Choosing between Spectra and Kadence Blocks comes down to a few specific needs: how many free blocks you want out of the box, how much you care about AI-assisted design, and how far your budget stretches into the Pro tiers. Both are solid Gutenberg block plugins, but they’re built around different priorities.
Spectra, a Gutenberg block plugin by Brainstorm Force with over 1 million active installs on WordPress.org, focuses on a generous free block library, full-site kit imports, and a lighter DOM footprint. Kadence Blocks, developed by Kadence WP (a StellarWP brand) with 600,000+ active installs, leans toward design flexibility and a more complete AI-powered site generation experience at the Pro tier. And Nexter Blocks, a Gutenberg block plugin by POSIMYTH with 10,000+ active installs, provides 90+ blocks, 50+ site extensions, and an ultra-light theme in one integrated plan.
This guide compares Spectra vs Kadence Blocks across seven key parameters, including block count, performance, AI features, pricing, and templates, to help you choose the right plugin for your next WordPress build. This guide is for WordPress developers, designers, and site owners evaluating Gutenberg block plugins in 2026.
What Is Spectra?
Spectra (by Brainstorm Force, the team behind the Astra theme) is a free Gutenberg block plugin with over 1 million active installs on WordPress.org. A major 2026 update expanded its free block library to 30+ blocks and introduced starter template kits: a single-click import that pulls in a complete, multi-page website design including Home, About, Services, and Blog pages, styled and pre-populated.
Spectra’s block markup is lean. Testing the same block type on both plugins shows Spectra generates fewer DOM elements than Kadence, which contributes to faster page rendering on shared hosting. The Pro version adds 4+ additional Pro blocks and AI-powered design assistance via the ZipWP integration. Check wpspectra.com/pricing/ for current plan rates.
Spectra works with any WordPress theme and does not lock you into the Brainstorm Force ecosystem. Users who want more blocks without a Pro subscription will find Spectra’s free tier more complete than Kadence’s.
Pros and Cons of Spectra
Pros
- 30+ free blocks (Free): More free blocks than Kadence Blocks’ 20+ free tier, covering Container, Heading, Post Timeline, Image Gallery, and more without a Pro upgrade.
- Starter template kits (Free + Pro): Import complete multi-page website designs in one click. Kadence Blocks free tier does not match this feature.
- Smaller DOM output: Spectra renders fewer HTML elements per block than Kadence, helping pages stay lighter on budget hosting.
- Affordable Pro entry (Pro): Spectra Pro is priced below Kadence Blocks Pro’s standalone $119/year entry, with multiple plans available at wpspectra.com/pricing/.
Cons
- No Mega Menu or advanced builders (Free): Spectra’s free tier lacks Mega Menu, Dynamic Listing, and custom Loop Skin blocks that power users need for complex sites.
- Spectra AI is patterns only: The ZipWP integration generates patterns and individual page layouts, not full multi-page site kits the way Kadence AI does.
- Fewer Pro blocks: Only 4+ Pro blocks in Spectra vs 12+ in Kadence Blocks Pro, so Pro users get less additional functionality at the plugin level.
Want to learn more about its Pros and Cons? Here’s a detailed review of Spectra.
What Is Kadence Blocks?
Kadence Blocks (by Kadence WP, now part of StellarWP) is a free Gutenberg block plugin with 600,000+ active installs on WordPress.org. The free version ships with 20+ blocks that focus on design quality and styling depth. The Row Layout container block, in particular, gives more granular column control than Spectra’s Container block, making it a favorite for developers who want pixel-level layout precision.
Kadence Blocks Pro ($119/year, up to 5 sites) upgrades the library with 10+ additional blocks including Advanced Slider, Image Overlay, Modal, Split Content, and Video Popup. Kadence AI is included in all paid plans via AI credits: at the Pro level it powers inline text editing and an AI-assisted design library with 400+ patterns. Full AI-generated site kits are available across all Pro tiers using the included AI credits.
Kadence Blocks integrates most deeply with Kadence Theme, but it also functions with other themes. Users who want full-site AI generation get the most value from the Full Bundle, which includes Kadence Theme Pro, all Kadence plugins, and Kadence AI in a single subscription.
Pros and Cons of Kadence Blocks
Pros
- Deep design controls (Free + Pro): The Row Layout block and per-block styling options give more granular design control than Spectra’s equivalent blocks.
- AI included in all paid plans (Pro): Kadence AI covers inline text editing, AI-assisted design library patterns, and AI site kit generation, all available with AI credits included in every paid tier.
- 10+ Pro blocks (Pro): More additional blocks than Spectra’s Pro tier, including Advanced Slider, Modal, Image Overlay, and Split Content for advanced layout work.
