SurveyMonkey is the world's leading online survey platform, but it is complicated and expensive.
Autopilot has the ability to create "Capture forms" which can act as surveys. You can then send those responses to yourself via Slack, SMS, and analyse the responses in ledger form, reports, and advanced graphs.
Autopilot also allows you to have automated survey follow ups and segment your customers into audiences based on their survey response.
Kissmetrics is a person-based analytics package that makes it easy to track events and funnels online helping you focus on the important bits of your online business. Autopilot has this same capability and is an alternative to Kissmetrics.