5,226 reviews and a 4.9-star average is a lot of merchants vouching for an app that changes their meta tags and schema while they sleep. The question this comparison actually answers isn’t which app scores higher — it’s whether you’re comfortable with software editing your store unsupervised.
We build Plug In SEO, so take that into account. But every price, rating, and feature below comes from each app’s live Shopify App Store listing as of July 2026. Not from an old screenshot or a competitor’s marketing page. Booster is a genuinely well-reviewed, free-to-start app with a large install base and an explicit AI-search (AEO) pitch.
Want to see exactly what Plug In SEO would flag on your store first? Install Plug In SEO and run a full audit before you decide.
The short answer
Stay on Booster if you want an app that scans your store and applies fixes on its own. Meta tags, broken links, image compression, structured data. With a genuinely usable free plan and an explicit push toward AI-search (AEO) readiness for ChatGPT and Gemini.
Pay for Plug In SEO if you want to understand what’s actually wrong before anything changes, keep human approval on every edit, and get AI keyword research plus rank tracking over time. Things Booster’s listing doesn’t offer.
Run both, carefully, if you like Booster’s automated technical fixes but want Plug In SEO’s keyword research and rank tracking layered on top. Just don’t let both apps write meta tags or schema at the same time.
Side by side
| Plug In SEO | Booster AI SEO + AEO Optimizer | |
|---|---|---|
| Developer | Plug In Useful | Booster SEO |
| App Store rating | 4.6★ (532 reviews) | 4.9★ (5,226 reviews) |
| Free plan | No | Yes — capped feature set, no time limit |
| Paid plans | $29.99 (Lite) / $49.99 (Standard) / $79.99 (Premium) per month | $39 (Pro) / $69 (Premium) per month |
| Core strength | Guided SEO audits, AI keyword research, rank tracking, human-approved fixes | Automated (“Auto Pilot”) AI fixes, AI-search/AEO readiness, image compression |
| How fixes get applied | Flags issues, explains them, you approve the change | Scans and auto-applies fixes with less manual review |
| Keyword research | Yes (AI-powered) | Not a listed feature |
| Rank tracking | Yes | Not a listed feature |
| Structured data (JSON-LD) | Yes, all plans (Product, Article, Website, Organization, BreadcrumbList, Social) | Yes, Pro plan and up (rich snippets/structured data) |
| AI-search / AEO marketing | Not branded as “AEO” — but its schema output feeds the same signals | Explicit AEO pitch: llms.txt, AI-optimized meta tags, targeted at ChatGPT/Gemini |
| Image optimization | Separate app (Plug In Speed) | Yes, Premium plan (5GB/month compression) |
Pricing, ratings and features as listed on the Shopify App Store, July 2026. Check each listing for the latest — both apps update pricing periodically.
What Booster is best at
The bottom line: Booster is built to find and fix technical SEO issues with minimal input from you, and its free plan is a real, functional starting point — not a stripped-down trial.
The free plan covers an SEO score and health badge, alt-text optimization, broken-link detection, manual audits, a weekly image sync of up to 50 images, email reports, and 24/7 chat support. Paying unlocks automation and depth. Pro ($39/month) adds meta title/description optimization, “Auto Pilot” SEO fixes that apply automatically, auto broken-link detection and fixes, rich snippets and structured data, sitemap submission, and AI-search optimization. Premium ($69/month) adds image compression (5GB/month), URL keyword optimization, image filename SEO, 365 days of Google Search Console metrics, and bulk actions with PDF reports.
AEO Pitch
Its AEO pitch is specific and current: Booster markets llms.txt support, structured data, and AI-optimized meta tags aimed at getting stores surfaced by ChatGPT, Gemini, and other AI assistants. Not just traditional Google results. It’s the better fit if your main need is “scan my store and apply the fixes automatically, including for AI search”, and you want a genuine free tier to start.
What Plug In SEO is best at
The bottom line: Plug In SEO is built to diagnose issues and explain them in plain English before anything changes on your store, with AI keyword research and ongoing rank tracking built in. That’s the depth Booster’s listing doesn’t cover, and it’s why Plug In SEO doesn’t come free.
Its core loop is scan → explain → approve. The SEO Scanner flags technical issues (heading structure, missing schema, URL problems, double meta tags) and content issues (keywords missing from titles, descriptions, alt text, file names), and every flagged issue links to a step-by-step fix guide — you decide what changes, rather than an “Auto Pilot” changing it for you. On top of the audit, Keyword Studio does AI-powered keyword research per page and site-wide. The bulk meta editor uses additive templates (your own words wrapped around a variable like %% product.title %%, so pages stay unique instead of turning identical).
Plug in SEO
Plug In SEO isn’t marketed with an “AEO” label the way Booster is, but the structured data it already outputs — the same schema types AI engines and answer boxes pull from — is the substance of what “AI-search readiness” actually means technically. It’s the better fit if your real problem is “I don’t know which keywords to target or whether my SEO is working, and I want to approve changes instead of trusting a bot to make them”, not just get fixes applied faster.