- Up to 5 sites at $119/year: Standalone Kadence Blocks Pro covers up to 5 sites. Bundle plans (Plus $169/yr, Ultimate $299/yr) cover up to 10 and 25 sites respectively.
Cons
- Fewer free blocks: Around 20 free blocks vs Spectra’s 30+, which means you hit the Pro upgrade wall sooner on complex free builds.
- Higher Pro entry price: Standalone Blocks Pro starts at $119/year for up to 5 sites. Spectra Pro is cheaper at the single-site level, making Kadence the pricier entry for users who need only 1 site.
- Larger DOM output: Kadence blocks generate more DOM elements than Spectra’s equivalent blocks, which can affect page performance on slower hosting.
Want to learn more about its Pros and Cons? Here’s a detailed review of Kadence Blocks.
Spectra vs Kadence Blocks: 7 Key Feature Comparisons
Spectra leads on free block count and DOM performance. Kadence leads on Pro design flexibility and AI-powered site generation. Nexter Blocks surpasses both on total block count (90+), extension depth (50+), and bundled value at every price tier. Here is the full side-by-side comparison.
| FEATURES | Nexter Blocks | Spectra | Kadence Blocks | Stackable | Greenshift | Essential Blocks | Crocoblock |
|---|---|---|---|---|---|---|---|
| Total Blocks | 90+ | 25+ | 15+ | 40+ | 100+ | 70+ | 60+ |
| Total Extensions | 15+ | 3 | - | - | - | - | - |
| Blog Builder | Yes | - | - | - | Limited | Limited | - |
| Advanced Data Table | Yes | - | Limited | - | (Limited, Only Comparison Table Block) | Yes | Yes |
| Popup Builder/Off Canvas | Yes | Limited | Limited | (Limited, Only Video Popup Block) | (Limited, Simple Popup Builder with Button Trigger) | Yes | (Limited, Requires separate JetPopup plugin) |
| Dynamic Listing | Yes | - | Limited | Yes | Yes | Limited | Yes |
| Custom Loop Skin | Yes | - | - | Yes | - | - | - |
| Vertical & Horizontal Mega Menu | Yes | - | - | - | Limited | Limited | (Limited, Requires separate JetMenu plugin) |
| Dark Mode | Yes | - | - | - | Yes | - | - |
| Cross Domain Copy and Paste | Yes | - | - | (Limited, Only includes Copy-Paste Styles) | Limited | Limited | - |
| Live Ajax Search | Yes | - | - | - | Yes | - | (Limited, Requires separate JetSearch plugin) |
| Header & Footer Builder | Yes | Limited | - | Yes | - | - | (Limited, Requires separate JetThemeCore plugin) |
| Carousel Anything & Remote | Yes | Limited | Limited | Yes | Yes | Limited | Yes |
| Login/Signup Form | Yes (Contains Password Reset too) | Yes | - | - | (Limited, Only Login Form Block) | - | (Limited, Requires separate JetFormBuilder and JetWooBuilder plugin) |
| Advanced Row Background | Yes | - | Yes | Limited | - | Limited | - |
| Code Snippets & Hooks | Yes | - | - | - | Limited | - | - |
| Advance Theme Builder | Yes | Limited | - | - | - | - | (Limited, Requires separate JetThemeCore plugin) |
| Social Reviews | Yes (Includes Facebook & Google Reviews) | - | - | - | - | - | - |
| Social Feeds | Yes (Includes Facebook, Instagram, YouTube, Vimeo & Multi Social) | - | - | - | - | (Limited, Only Instagram feed) | - |
| Scroll Sequence | Yes | - | Limited | (Limited, Only included Motion Effects) | (Limited, Only Background Parallax Block) | - | - |
| Form Styler | Yes | Yes | Yes | - | - | Yes | (Limited, Requires separate JetFormBuilder plugin) |
| Advanced Display Conditions | Yes | Limited | Limited | Yes | Limited | - | Limited |
| White-label Plugin | Yes | - | - | - | Yes | - | - |
A note on the table: Spectra’s free block count reflects the updated 2026 library (30+ free blocks, verified May 2026). Kadence column reflects the free tier. Nexter Blocks’ Free tier covers unlimited sites with no per-site limit, and all paid plans include Nexter Blocks, Nexter Extension, and Nexter Theme in one subscription. Features and pricing verified May 2026.
Comparing Spectra against another Gutenberg plugin? Here’s the full Spectra vs Greenshift feature comparison.
