“AEO” (Answer Engine Optimization) and “GEO” (Generative Engine Optimization) describe the same goal: getting your content surfaced and cited by AI answer engines instead of buried beneath them. A growing category of Chrome extensions promises to help. This guide gives you an honest framework for evaluating them in 2026—what actually matters, where tools differ, and how the free SellOnLLM extension compares—so you can pick the right one instead of the loudest one.
AEO vs GEO: same problem, different label
You’ll see both terms used interchangeably. AEO emphasizes being the answer in engines like ChatGPT, Perplexity, and Google AI Overviews. GEO emphasizes being reused by generative models more broadly. In practice, the work is identical: make pages machine-readable, structured, trustworthy, and easy to cite. For the strategy foundation, start with our AEO Hub and practical AEO guide.
What to look for in an AEO/GEO extension
Most extensions fall short on at least one of these. Use it as a checklist when you evaluate any tool:
- On-page auditing with a transparent score. Does it explain why a page will or won’t get cited, with a defensible number? (See how we document our AI Readiness Score.)
- Structured data & llms.txt checks. Does it validate Schema.org markup and detect a spec-compliant llms.txt?
- AI-ready content generation. Can it draft meta titles, descriptions, and page copy tuned for AI extraction—not just SEO keywords?
- Citation / visibility tracking. Does it test whether ChatGPT, Claude, and Perplexity actually recommend you?
- A genuinely free tier. Can you get value without a credit card or forced trial?
- Works on any page. Can you audit competitors, not just your own verified site?
The three categories of tools
Rather than a misleading “#1 vs #2” list, it’s more useful to understand the categories, because they solve different problems.
1. Single-purpose auditors
These check one thing well—say, structured data validation or a readability grade—but stop there. Useful as a spot check, but they don’t connect the audit to content fixes or citation outcomes, so you’re left stitching tools together.
2. Content-generation extensions
These focus on drafting AI-optimized copy or meta tags. Great for output speed, but without an audit layer you’re generating content blind—you don’t know which pages actually need help or whether the change moved your visibility.
3. End-to-end AEO platforms
These combine auditing, content, and citation tracking in one loop: diagnose a page, fix it, and measure whether AI engines start citing you. This is the category SellOnLLM sits in, because the three jobs only compound when they share the same data.
How SellOnLLM approaches it
The SellOnLLM Chrome extension is built around one workflow that runs from your toolbar on any page:
- Audit — a free-forever AI Readiness Score with Technical and Content sub-scores and a prioritized fix list.
- Create — generate AI-ready meta and page copy based on what the audit found.
- Track — an AI Visibility check that shows whether ChatGPT, Claude, and Perplexity cite you, with monitoring over time.
The audit is free with no account required, so you can pressure-test it—and any competitor—on your own pages before spending anything.
A fair comparison framework
Instead of trusting a vendor’s self-ranking (including ours), score each tool you’re considering against the capabilities that map to citations. Copy this table and fill it in for the shortlist you’re evaluating:
| Capability | Why it matters | SellOnLLM |
|---|---|---|
| On-page audit + score | Diagnoses why you’re not cited | Yes, free |
| Technical + content breakdown | Tells you where to fix | Yes |
| Structured data & llms.txt checks | Machine-readability | Yes |
| AI-ready content generation | Turns findings into fixes | Yes (paid) |
| Citation tracking across engines | Proves impact | Yes (one free check) |
| Audit any page (incl. competitors) | Competitive research | Yes |
| Free tier without card | Try before you buy | Yes |
The point isn’t to declare a universal winner—it’s to make sure you buy the capabilities that actually move citations for your use case. If you only need a quick structured-data check, a single-purpose tool may be enough. If you want the full diagnose–fix–measure loop, you want an end-to-end platform.
Extensions vs. site-wide tools
A browser extension shines for fast, page-level checks and competitor research on any URL. For crawling dozens of URLs at once, pair the extension with a site-wide audit—we offer a free multi-page LLM audit and a free E-E-A-T scanner for that. Teams that live in Claude can also use our AI Visibility MCP. Use the right surface for the job rather than forcing one tool to do everything.
How to run your own bake-off in 10 minutes
- Pick one important page (a product or comparison page).
- Install two or three extensions from your shortlist.
- Run each on the same page and compare: is the score explained? Are the fixes specific and actionable?
- Run one on a competitor’s page—can it, or does it lock you to verified sites only?
- Check the citation feature: does it actually query AI engines, or just guess?
Ten minutes of hands-on testing beats any listicle—including this one. For the broader tool landscape beyond extensions, see our best AI search visibility tools comparison.
Bottom line
The “best” AEO/GEO Chrome extension is the one that closes the loop from diagnosis to citation for your business, with a free tier you can actually try. Audit a page today with the free SellOnLLM extension, compare it head-to-head with anything else on your list, and let the results decide.