SurveyMonkey is a public company with millions of users. It focuses on surveys, and is one of the more expensive options out there. On the plus side you do get access to good insight tools.

Is SurveyMonkey the right option for non-survey forms? Is the price worth it?
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FormCrafts was founded in 2013, and is still actively run by the founding team. FormCrafts' mission is to allow users to create well-designed forms with an easy interface.

Unlike most competitors, FormCrafts has not raised any capital and remains bootstrapped. FormCrafts is a good SurveyMonkey alternative.
FormCrafts SurveyMonkey

Features

Conditional Logic
Calculations
Doesn't support live calculations
Multi Page Forms
Accept Payments
Save and Resume
Page-by-page
Popup Embed

Fields

Autocomplete
Image Checkbox
Tabular Input
Survey Fields
Star, Smiley, and Thumb Rating
Star Rating
Product Showcase

Analytics

Views / Responses
Completion Time
Field Insights