Formstack vs NinjaForms

Here is a comparison between Online Form Builders products NinjaForms & Formstack.
The comparison details include features, reviews, ratings and pricing.

Product Name Formstack NinjaForms Gravity Forms
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Editor's Rating

80%

80%

80%

Website Website Website Website
Price US$39/mo US$0.00 US$39/yr
Review Read Read Read
Good

Offers the complete tool to build a good online form that helps to improve your conversion rate. With comprehensive A/B split testing, you can increase the effectiveness of your form over time.

Free to use, which you can download immediately and use it indefinitely on your WordPress site. There are various add-ons to choose from, and each add-on purchase is backed up by a 30-day money back guarantee.

Allows you to create unlimited forms with unlimited entries, with various available add-ons and spam protection features. It helps to simplify the creation of even complex forms for your WordPress website.

Bad

The Silver and Gold plans only offers limited features, with limited forms and form submissions. The full features are only available on the most expensive plan, with quite an expensive monthly price.

Provided to you as a downloadable zip file, which you need to install manually on your WordPress website. It is available only for WordPress site, and it is incompatible with any other web and content management platforms.

Can only be used in self-hosted WordPress installations, which means that you cannot use this software in any other web platforms. You need to renew the license of the software yearly if you want to keep receiving updates and support.

Overall

Formstack allows you to create smart web forms that help to improve your conversion rate.

The Ninja Forms software is an easy and flexible WordPress form builder software that is provided for you for free, with a catch: you have to pay for the add-ons that you are using with this form. It allows you to create any type of form for your WordPress website with ease, and you can use only the add-ons that you really need.

Gravity Forms is a WordPress form builder software that allows you to create unlimited forms with unlimited entries.

Video
Form Builder Features
Drag n Drop
Form Security
Themes
Responsive
Analytics
A/B Testing
API
Payment Integration 9 3
Confirmations
3rd Party Apps 45
Templates
Branch Forms
Form Rules
File Upload
Branding NA
Sub-domain NA NA
E-Signature
Field Validation
Deployment Cloud Self-hosted Self Hosted
Support Options 2 2 3
Free Trial 14 Days
Quick Overview
Market Strength 69 48 54
Feature Strength 75 65 55