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Booster AI SEO + AEO Optimizer vs SEO King (2026): which should you pick?

As of Oct 24, 2026, we pick SEO King: it is second in our ranking of SEO plugins and apps, and it grades higher too, 2.6 against 2.2.

Checked Oct 23, 2026 · graded Oct 23, 2026 by ToolGPA

SEO King grades higher on value for money and the free plan. They get the same grade on features, ease of use and platforms.

Price, platforms and features side by side. The table says where each price was read and when.

Booster AI SEO + AEO Optimizer

Shopify app that audits and fixes store SEO and compresses images

Free plan · from $39/mo

SEO King

Shopify SEO app with unlimited AI meta text and image optimization

Free plan · from $9.99/mo

Which one is for you

Pick Booster AI SEO + AEO Optimizer if

  • Fits if you run a Shopify store and want SEO fixes applied across every product
  • Works for stores with big catalogs that are missing alt text

Look elsewhere if

  • Tight if you stay free, as it mostly detects problems; meta templates and fixes need Pro at $39 a month
  • Pricey if you want image compression or Search Console data, which need Premium at $69 a month
  • Watch out: charges come every 30 days through Shopify unless you pay $349 or $619 for the year
  • Skip it if your store isn't on Shopify, as it runs nowhere else

Pick SEO King if

  • Fits if you run a Shopify store and want AI meta text without counting credits
  • Works for large catalogs, since 20,000 pages is $16.99 a month

Look elsewhere if

  • Skip it if your store isn't on Shopify, as that's the only place it installs
  • Tight if you stay free, because AI text, bulk photo work, robots.txt and llms.txt are all paid
  • Watch out: alt text read from the photo itself is about $1 per 400 photos, and translation and upscaling also use prepaid credits
  • Pricey if you want it done for you, as the Full-Service tier is $95 a month or $595 a year, with no theme work

How we grade them

2.2GPABooster AI SEO + AEO OptimizerFair2.6GPASEO KingGood
Value for money
DPro is $39 a month, inside this category's dearest tenth (from $33.25), or $349 a year, about $29.08 a month. Image compression, URL keywords and Search Console data need Premium at $69 a month.
C$9.99 every 30 days for up to 500 pages, a little above the $8.25 where this category's cheaper quarter ends. Yearly billing brings it to $69.99, about $5.83 a month, and the 20,000-page tier is $16.99 a month. Vision AI and translation cost extra.
Free plan and trial
CA free plan with an SEO score, alt text templates, broken-link detection, manual audits and a weekly sync of 50 images. It finds problems but leaves most of the fixing to Pro.
BThe free basics have no stated cap: alt text, meta title and description edits, photo renaming and compression, a store scan and Search Console stats. A small store could run on that. What's missing is any AI text, bulk photo work, robots.txt and llms.txt.
Features
BAudits with automatic fixes, meta templates, alt text, broken-link fixes, JSON-LD, sitemap submission, llms.txt, image compression and a year of Search Console data. It covers the whole job, spread over two paid plans.
BStore scans with a fix checklist, image compression, JSON-LD with FAQ markup, image sitemaps, robots.txt and llms.txt, broken links and redirects, rank tracking and SEO text in 40+ languages. Nothing in the listing leaves a gap in the job; tiers differ only in pages covered.
Ease of use
CNo rating on record. It installs from the Shopify App Store, but meta tags and alt text run on templates you set, and the automatic fixes start on Pro.
CNo store rating on record. It installs from the Shopify App Store, but you connect Search Console, work through the checklist and choose what the AI rewrites and keeps updated.
Platforms and integrations
BWeb only, inside Shopify. It connects to Search Console and ChatGPT, and works with the review apps Judge.me, Loox, Okendo and Yotpo.
BWeb, inside the Shopify admin, with Google Search Console, Google Merchant Center, Easy Watermarks and Swap Photo Editor, and AI writing through MCP. No phone or desktop app, and nothing for stores off Shopify.
Best forautomatic SEO fixes for Shopify storesAI meta text on a Shopify store, priced by page count

The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Booster AI SEO + AEO Optimizer and SEO King. How we grade

Price against what you get

Booster AI SEO + AEO Optimizer starts at $39 a month and scores 2.7 out of 4 on features, ease of use and platforms. SEO King starts at $9.99 a month and scores 2.7.

They score the same, and SEO King starts $29.01 a month lower. Of the other SEO plugins and apps on the chart, 1 scores higher than Booster AI SEO + AEO Optimizer for less, and 1 scores higher than SEO King for less.

Features, ease of use and platforms, averaged

D1.0C2.0B3.0A4.0Free$2$5$10$20$50$100$200$500More for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessBooster AI SEO + AEO…SEO King

What paid plans start at, a month (each step along is roughly double) →

  • The best score at each price
  • Has a free plan
  • No free plan
The full chart of SEO plugins and apps, and the best at every price

Where they differ

  • Booster AI SEO + AEO Optimizer also covers reports and page speed.
  • SEO King also covers keyword research, rank tracking and content optimization.
In commonFree planWebAI featuresSite auditSchema markup

At a glance

Booster AI SEO + AEO OptimizerSEO King
PricingFree planFree plan
Starts at$39 per month, billed every 30 days$9.99 per month for up to 500 pages, billed every 30 days
Free planSEO score, alt text templates, broken-link detection, manual audits, a weekly sync of 50 images and weekly email reports.Free basics: unlimited alt text, meta title and meta description updates, photo renaming and optimization, a store scan, and Search Console and keyword analytics. No AI text.
Free trial14-day free trial on Pro and PremiumNone listed
Web
Made byBooster SEOEngage Apps
Price read fromapps.shopify.comapps.shopify.com
CheckedOct 23, 2026Oct 23, 2026

Worth knowing

Booster AI SEO + AEO Optimizer

  • Works only on Shopify stores; it is installed from the Shopify App Store.
  • Meta tag templates and automatic fixes need Pro at $39 a month; the free plan only detects and reports most issues.
  • Image compression, URL optimization and Search Console data need Premium at $69 a month.
  • Charges are billed in US dollars every 30 days through Shopify, or yearly at $349 or $619.

