UserBob is described as 'Discount remote user testing service. The most affordable way to get unbiased feedback from users as they use your website. Ask users to perform certain tasks on your site while they record their screen and voice. Pick users from your site's demographics' and is an website. There are more than 25 alternatives to UserBob, not only websites but also apps for a variety of platforms, including Mac, Windows, iPhone and Android apps. The best UserBob alternative is UserTesting.com. It's not free, so if you're looking for a free alternative, you could try Ween.ai or UXtweak. Other great sites and apps similar to UserBob are UserPeek, AppCrush.net, userinput.io and 99tests.com.
Submit your website/app to Usability Testing Exchange (UTX), then some people will do Usability Testing of it, and send you thoughts and feedback. Instead of paying, you help someone else, in exchange.