— The Stacc, Google AI Overview Statistics 2026
The honest trade-offs
The bottom line: the real question isn’t “which app has the better reviews” — Booster’s 4.9★ across 5,226 reviews is a genuinely strong track record. It’s whether you want fixes applied automatically or explained to you first.
On the free plan itself
Booster’s free tier isn’t a gimmick. Alt-text optimization, broken-link detection, and a 50-image weekly sync are real, usable features for a small store. But automation-heavy fixes (Auto Pilot, structured data, sitemap submission, AI-search optimization) sit behind the $39/month Pro plan, so the free plan mostly gets you visibility into problems, not the automated fixing Booster is best known for. Across SaaS broadly, freemium-to-paid conversion averages only around 3.7%, which is exactly why free tiers are built with a ceiling, not as an afterthought.
— First Page Sage, SaaS Freemium Conversion Rates 2026
On price once you do pay
It’s not a clean “one app is cheaper” story, and the two ladders work differently. Booster’s tiers gate features — Auto Pilot, structured data, and AI-search optimization only unlock on Pro and up. Plug In SEO’s three plans (Lite $29.99 / Standard $49.99 / Premium $79.99) all share the same feature set. What scales is how many products and categories you’re covering, not what the app can do.
Plug In SEO’s entry Lite plan actually undercuts Booster’s entry paid Pro plan ($39). But Booster’s top Premium tier ($69) still lands below Plug In SEO’s top Premium tier.
On what the price buys
The trade-off is automation versus control. Booster, at every tier, is about scanning and then acting. Less manual work, but also less visibility into exactly what changed and why before it happens. Plug In SEO adds a layer Booster’s listing doesn’t mention. It tells you which keywords to target, tracks whether your rankings are actually moving. And also requires your approval before a meta tag or product description changes.
How to choose
Strip away the feature lists, and it comes down to your actual bottleneck:
- “I want SEO fixes applied for me, automatically, without much input.” → Booster’s Auto Pilot and free-to-paid ladder are built exactly for this.
- “I specifically want my store ready for ChatGPT/Gemini-style AI search.” → Booster markets this directly with llms.txt and AI-optimized meta tags; Plug In SEO gets you most of the underlying structured-data signal without the AEO label.
- “I don’t know which keywords to target or whether my SEO is actually improving.” → Plug In SEO — keyword research and rank tracking are core, not add-ons.
- “I want to see and approve every change before it goes live on my store.” → Plug In SEO’s scan-explain-approve loop is built for that; Booster’s Auto Pilot is built for the opposite.
The honest summary
If your need is hands-off technical fixes and AI-search readiness on a budget, Booster’s free-to-paid ladder is a strong, legitimate option with the review count to back it up. If your gap is strategy and control — knowing what to target, tracking whether it’s working, and approving every change — Plug In SEO is built for that. And that’s what the $29.99/month starting price is paying for. (Weighing another free-plan rival? See how Plug In SEO compares against Smart SEO, or how Plug In Speed compares against TinySEO on the speed side of this same automation-vs-control trade-off.)
FAQ: Plug In SEO vs Booster SEO
Does Booster SEO have a free plan?
Yes. Booster’s free plan includes an SEO score and health badge, alt-text optimization, broken-link detection, manual audits, a weekly image sync of up to 50 images, email reports, and 24/7 chat support (per its live Shopify App Store listing, July 2026). Automated “Auto Pilot” fixes, structured data, and AI-search optimization require the paid Pro plan ($39/month).
Is Plug In SEO free?
No. Plug In SEO doesn’t offer a free plan. Plans start at $29.99/month (Lite), with Standard at $49.99 and Premium at $79.99. Booster, by contrast, does have an ongoing free tier with capped features.
Which app is better, Plug In SEO or Booster SEO?
Neither is universally better — they solve different problems. Booster is strong for automated technical fixes, a genuine free plan, and an explicit AI-search (AEO) push, backed by a large, high review count. Plug In SEO is strong for guided diagnosis, AI keyword research, rank tracking, and keeping a human in the loop on every change, but has no free plan. Pick based on whether you want fixes applied automatically or explained and approved by you first.
Can I run Plug In SEO and Booster SEO on the same store?
Technically yes, but be careful with overlap — both apps can generate meta tags and structured data, so running both at once risks duplicate or conflicting markup. If you do run both, pick one app to own each job (for example, Booster for automated technical fixes, Plug In SEO for keyword research and rank tracking) rather than letting both manage the same fields.
See what Plug In SEO finds on your store — before anything changes
If you’d rather understand your SEO issues and approve each fix than trust an Auto Pilot to make changes for you, Plug In SEO scans your store, explains exactly what’s wrong, and gives you AI keyword research and rank tracking in the same place. Install Plug In SEO and see the list before you commit to anything.