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.
Amplitude provides product analytics to help companies understand user behavior. Autopilot does all this, but better - dashboards, graphs, customer segmentation.
Most important, Autopilot shines as an alternative to Amplitude because you can take ACTION on your analysis: sending email campaigns, SMS, sending the right messages to customers at the right time.