| What it does | WordPress page builder that saves ordinary blocks and loads only the CSS each page uses
| Post-Quantum Encryption & Zero-Knowledge Vault for WordPress
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| Stage | Not given
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| Founded | 2015
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| Based in | GB
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| Pricing model | Freemium
| Freemium
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| Pricing | The plugin is free with no time limit. Page Builder Sandwich Pro is a yearly or monthly plan for 1 site, 5 sites or unlimited sites, each with a 14-day free trial and no card needed.
| ZubQuant Free is available at no cost on WordPress.org. ZubQuant Pro Enterprise Suite is $49.
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| Key features | - Pages saved as ordinary WordPress blocks, no shortcodes
- Sandwich Studio: full-screen editor with layers, undo history and a command palette
- 44 free blocks and 68 more in Pro
- 20 free website kits and 8 more in Pro, plus section patterns
- Only the CSS each page uses, from your own site
- Accessibility checker for alternative text and colour contrast
- Site design panel in step with your theme's theme.json
- MCP server with 150 tools for Claude, ChatGPT and Cursor
- Forms, popups and A/B tests in Pro
- Theme builder, dynamic content and query loops in Pro
- WooCommerce store builder in Pro
- Imports from Elementor, Divi, Beaver Builder, WPBakery and Figma in Pro
| - Post-quantum encryption with NIST FIPS 203 ML-KEM-768 lattice cryptography and X25519
- Zero-knowledge server vault where the server cannot decrypt stored data
- Auto-protection for Contact Form 7, WPForms, Elementor, Ninja Forms, and Fluent Forms
- Admin Secret & API Key Vault with in-browser decryption
- Emergency Recovery Kit with offline secure backup
- WooCommerce Order PII Sealing and GDPR Auto-Scrubbing (Pro)
- Quantum-Sealed File & Document Drop-Box (Pro)
- Multi-Admin Team Access & Revocable Key Envelopes (Pro)
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| What makes it different | - No lock-in: switched off, every page still shows its content
- +0.5 kB and 0 outside requests on a measured test page
- Accessibility checker in the free plugin
- Neutral class names and no generator tags on the front end
- Every Pro plan has a 14-day free trial with no card
| - Only plugin using NIST-standardized post-quantum cryptography (ML-KEM-768) for WordPress forms and passwords
- 60-second guided setup requiring no cryptography knowledge
- 100% Pure PHP 8.1+ with zero impact on normal page views
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| Community votes | 3 | 0 |
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| DR (Domain Rating by Ahrefs) | 78 ● no change since last check | 3 ● no change since last check |
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| Trust Flow (Majestic) | 51 | 5 |
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| Citation Flow (Majestic) | 41 | 14 |
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| Referring domains (Majestic) | 4471 | 5 |
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| Domain Authority (Moz) | 36 | Not checked yet |
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| Page Authority (Moz) | 58 | Not checked yet |
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| Spam Score (Moz) | 1% | Not checked yet |
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Page Builder Sandwich
ZubQuant