Disclosure We build SellOnLLM. Pricing and feature claims for Otterly are based on publicly marketed positioning; always confirm on otterly.ai before you buy.
Quick verdict
- Pick SellOnLLM if you want a free baseline today, page-level AEO audits in Chrome, Shopify AI traffic context, and weekly monitoring / competitor page watch around $10/mo.
- Pick Otterly if your primary need is a dedicated AI search analytics suite with broader prompt libraries, multi-engine dashboards, and reporting suited to agencies or larger SEO teams—and you already budget for that category.
- Many teams use both in sequence: free SellOnLLM check to prove the problem → paid Otterly (or SellOnLLM Unlimited) once leadership funds ongoing tracking.
Side-by-side
| Dimension | SellOnLLM | Otterly AI |
|---|---|---|
| Best entry | Free web check + Chrome extension | Paid platform / trial onboarding |
| Core job | Score + prompts + AEO audit + optional weekly monitor & competitor page watch | AI search / brand mention monitoring across engines with dashboards |
| Price band | Free check; content tools from ~$5; Unlimited visibility ~$10/mo | Typically mid-market SaaS (confirm current plans on their site) |
| Where you work | Browser toolbar + shareable result pages | Web app dashboards & reports |
| Fix layer | On-page AI Readiness Score, llms.txt, free site audit tools | Stronger on measurement; pair with your own audit stack |
| Ideal buyer | Founders, freelancers, small brands, Shopify merchants | Agencies & teams already buying SEO/AEO analytics suites |
Where Otterly wins
Otterly’s pitch is clear: treat AI answer engines like a measurable channel. If you need wide prompt coverage, multi-engine visibility charts, and client-ready reporting as the center of your weekly SEO ritual, a dedicated monitoring suite is the right category. SellOnLLM is not trying to out-dashboard Otterly on every engine × prompt matrix on day one.
Where SellOnLLM wins
- Zero-friction proof. Free AI visibility check—no account—so a founder can see “do we show up?” before any procurement.
- Chrome-native AEO. The extension audits any URL (including competitors) with a transparent AI Readiness Score.
- Under-$30 ongoing. Unlimited visibility + competitor page watch is priced for solo operators, not enterprise RFPs.
- Commerce context. Shopify AI traffic + free audits (llms.txt, E-E-A-T, site crawl) sit next to visibility—not only mention charts.
Pricing honesty
SellOnLLM publishes simple public pricing on the product pages. Otterly’s plans and prompt limits change; we will not invent numbers here. If your budget is “prove it this afternoon for $0,” start with SellOnLLM. If your budget is “replace a Semrush-adjacent line item for AI search,” shortlist Otterly and compare against Peec and our 2026 tools roundup.
Decision checklist
- Do you need a free shareable report for a client or boss this week? → SellOnLLM.
- Do you already audit pages in Chrome while editing templates? → SellOnLLM extension.
- Do you need multi-brand, multi-engine weekly decks as the primary deliverable? → Otterly (or similar suites).
- Are you on Shopify and care about AI-referred sessions? → SellOnLLM Shopify app + visibility check.