Top notch product to run quick user research! I like to create prototypes on Figma or ProtoPie and send them to my target group of interest via Facebook Groups. It always brings enough results to take design decisions. I have not tried the Participant Finder, for me as an individual designer its expensive but for a company it would make total sense with its amazing filtering and targeting system. Great work!
I recently had a disappointing experience with Useberry. After launching a study through Useberry powered by Prolific, I discovered that I could neither reject nor approve participants' submissions directly—features that are readily available on Prolific itself. Additionally, Useberry does not support participant screening questions, further limiting control over the quality of participant responses. Despite reaching out to their support, the available solutions—using custom blocklists or allowlists for future studies—didn't resolve my immediate issue. Overall, this lack of flexibility was frustrating, particularly as it relies on a third-party service that inherently supports these essential participant management options.
