Saastic is a great tool for soliciting and collecting reviews. The gating functionality is clever and well implemented. Overall, the tool has all the features you might need.

I strongly recommend it! We are using SaaStic for collecting customer reviews and honestly, there is not much you can dislike about it. The interface is really easy-to-use, the setup is quick, it looks good, and it will do the job. What I want to highlight is their super prompt and helpful support. For instance, we wanted to implement Google Analytics and event tracking of review collection, and they launched it within a few days. I really appreciate this approach.