Spectra vs Kadence Blocks: Performance Comparison
Performance in Gutenberg block plugins depends on three factors: DOM size (how many HTML elements each block generates), script loading strategy, and asset management (whether unused block styles load on every page regardless of which blocks are used).
Testing the same block type on both plugins shows a measurable difference in DOM output. Spectra’s Info Box block renders approximately 19 DOM elements, while Kadence’s equivalent block renders around 29. Fewer DOM nodes mean less browser work per page, which contributes to better Largest Contentful Paint (LCP) scores on pages with multiple blocks. Spectra has a clear performance edge in this area.
Both plugins have moved toward conditional style loading in recent versions, meaning block styles only load when the block is actually used on a page. This is an improvement over older approaches that loaded all block CSS globally. Kadence has made progress here in recent releases, but Spectra’s leaner markup still gives it the advantage on raw page weight.
Nexter Blocks approaches performance differently. Its smart asset delivery system loads exactly 1 CSS file + 1 JS file per page, regardless of how many blocks are in use. The plugin runs on zero jQuery. On a typical page with 10-15 blocks, Nexter’s asset footprint stays flat while other plugins scale their output with each additional block. Tested on WordPress 6.9 with Nexter Blocks v4.7.2. You can explore the full 50+ Nexter Extension features including the performance optimization suite.
Spectra AI vs Kadence AI: Which Has Better AI Features?
Both Spectra and Kadence Blocks now include AI integrations, but they work very differently in scope and output. Here is what each offers in practice.
Spectra AI (Powered by ZipWP)
Spectra connects to ZipWP for AI-assisted design. From inside the Gutenberg editor, you can generate patterns and page layouts based on prompts, industry type, and style preferences. Generated templates appear directly in Spectra’s design library, ready to import into any page. The process is straightforward and works well for quickly populating sections without starting from scratch.
The limitation is scope: ZipWP generates individual patterns and single-page layouts, not full multi-page site kits. If you need AI to build out an entire website in one session, Spectra AI falls short of what Kadence AI delivers.
Kadence AI
Kadence AI integrates directly into the WordPress dashboard during site setup. It asks for your business type, brand colors, fonts, and content prompts, then generates a complete site kit covering every page (Home, About, Services, Contact) styled and populated with contextually relevant content. This is the most complete AI site generation available in any Gutenberg block plugin today.
Kadence AI is included in all paid plans via AI credits: 1,250 credits/year on the Express plan ($69/yr), up to 8,000 credits/year on the Ultimate plan ($299/yr). The standalone Kadence Blocks Pro ($119/yr) also includes AI credits for the design library and inline text editing. Full-site AI kit generation consumes more credits, so higher-tier plans give you more capacity for AI-heavy workflows.
Verdict: Kadence AI produces more complete output for site builds (full site kits vs patterns only). Spectra AI is more accessible but limited to sections and pages. Both require a paid plan for AI features. If complete AI-generated site builds are your priority, Kadence leads this category.
For reference: Nexter Blocks added AI capabilities across all 90+ blocks in January 2026, including AI content and image generation inside the block editor directly. AI features are available from the Starter plan, without requiring a bundle upgrade. Check Nexter pricing for current plan rates.
Spectra vs Kadence Blocks Pricing: Which Is More Affordable?
Both plugins are free on WordPress.org. The cost difference shows up at the Pro tier, depending on what features you actually need. Prices verified May 2026: confirm current rates at each plugin’s official site before purchasing.
Spectra paid plans:
- Spectra Pro: entry plan with all Pro blocks, Dynamic Content, Loop Builder, and Spectra AI access
- Essential Toolkit: Spectra Pro + premium Astra theme + website templates, one bundle
- Business Toolkit: full product suite for agencies and power users
- Lifetime options: available for each tier at wpspectra.com. Pricing varies by site count, check wpspectra.com/pricing/ for current rates.
Kadence Blocks pricing:
- Kadence Blocks Pro (up to 5 sites): $119/year: 10+ Pro blocks, dynamic content, conditional display, and AI credits for inline editing and design library patterns
- Bundle plans: starting from $69/yr, include Kadence Theme Pro, Blocks Pro, Kadence AI credits, and additional plugins across increasing site counts
For comparison, Nexter Blocks is free for unlimited sites. Paid plans include Nexter Blocks, Nexter Extension (50+ site extensions), and Nexter Theme in every tier. Check nexterwp.com/pricing for current rates (promotional pricing available):
- Starter (1 site): Nexter Blocks + Nexter Extension + Nexter Theme, billed yearly
- Professional (5 sites): all products across 5 sites
- Studio (unlimited sites): all products, unlimited sites, yearly or lifetime options available
The value gap is clear at every tier: Spectra’s entry plan covers Pro blocks only. Nexter Blocks at any paid tier bundles 90+ blocks, 50+ site management extensions (security, performance, SMTP, fonts, code snippets), and an ultra-lightweight theme together. See the full breakdown at Nexter pricing or compare Nexter free vs pro.
