Quick Verdict
Choose Formidable Forms if...
Developers and agencies who need to turn form submissions into data-driven front-end applications — directories, job boards, real estate listings, etc.
Choose Gravity Forms if...
Developers and agencies building complex, data-driven forms who need calculated fields and a rich add-on ecosystem.
Choose Ninja Forms if...
WordPress users who want a free core and only need to pay for specific features as they grow.
Feature Comparison
| Feature | Formidable Forms | Gravity Forms | Ninja Forms |
|---|---|---|---|
| Drag & Drop Builder | ✓ | ✓ | ✓ |
| Conditional Logic | ✓ | ✓ | ✓ |
| Multi-Step Forms | ✓ | ✓ | ✓ |
| File Uploads | ✓ | ✓ | ✓ |
| Payment Forms | ✓ | ✓ | ✓ |
| Calculated Fields | ✓ | ✓ | ✓ |
| User Registration | ✓ | ✓ | ✓ |
| Frontend Post Submission | ✓ | ✓ | ✓ |
| Conversational Forms | ✓ | ✓ | ✗ |
| Gutenberg Block | ✓ | ✓ | ✓ |
| Gutenberg-Native | ✗ | ✗ | ✗ |
| AI Form Builder | ✓ | ✗ | ✗ |
| Digital Signatures | ✓ | ✓ | ✗ |
| Surveys & Polls | ✓ | ✓ | ✓ |
| Quizzes | ✓ | ✓ | ✓ |
| Scheduling / Date Limits | ✓ | ✓ | ✓ |
| Entry Management | ✓ | ✓ | ✓ |
| Export Entries | ✓ | ✓ | ✓ |
| Partial Entries | ✓ | ✓ | ✓ |
| Geolocation | ✓ | ✓ | ✗ |
| Webhooks | ✓ | ✓ | ✓ |
| Custom CSS | ✓ | ✓ | ✓ |
| Responsive Design | ✓ | ✓ | ✓ |
| Ajax Submission | ✓ | ✓ | ✓ |
| Anti-Spam | ✓ | ✓ | ✓ |
| reCAPTCHA | ✓ | ✓ | ✓ |
| hCaptcha | ✓ | ✓ | ✓ |
| Cloudflare Turnstile | ✓ | ✓ | ✓ |
| Honeypot | ✓ | ✓ | ✓ |
Pricing Comparison
| Plan | Formidable Forms | Gravity Forms | Ninja Forms |
|---|---|---|---|
| Free Version | ✓Free | ✗ | ✓Free |
| Starting Price | $39.5/year | $59/year | $99/year |
| Top Tier | Elite: $299.5/year | Nonprofit: $129/year | Elite: $499/year |
Integrations
Email Marketing
| activecampaign | ✓ | ✓ | ✓ |
| aweber | ✓ | ✓ | ✓ |
| campaign monitor | ✗ | ✓ | ✓ |
| constant contact | ✓ | ✓ | ✓ |
| convertkit | ✓ | ✗ | ✗ |
| drip | ✗ | ✓ | ✗ |
| getresponse | ✓ | ✗ | ✗ |
| hubspot | ✗ | ✓ | ✗ |
| mailchimp | ✓ | ✓ | ✓ |
| mailerlite | ✓ | ✗ | ✗ |
Payment
| 2checkout | ✗ | ✓ | ✗ |
| authorize net | ✗ | ✓ | ✗ |
| mollie | ✗ | ✓ | ✗ |
| paypal | ✓ | ✓ | ✓ |
| square | ✗ | ✓ | ✗ |
| stripe | ✓ | ✓ | ✓ |
| woocommerce | ✓ | ✗ | ✗ |
CRM
| hubspot | ✓ | ✓ | ✓ |
| salesforce | ✓ | ✓ | ✓ |
| zoho | ✓ | ✓ | ✓ |
Automation
| make | ✓ | ✓ | ✓ |
| uncanny automator | ✓ | ✗ | ✗ |
| zapier | ✓ | ✓ | ✓ |
Other
| dropbox | ✗ | ✓ | ✗ |
| google sheets | ✓ | ✓ | ✓ |
| rest api | ✗ | ✓ | ✗ |
| slack | ✓ | ✓ | ✓ |
| twilio | ✗ | ✗ | ✓ |
Pros & Cons
Formidable Forms
Pros
- ✓Unique Formidable Views feature turns entries into directories, calendars, and front-end apps
- ✓Calculated fields and complex formula support
- ✓Swiss Army Knife versatility — handles everything from simple forms to full web apps
- ✓Free version available on WordPress.org
- ✓Built-in survey tools rivaling SurveyMonkey
Cons
- ✗Most advanced features locked behind Business ($199.50/yr)
- ✗Steeper learning curve for the Views/app-builder features
- ✗CSS customization can be tricky without developer knowledge
- ✗No Gutenberg-native experience
- ✗Support quality can be inconsistent per user reviews
Gravity Forms
Pros
- ✓Calculated fields built into every plan (no add-on needed)
- ✓Best-in-class third-party ecosystem (GravityView, Gravity Perks, Gravity Flow)
- ✓All core form capabilities identical across plans — only add-ons differ
- ✓Strong REST API and developer hooks
- ✓Nonprofit pricing ($129/yr for Elite-level) is excellent
Cons
- ✗No free version or trial — requires upfront payment
- ✗Most advanced features (signatures, surveys, geolocation, webhooks) require Elite ($259/yr)
- ✗Third-party ecosystem can make total cost unpredictable
- ✗No AI form builder
- ✗Conversational forms only available at Elite tier ($259/yr)
- ✗Not Gutenberg-native; block merely embeds the classic builder
Ninja Forms
Pros
- ✓Free core plugin with genuinely useful features (calculated fields included free)
- ✓Calculated fields available in the free version — unlike most competitors
- ✓Modular add-on model lets you pay only for what you need
- ✓Good developer extensibility with hooks and filters
- ✓Easy drag-and-drop interface suitable for beginners
Cons
- ✗Add-on model gets expensive quickly if you need multiple features
- ✗Not Gutenberg-native (uses its own drag-and-drop builder)
- ✗No conversational forms or signatures
- ✗Heavy first-party scripts compared to Fluent Forms
- ✗Renewal pricing after first-year discount is a common complaint