Kadence Blocks vs Spectra Legacy
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| Feature | Kadence Blocks v3.8.0.2 · checked 23 Oct 2026 Free + paid · ★ 4.8/5 Visit Details | Spectra Legacy v2.20.5 · checked 23 Oct 2026 Free + paid · ★ 4.7/5 Visit Details |
|---|---|---|
| At a glance | ||
| Active installs | 600,000+ | 1M+ |
| Last updated | October 22, 2026 | October 9, 2026 |
| Editions | Kadence Blocks · Kadence Blocks Pro ($) | Spectra Legacy · Spectra Legacy Pro ($) |
| Pros | Over 20 blocks with design controls inside the native editor; Advanced form block with MailerLite and captcha options; Free core plugin, with an optional separate Pro plugin | Large free set of content blocks for the block editor; Popup builder and starter template library included in the free code; Styling blocks for Contact Form 7 and Gravity Forms |
| Cons | Some blocks and features need Kadence Blocks Pro; Form integrations contact third-party services once configured; Prebuilt library and subscribe forms call kadencewp.com | Receives security and compatibility fixes only, with no new features; AI and template features depend on a credit-based ZipWP service |
| More features | ||
| Other features | Registers more than 20 custom blocks, such as accordion, tabs and advanced button, Advanced form block with AJAX submission and field sanitising, Captcha verification for Google reCAPTCHA, Cloudflare Turnstile and hCaptcha, Option to load Google Fonts locally and swap display, Google Maps block, Lottie animation and vector custom post types, Prebuilt design library REST endpoints, Built-in icon library used by icon and button blocks, Checks for a Kadence Blocks Pro licence key and product licence | Free content block library (post grid, FAQ, gallery, timeline and more), Popup builder with a spectra-popup post type, Styler blocks for Contact Form 7 and Gravity Forms, Block template library fetched from a remote templates server, AI content generation through Zip AI (credit-based), Google reCAPTCHA keys for form blocks, Upgrade prompts for Spectra Legacy Pro ($) |
| Integrations | ||
| MailerLite | — | |
| E-commerce | — | WooCommerce |
| Plugins | — | Contact Form 7, Gravity Forms |
| Other | Google reCAPTCHA, Cloudflare Turnstile, hCaptcha, Google Fonts | Google reCAPTCHA, ZipWP, Spectra credit server |
| Requires WordPress | 6.6 | 5.6 |
| Requires PHP | 7.4 | 7.4 |
| Tested up to | 7.1 | 7.1 |
| Phones home | Only if you agree | Only if you agree |
| External services | connect.mailerlite.com, api.mailerlite.com, www.kadencewp.com, plugins.svn.wordpress.org, licensing.nexcess.com, software.liquidweb.com, herald.nexcess.com, licensing.stellarwp.com, www.google.com, challenges.cloudflare.com, api.hcaptcha.com, js.hcaptcha.com, fonts.googleapis.com, telemetry.stellarwp.com, content.startertemplatecloud.com | api.zipwp.com, credits.startertemplates.com, app.zipwp.com, websitedemos.net, metrics.brainstormforce.com |
| Blocks | 60 | 17 |
| Shortcodes | — | 1 |