TL;DR
- Otterly is a focused, affordable AI-visibility tool: it tracks how often ChatGPT, Perplexity, Copilot, and other engines mention your brand across a set of prompts, and it has grown to add URL/GEO audits and generative-engine-optimization tips. Its strength is broad, affordable cross-engine mention tracking.
- AuditSpark is a full website audit that also scores your AI visibility. It evaluates your entire site across 15 categories, gives you a free AI/GEO readiness score, and — with the AI Visibility add-on — measures whether engines cite you. The difference: it looks at your whole site, not just your AI mentions.
- Pick Otterly if your priority is broad, affordable cross-engine tracking of your brand's AI mentions, with GEO tips alongside.
- Pick AuditSpark if you want to understand and improve your whole website — for both human visitors and AI engines — with a free tier and a one-time option, not just a tracking dashboard.
At a glance
| AuditSpark | Otterly | |
|---|---|---|
| What it is | Full website audit + AI/GEO readiness + AI visibility | AI-visibility tracking + GEO tips |
| Full website audit (UX, SEO, conversion, performance…) | ✓ 15 categories | ✗ (GEO/URL audits only) |
| Free AI/GEO readiness score | ✓ on every report | ✗ |
| Off-site AI citation tracking | ✓ (add-on) | ✓ (core) |
| Engines tracked (off-site) | ChatGPT, Claude, Gemini, Copilot, Perplexity, Google AI Overviews | ChatGPT, Google AIO, Perplexity, Copilot (+Gemini/Claude add-ons) |
| Tracking over time | ✓ AI Visibility trend dashboard + scheduled monitoring | ✓ (core) |
| Tells you what to fix | ✓ full-site roadmap | ✓ GEO tips only |
| Free tier | ✓ (score + summary + readiness) | ✗ (free trial) |
| One-time option | ✓ $39 Pro Report | ✗ subscription only |
| Entry price | Free · $39 once · $99/mo | from $29/mo |
What Otterly does well
Credit where it's due: Otterly is sharp at telling you how visible your brand is inside AI answers — it's affordable and multi-engine, and it has grown to add URL/GEO audits and optimization tips on top of the tracking. If your question is "how often do ChatGPT, Perplexity, and Copilot mention us, and is that trending up?", Otterly answers it directly. Engine breadth is now comparable — both track a similar set — but Otterly is a purpose-built monitor, and its higher tiers track far more prompts per site than an audit add-on does. If tracking a large prompt set continuously is your single most important requirement, that's a real point in Otterly's favor.
Where AuditSpark is different
AuditSpark isn't primarily a tracker — it's a full website audit. Otterly (now) tells you how you're doing on AI visibility and gives GEO tips; AuditSpark scores your entire site and tells you what to fix across all of it.
- It scores your whole site, not just your AI mentions. 15 categories — UX, conversion, messaging, SEO, performance, accessibility, trust, and more — because AI visibility doesn't exist in a vacuum: the same clarity and structure that helps humans convert is what makes a page citable. Otterly's audits are GEO/URL-focused; they don't cover your conversion paths, messaging, or technical health.
- The AI/GEO readiness score is free, on every report. That's the deterministic, on-site half of AI visibility — schema, semantic HTML, E-E-A-T, AI-crawler policy (GPTBot, ClaudeBot, etc.). Otterly now checks some of this too, but AuditSpark gives it to you free, before you pay for anything.
- It tells you what to fix across the whole site. Every audit ends in a prioritized 30/60/90-day roadmap spanning all 15 categories — not just GEO recommendations, but conversion, messaging, performance, and trust too.
- It tracks over time now, too. The one-shot audit isn't the whole story: subscription plans include an AI Visibility dashboard that trends your scores run over run, and Agency plans can put a site on scheduled monitoring with an automated "what's changed" brief each cycle. So the monitoring job is covered — as part of the audit, not instead of it. Otterly still tracks more prompts per site at its higher tiers, but AuditSpark now tells you what's changing and what to do about it.
- There's a free tier and a $39 one-time report. You can see where you stand for free, or buy a single full report without a subscription — neither of which a monitoring subscription offers.
Which should you choose?
- Choose Otterly if you specifically want ongoing, multi-engine monitoring of your brand's AI mentions and you don't need a website audit.
- Choose AuditSpark if you want to diagnose and improve your entire website — for humans and AI — in one tool, with the AI-visibility piece included as part of the bigger picture, plus a free tier and a one-time option.
They're not really the same product: one is a tracker, the other is an audit that happens to include AI visibility. Many teams would get more from understanding and fixing their site than from a mentions dashboard alone — but if you've already done the fixing and just want to watch the needle across every engine, a dedicated monitor is the right tool.
FAQ
Is AuditSpark an alternative to Otterly? Partly. AuditSpark includes AI-visibility tracking, so it covers Otterly's core use case — but it's built as a full website audit, not a pure monitoring tool. If you only want monitoring, Otterly is more specialized; if you want the audit and the visibility picture, AuditSpark does both.
Does AuditSpark track AI visibility across multiple engines? AuditSpark's free AI/GEO readiness check evaluates your site for all the major engines' crawlers. The paid off-site visibility add-on probes six engines — ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, and Google AI Overviews — all with live web search. That is comparable breadth to Otterly; the difference is prompt volume, where a dedicated monitor tracks more per site than an audit add-on.
Can AuditSpark monitor my AI visibility over time, like Otterly? Yes — that's newer. Subscription plans include an AI Visibility trend dashboard, and Agency plans can schedule recurring monitoring with an automated "what's changed" brief. Otterly is a purpose-built monitor with deeper prompt coverage; AuditSpark folds tracking into the audit so you also get the fix list.
What does AuditSpark do that Otterly doesn't? A full 15-category website audit (UX, conversion, messaging, performance, trust, and more), a free on-site AI/GEO readiness score, and a prioritized whole-site roadmap — plus a free tier and a $39 one-time report. Otterly adds GEO/URL audits and tips, but doesn't audit your full website.
How much does each cost? AuditSpark: free tier, $39 one-time Pro Report, $99/mo Freelance, $349/mo Agency. Otterly: subscription only — from $29/mo (Lite, 15 prompts) to $489/mo (Premium, 400 prompts), with a custom Enterprise tier and a free trial. (A separate ~$27/mo entry SKU is listed in the Semrush App Center.)
See where you stand — free
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Run a free audit →Information current as of July 13, 2026. Competitor pricing and features change frequently; check the vendor's own site for the latest before deciding.
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