As someone who has used a variety of form plugins for WordPress, I believe that Formidable Forms and Gravity Forms are among the best on the market. While I have also worked with Forminator, WP Forms, Contact Form 7 and others, I consider Formidable Forms and Gravity Forms to be the most complex form solutions for WordPress, enabling users to create much more than just a simple form.
The Level of Complexity
Both Formidable and Gravity are highly complex plugins, but in my opinion, Formidable comes out on top. Here are some reasons why:
- Advanced charts and graphs: Formidable allows users to create advanced charts and graphs from form submissions.
- Repeater fields: Formidable has the option of a repeater field (nested forms) which allows for more advanced and complex forms.
- Conversational forms: Conversational forms are a unique feature of Formidable, which provide a better user experience.
- Better UX: Formidable has better user experience and is more intuitive.
- Better styling options: Formidable has better styling options, without the need for CSS knowledge.

Formidable Forms UX
Pricing
When it comes to pricing, Formidable starts at $79 a year for the basic license, but there is usually a discount available. I personally have the highest license, which costs $599, but it is often discounted by 50%, which brings it down to $300. One huge advantage of Formidable is that its business model is freemium, so there is a free version available for download in the WordPress repository. Gravity, on the other hand, starts at $59 and the highest package costs $259 a year, which is a better overall price. When it comes to pricing, Gravity Forms wins, but the difference is not significant.

Pricing of Gravity Forms in 2023
Third-Party Extensions
Gravity Forms has a larger community, and there are more third-party add-ons available for it. However, these are mostly paid, so what a Formidable user gets included with the license (e.g., repeater fields), a Gravity Forms user has to pay for by purchasing a Gravity Wiz license. Gravity Wiz is a great addon that adds so many extensions that it’s worth taking a look.

Gravity Perks from Gravity WIZ
Conclusion
In conclusion, while Formidable is my personal preferred tool due to its complex functions and features, when considering complexity, price, and third-party add-ons, Gravity Forms is the winner in this comparison. Both are great plugins, and choosing between the two depends on the user’s specific needs and preferences.