Template Libraries: Spectra vs Kadence Blocks
Starter templates help you build faster by giving you pre-designed sections, pages, and full-site layouts to work from instead of a blank canvas. Here is what each plugin offers.
Spectra includes Patterns, Pages, and Kits in its design library. Kits are the standout: a single import that pulls in a complete multi-page website design. Spectra’s library includes industry-specific kits for portfolios, agencies, local businesses, and e-commerce, and the library expands further with the Pro version. For teams that build new sites frequently, kit imports represent a real time saving.
Kadence Blocks ships with Patterns, Page templates, and Kadence AI-generated templates in its design library. The AI-generated templates are the differentiator: through Kadence AI, you can generate personalized, brand-matched templates from inside the dashboard. However, as noted in the AI section above, AI-generated templates consume AI credits included in all paid plans, with higher credit allocations in higher tiers.
For teams who want a larger, cross-builder template library independent of either plugin: WDesignKit offers 1,000+ professionally designed templates that work with Gutenberg, Elementor, and Bricks. WDesignKit templates are designed to pair with Nexter Blocks for a complete Gutenberg production workflow, with one-click import and cloud team collaboration included.
Looking for a complete Kadence vs another competitor breakdown? Here’s the Kadence Blocks vs Essential Blocks comparison.
Why We Recommend Using Nexter Blocks?
If you want more than either Spectra or Kadence Blocks offers without paying for a high-cost bundle, Nexter Blocks covers the gap. Spectra gives you more free blocks than Kadence, and Kadence gives you deeper Pro design controls than Spectra. But neither replaces the need for separate security, performance, SMTP, and admin plugins. Nexter Blocks bundles all of that: 90+ Gutenberg blocks plus 50+ site extensions for security, performance, fonts, code snippets, and admin tools, all in one plugin, with an ultra-light theme included in every paid plan.
Depending on your business, website, and the features you’re looking for, you might be looking for different Gutenberg blocks. Besides, your budget and affordability are also important factors in this decision.
However, when choosing the right Gutenberg blocks, you must consider certain factors to ensure a smooth experience. These include ease of use, premium customer support that extends beyond phone and chat support, flexibility, security, and so on.
Check 90+ Gutenberg Blocks Library from Nexter Blocks
Nexter Blocks brings you all these features and more in a single plugin. It is easy to install and use, you can enjoy hands-on support, and the plugin offers you possibly every unique function you need to create a stunning website.
And the best part? The blocks are highly customizable, and you don’t need to know coding to use them for your website.
Extra Resources
Nexter Official Website
Check 90+ Gutenberg Blocks Library
Get Premium Plan – Yearly & Lifetime (Both available)
Join our Facebook Community – Ask all your WordPress questions
Subscribe for Product Updates, Elementor News, Tips & More
Stay updated with Helpful WordPress Tips, Insider Insights, and Exclusive Updates – Subscribe now to keep up with Everything Happening on WordPress!
Wrapping Up: Which Should You Choose, Spectra or Kadence Blocks?
Spectra vs Kadence Blocks is not a straightforward winner situation: each plugin fits a different type of builder and budget. Here is the clearest decision guide based on the comparisons above.
- Choose Spectra if you want more free blocks out of the box (30+ vs 20+), care about DOM performance and page weight, or need an affordable entry into Pro Gutenberg blocks. Also the better choice if starter template kit imports are part of your client workflow.
- Choose Kadence Blocks if you need granular design controls for complex layouts, already work within the Kadence theme ecosystem, or want Kadence AI for full-site generation. Kadence Blocks Pro at $119/year covers up to 5 sites; bundle plans start at $69/year with AI credits included.
- Choose Nexter Blocks if you want 90+ blocks, 50+ site management extensions, and an ultra-light theme in one plugin, free for unlimited sites. Any paid plan adds the full feature set including AI across all blocks, bundled with Nexter Extension and Nexter Theme. Check Nexter pricing for current rates.
For WordPress developers who build sites regularly, Nexter Blocks delivers more combined value than either Spectra or Kadence at the same price point. Try the free plan first, or compare full features at Nexter free vs pro before committing to a paid tier. Nexter is built for WordPress beginners and experienced developers alike.
Get Exclusive WordPress Tips, Tricks and Resources Delivered Straight to Your Inbox!
Subscribe to stay updated with everything happening on WordPress.
