We do a lot of surveys that require advanced functionality. We use SurveyGizmo. We tried out 5 or 6 tools, including MailChimp. If you want to do beyond what Typeform, Google Forms, or MailChimp can do, SurveyGizmo is great. Their customer experience is incredible. Even before we were a paying customer we could email over the weekend with a problem and their engineers would fix it by Monday.
Founder & CEO - SquarePeg
SurveyGizmo provides the most professional bang for your buck, and their service team is amazing.
Director of Operations - Inxent, Inc.
SurveyGizmo is an advanced (but easy to use) online survey software tool, empower business professionals to make informed decisions.
Visit the website: http://www.surveygizmo.com/