We have had good luck with both Survey Monkey and the survey tool built into Constant Contact

Survey Monkey or Polldaddy are a couple good options.

Survey Monkey is what I use. And a gazillion other companies use it. You don't have to reinvent the wheel on this one.
Don't stop taking massive action.
Best of Luck,
Michael T. Irvin
michaelirvin.net
My books are available exclusively through Amazon Books. Check out my book "Copywriting Blackbook of Secrets"
Copywriting, Startups, Internet Entrepreneur, Online Marketing, Making Money

There are a few different options worth checking out, including SurveyMonkey, SurveyGizmo, Typeform, Fieldboom and AskNicely.

Fieldbloom makes it easy to design beautiful surveys and online forms in less than 5 minutes.

You can analyze responses one-by-one and also tag them with labels, star them and mark them as read or unread (just like Gmail). You can also use the simple but powerful reports to understand trends in the feedback you’re receiving.

Here's the full list of survey options you can check out with pros and cons for each: http://www.fieldboom.com/blog/surveymonkey-competitors-alternatives/.