Free AEO Tools in 2026 (and the Cheapest Paid Upgrades)

Most "best AEO tools" lists jump straight to platforms costing hundreds or thousands per month. But AEO has an unusual property: the most important first step — finding out whether AI engines name you at all — costs nothing. This guide covers only what's genuinely free, then the cheapest honest ways to pay for more, so a small business can run a complete AEO loop for under $50 total.

Genuinely free AEO tools

1. Answerlord — free AI-visibility grade (ours)

Answerlord (answerlord.com) generates five buyer-intent questions for your niche, asks ChatGPT, Perplexity, and Google AI Overviews live, and returns a 0–100 AI Visibility Score with the exact competitors the engines named instead of you — plus a prioritized fix plan. No login, no card, and no fabricated numbers: engines that can't be reached are excluded from your score, never guessed. It's free because the grade is the diagnosis; we sell the deeper fix ($47 kit) and scheduled monitoring ($29/month), not the measurement.

2. HubSpot's AEO grader

HubSpot offers a free AEO grader as part of its marketing product. If you already live in the HubSpot ecosystem it's a convenient check; like most suite tools, the free layer is an on-ramp to the paid platform around it.

3. Free checks you can run by hand

• ✓Ask the engines yourself. Type your real buyer questions ("best [your niche] for [your customer]") into ChatGPT, Perplexity, and Google, and note who gets named. Manual, unscored, and easy to cherry-pick — but free and eye-opening. Our guide to running a fan-out analysis shows how to do it systematically.
• ✓Google's schema validator (validator.schema.org) — checks the structured data that helps engines extract your facts, free.
• ✓Your own site, read aloud. The answer-first test: does any page answer a buyer's exact question in its first two sentences? That edit costs nothing and is the single highest-leverage AEO fix.

The cheapest paid upgrades, in order

1. 1.$47 one-time — [AEO Builder Kit](/kit). The implementation layer: prompt library, schema templates, content frameworks, and the AEO Bones Checklist, personalized to your grade. For owners doing the work themselves.
2. 2.$29/month — monitoring. Answerlord Pro re-grades your domains on a schedule with score history, competitor benchmarking, and drop alerts. Otterly.ai's published pricing also starts at $29/month for prompt tracking. This tier is for proving movement, not finding gaps.
3. 3.$99+/month — enterprise-style tracking. Platforms like Profound start here (ChatGPT-only tier) and scale to custom enterprise plans. Worth it for agencies and brands where AI answers are already a proven channel.

Run the free grade before paying anyone a dollar. Half the businesses we grade discover their problem isn't the one they were about to fund.

What free tools can't do

Honesty cuts both ways: a free grade is a snapshot, not surveillance. It won't track hundreds of custom prompts daily, alert you within hours of a lost citation, or benchmark six models side by side — that's what the paid platforms in our full buyer's guide charge for, and at enterprise scale they're worth it. The free tier answers the question that comes first: *is the AI naming me, or my competitor?* Everything else is optional until you know.

Verification: Answerlord prices ($0 grade, $47 Kit, $29/mo Pro) are our own. Otterly.ai's from-$29/month and Profound's from-$99/month figures come from their published pricing pages as of July 2026 — prices change; treat each vendor's site as the source of truth. HubSpot's grader is described from its published positioning; we make no claims about its methodology.