What are some alternatives?
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
Pusher Push Notifications API - Send push notifications programmatically at scale
LimeSurvey - LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
Pingr - Get notified when it's important
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
PushOwl - Re-engage website visitors with push notifications