If you're comparing Mentionable and Otterly, you've already figured out that AI visibility matters. Both tools track how LLMs see your brand. They just approach it differently.
How they compare at a glance
Mentionable offers a 7-day free trial on all plans. Paid plans range from €29/month Starter (15 prompts across 5 LLMs), to €89/month Pro (50 prompts), up to €179/month Agency with unlimited projects.
Otterly doesn't offer a free tier, but they have a 7-day trial. Their Lite plan starts at $29/month with 15 prompts across 4 LLMs. The Standard plan jumps to $189/month for 100 prompts and unlimited workspaces. One thing worth noting: Google Gemini isn't included in the base plans. If you need it, that's an additional $9 to $149/month depending on your tier.
The math shifts based on your needs. If you want full LLM coverage without add-ons, Mentionable includes all 5 platforms (ChatGPT, Perplexity, Grok, Gemini, Claude) on every paid plan. Otterly's add-on structure can push costs up if you need specific platforms.
What Mentionable does well
The 7-day free trial lets you test whether AI visibility tracking actually matters for your business before spending anything. That's valuable when you're not sure if this is a problem you need to solve.
Every paid plan includes all 5 LLMs. No figuring out which platforms cost extra, no surprise fees. You pick your plan based on how many prompts you need, and the LLM coverage stays the same.
The prompt suggestion feature is useful if you're not sure what to track. Enter your URL, and Mentionable suggests 15 to 20 relevant prompts based on what your business does. You pick the ones that matter, add custom ones if you want, and start tracking. Less research upfront.
What Otterly does well
Otterly's GEO audits analyze 25+ on-page factors that influence AI visibility. If you want to understand why you're not appearing (not just that you're not), this gives you actionable data to work with.
Their workspace organization is built for agencies managing multiple clients. Mentionable has projects, but Otterly's structure is designed specifically for agency workflows with client separation.
Geographic coverage is another strength. Otterly supports 50+ countries with localized tracking. If you're running international campaigns and need to know how AI responds in different markets, that matters.
Otterly also checks daily by default. Mentionable's more affordable plans track weekly or bi-weekly, which is fine for most use cases but less granular.
Which one fits your workflow?
If you want to start without spending money and see if AI visibility tracking is worth your time, Mentionable's 7-day free trial makes that easy. If you're a solopreneur or small team who wants straightforward tracking across all major LLMs without add-on complexity, Mentionable is built for that use case.
If you need detailed GEO audits with on-page recommendations, manage multiple clients in organized workspaces, or track visibility across many countries with daily updates, Otterly's depth matches those requirements. The higher price reflects the broader feature set.
Both are solid tools. The choice comes down to whether you need comprehensive auditing and agency features, or simpler tracking that gets to the point. Try Mentionable's 7-day free trial first to see if basic AI visibility tracking gives you what you need. If you find yourself wanting more depth, Otterly is worth a look.