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Top-level
 It really depends on the scale you are operating at. How useful is captcha to you, and what are you using it for? Just to defend login access? Or to defend every page against the scraping monsters that are currently out there? Are you protecting a storefront? 2 comments
I might recommend procaptcha. And they've got a bit of an estimator tool before you signup, so you can compare pricing. It's not exact, but not terrible. A lot fewer clients tend to have to solve puzzles. It copes, unless DDoS starts heading your way, then it falls over. |
Gregory's Server
@shaknais Just login/register pages, and some auth pages