Amazon Mechanical Turk vs UserTesting: What are the differences?

Amazon Mechanical Turk: Programatically access thousands of high quality, low cost, global, on-demand workers. Amazon Mechanical Turk is a marketplace for work that requires human intelligence. The Mechanical Turk web service enables companies to programmatically access this marketplace and a diverse, on-demand workforce. Developers can leverage this service to build human intelligence directly into their applications; UserTesting: Get videos of real people speaking their thoughts as they use your website or mobile app. UserTesting provides on-demand usability testing. You create the test and we’ll get the testers. We let you “look over the shoulder” of your target audience while they use your website, so you can see and hear where users get stuck and why they leave.

Amazon Mechanical Turk belongs to "Crowdsourced Labor" category of the tech stack, while UserTesting can be primarily classified under "User Feedback as a Service".

Some of the features offered by Amazon Mechanical Turk are:

• Tag objects found in an image for easier searching / advertising targeting
• Select from a set of images the best picture to represent a product
• Audit user-uploaded images for inappropriate content

On the other hand, UserTesting provides the following key features:

• Video of the True User Experience
• Clips, Notes, & Sharing
• Detailed metrics