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a. Ability to add multiple questions to a single survey (it is shown as one question at a time to the user).
b. Ability to target these surveys on advanced parameters, like -
Referring websites (e.g show a survey only to visitors from Google).
Cookie, Browser and Platform based targeting.
URL pattern based targeting.
For "first time visitors only" targeting etc.
c. The aggregate response to each survey displays visual charts on survey performance, answers to the survey, user demography etc - these stats are comparable to best survey tools out there.Do give it a try - http://webengage.com. Look forward to your feedback.
We have done a small experiment with online surveys. We added the capability of, what we call as, "targeting" these surveys to specific visitors on your website. So, when you create a survey using WebEngage and want to display it to visitors on your website (via a WebEngage widget), we let you choose from a bunch of conditions. E.g. you can say, "this survey should only be displayed to visitors coming from Google search and staying on my home page for at least 30 seconds".
Have a look at a demo survey on http://webengage.com (please wait for 10 seconds for a survey to pop).