7 19 23 124 202 0 0 0 376
Sweet Captcha 1 1 14 73 79 0 0 0 168
KeyCAPTCHA 1 0 3 19 15 0 0 0 38
Picatcha 0 1 2 8 6 0 0 0 17
Hashcash 0 0 0 4 3 0 0 0 7
MintEye 0 0 0 1 0 0 0 0 1
Technology 20112012201320142015201620172018 Total
Sweet Captcha 0 0 0 0 207 0 0 0 207
Picatcha 0 0 0 8 38 0 0 0 46
KeyCAPTCHA 0 0 3 3 5 0 0 0 11
Hashcash 0 0 0 3 -2 0 0 0 1
Are You a Human 0 0 0 0 -36 0 0 0 -36