SEO King

  • Works only on Shopify stores; it is installed from the Shopify App Store.
  • AI text, auto-updating, bulk photo work, robots.txt, llms.txt and advanced JSON-LD all need a paid tier; tiers differ only in pages covered.
  • Vision AI, translation, upscaling and background removal are paid per use from prepaid credits, or by an optional unlimited AI credits plan.
  • A done-for-you Full-Service tier with expert setup and monthly strategy calls costs $95 a month or $595 a year, without theme work.

Key features

Booster AI SEO + AEO Optimizer

Automatic SEO fixes
Scans the store continuously and fixes the issues it finds without manual work; automatic fixes and monitoring start on Pro.
Meta tag templates
Pro optimizes meta titles and descriptions and applies custom templates to every meta tag, with AI-generated text as an option.
Image SEO and compression
Alt text templates on every plan; Premium compresses images (5 GB a month) and renames image files for search.
Broken links and redirects
Detects broken links and reports them on the free plan; Pro finds and fixes them automatically.
Structured data and AI search
Adds JSON-LD rich snippets, submits the sitemap to Google, and writes an llms.txt file so AI assistants can read the store.
Reports
Weekly email summaries on every plan; Premium adds 365 days of Google Search Console metrics, bulk actions and PDF reports.

SEO King

Unlimited AI meta text
Paid plans write meta titles, meta descriptions, alt text and product descriptions with GPT and Gemini models, with no credit limit, and can keep them updated.
Image optimization
Compresses, resizes, converts and renames photos without a meter. Vision AI alt text from the photo itself is pay-per-use, about $1 per 400 photos.
Store scan and SEO checklist
Scans the store for SEO issues on every plan and lists fixes in a checklist and dashboard; changes can be previewed before they go live.
JSON-LD, sitemaps and robots.txt
Advanced JSON-LD schemas including FAQ markup, image sitemaps, and robots.txt and llms.txt editing on paid plans.
Keywords and SERP rankings
Google Search Console stats and site keyword analytics on every plan, with SERP rank tracking and a page tracker in the app.
Links, redirects and translation
Finds broken links and 404 errors, manages redirects and URL rewriting, and writes SEO text in more than 40 languages.

Plans

Booster AI SEO + AEO Optimizer

  • Free$0

    SEO score and badge, alt text with custom templates, broken-link detection, manual audits, weekly sync of 50 images and 24/7 chat support.

  • Pro$39

    per month, billed every 30 days

    Adds meta title and description templates, automatic fixes and monitoring, rich snippets, sitemap submission and AI search features. $349 a year.

  • Premium$69

    per month, billed every 30 days

    Adds image compression (5 GB a month), URL keyword and image file name optimization, 365 days of Search Console data and PDF reports. $619 a year.

SEO King

  • Free basics$0

    Unlimited alt text, meta title and meta description updates, photo renaming and optimization, store scans and Search Console analytics.

  • 500 Pages$9.99

    per month for up to 500 pages, billed every 30 days

    All features: unlimited AI text, auto-updating, bulk photo optimization, the fast SEO editor, robots.txt, llms.txt and advanced JSON-LD.

  • 5,000 Pages$13.99

    per month for up to 5,000 pages, billed every 30 days

    The same features as 500 Pages, for stores with up to 5,000 pages.

  • 20,000 Pages$16.99

    per month for up to 20,000 pages, billed every 30 days

    The same features as 500 Pages, for stores with up to 20,000 pages.

Ways to pay less

Booster AI SEO + AEO Optimizer

  • Annual discount

    Save 25% with yearly billing

    The listing offers Pro at $349 a year and Premium at $619 a year, which it says saves 25% against paying monthly.

SEO King

  • Annual discount

    Save up to 52% with yearly billing

    The listing offers the 500-page tier at $69.99 a year (42% off), 5,000 pages at $79.99 (52%) and 20,000 pages at $99.99 (51%).

Common questions

Which is cheaper, Booster AI SEO + AEO Optimizer or SEO King?

As of Oct 23, 2026, SEO King is cheaper to start with: $9.99 a month, against $39 a month for Booster AI SEO + AEO Optimizer. Booster AI SEO + AEO Optimizer starts at $39 per month, billed every 30 days, and SEO King starts at $9.99 per month for up to 500 pages, billed every 30 days.

Which has a free plan, Booster AI SEO + AEO Optimizer or SEO King?

As of Oct 23, 2026, both Booster AI SEO + AEO Optimizer and SEO King have a free plan.

More comparisons

How this page was made

  • The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
  • The grades are our own, from each tool’s review or report card. The GPA is their average.
  • Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
  • The differences and the answers to the questions are worked out from those listings.
How we review and grade