Yes, our Managed Plan gives you the option to split tests into multiple iterations. You can run run one larger test, or split your testers into multiple iterations over time. You can design a new set of tasks / questions for each iteration, or you can simply run the same test with a different group of testers. The number of iterations you can run will be based on a quoted price, after a discussion with our team about your test goals.
Our Pro and Basic plans allow you to run multiple tests each month, so you can design your own split tests to match your goals.