Quick Verdict
Choose Happyforms if...
Non-technical site owners who want a friendly form-building experience with live preview and solid email marketing integrations.
Choose Kadence Blocks Forms if...
Existing Kadence Blocks users who need simple-to-moderate forms without installing a separate plugin.
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 | Happyforms | Kadence Blocks 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 | Happyforms | Kadence Blocks Forms | Ninja Forms |
|---|---|---|---|
| Free Version | ✓Free | ✓Free | ✓Free |
| Starting Price | $49/year | $119/year | $99/year |
| Top Tier | Business: $149/year | Ultimate Bundle: $299/year | Elite: $499/year |
| Lifetime Deal | ✗ | From $899 | ✗ |
Integrations
Email Marketing
| activecampaign | ✓ | ✓ | ✓ |
| aweber | ✓ | ✓ | ✓ |
| brevo | ✓ | ✗ | ✗ |
| campaign monitor | ✗ | ✗ | ✓ |
| constant contact | ✓ | ✗ | ✓ |
| convertkit | ✓ | ✓ | ✗ |
| mailchimp | ✓ | ✓ | ✓ |
| mailerlite | ✓ | ✗ | ✗ |
| mailpoet | ✓ | ✗ | ✗ |
| sendfox | ✓ | ✗ | ✗ |
| sendgrid | ✓ | ✗ | ✗ |
Payment
| paypal | ✓ | ✗ | ✓ |
| stripe | ✓ | ✗ | ✓ |
CRM
| hubspot | ✗ | ✓ | ✓ |
| salesforce | ✗ | ✗ | ✓ |
| zoho | ✗ | ✗ | ✓ |
Automation
| integrately | ✓ | ✗ | ✗ |
| make | ✓ | ✗ | ✓ |
| webhooks | ✗ | ✓ | ✗ |
| zapier | ✓ | ✓ | ✓ |
Other
| google analytics | ✓ | ✗ | ✗ |
| google sheets | ✗ | ✓ | ✓ |
| recaptcha | ✓ | ✗ | ✗ |
| slack | ✗ | ✗ | ✓ |
| twilio | ✗ | ✗ | ✓ |
Pros & Cons
Happyforms
Pros
- ✓Unique live-preview building experience via WordPress Customizer
- ✓Wide email marketing integration (10+ providers)
- ✓Payments (Stripe + PayPal) and signatures included in Pro
- ✓Save and Resume feature for long forms
- ✓Friendly pricing starting at $49/yr
Cons
- ✗No calculated fields, user registration, or quizzes
- ✗No webhooks
- ✗No hCaptcha or Turnstile (only reCAPTCHA)
- ✗Smaller install base (20K) vs. major competitors
- ✗Customizer-based workflow may feel dated vs. Gutenberg-native approach
Kadence Blocks Forms
Pros
- ✓Seamlessly integrated within Gutenberg page building (no context switching)
- ✓400K+ install base gives confidence in stability and updates
- ✓Clean, well-styled forms that match theme design by default
- ✓Free tier handles basic form needs without any add-ons
- ✓Strong page builder integration
Cons
- ✗No multi-step forms, payments, calculated fields, user registration, surveys, or quizzes
- ✗Forms are secondary to the page building purpose — not a dedicated form solution
- ✗Limited integrations compared to dedicated form plugins
- ✗Pro adds good features but at $119+/yr for a form module feels expensive
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