Optimal Workshop is described as 'A User Research Platform that helps you and your team make design decisions with confidence' and is an website. There are more than 10 alternatives to Optimal Workshop, not only websites but also apps for a variety of platforms, including SaaS, iPad, Mac and Windows apps. The best Optimal Workshop alternative is ConfirmKit. It's not free, so if you're looking for a free alternative, you could try Proven By Users or UX Metrics. Other great sites and apps similar to Optimal Workshop are UserBit Research Repository, Dovetail, Handrail and QueryVeil.
Test an unlimited number of websites, ask an unlimited number of tasks or questions and invite 1000 users. Loop11 is the best available tool if you are wanting both qualitative and quantitative data from your test participants.
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