What are the best ParticipAid alternatives in 2020?
ParticipAid is described as 'Online platform that allows researchers to recruit and engage participants for research studies' and is an website in the Education & Reference category. There are three alternatives to ParticipAid, not only websites but also apps for iPad and iPhone. The best alternative is Amazon Mechanical Turk. It's not free, so if you're looking for a free alternative, you could try Spare5.