Mentions.so vs Otterly.AI (2026): Which AI visibility tool is better?

Key Takeaways

• Mentions.so costs 3.4x more than Otterly.AI at the entry level ($99/mo vs $29/mo) but includes sentiment analysis and AI traffic attribution that Otterly lacks entirely
• Otterly.AI offers a GEO Audit tool analyzing 25+ on-page factors -- Mentions.so has no equivalent site audit feature
• Mentions.so shows full AI responses with sentiment scoring for each mention; Otterly.AI focuses on citation counts and share of voice metrics
• Both track the same 6 core AI models (ChatGPT, Perplexity, Google AI Overviews, Gemini, Copilot, plus extras) but neither offers content generation or optimization tools
• Otterly.AI's $29 Lite plan (15 prompts) is the cheapest entry point in the AI visibility space; Mentions.so starts at $99 for an unspecified prompt limit
• If you need to understand how AI talks about your brand (sentiment, tone, context), Mentions.so wins. If you just need citation counts and basic monitoring on a budget, Otterly.AI delivers.

Overview

Mentions.so

Mentions.so positions itself around sentiment and narrative control. The platform tracks brand mentions across ChatGPT, Claude, Gemini, Perplexity, Google AI Overviews, Grok, DeepSeek, and Meta AI. The core differentiator: it shows you the full AI-generated response and scores sentiment (positive, neutral, negative) for each mention. You also get AI traffic attribution -- a code snippet that tracks how much traffic comes from AI search engines and which prompts drove it. The interface emphasizes daily performance reports and "practical recommendations" to improve rankings, though the specifics of those recommendations aren't detailed on the site. Pricing starts at $99/mo for the Starter plan and scales to $599/mo for Agency. A free tier exists but with unclear limits.

Otterly.AI

Otterly.AI markets itself as the affordable monitoring option. It tracks 6 AI platforms: ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, and Copilot. The standout feature is the GEO Audit tool, which analyzes 25+ on-page factors (structured data, content depth, citation-worthiness signals) and tells you what's blocking your site from getting cited. Otterly focuses on share of voice metrics, citation tracking, and competitor benchmarking. No sentiment analysis. No traffic attribution. Just monitoring and audit insights. Pricing is aggressive: $29/mo for Lite (15 prompts), $189/mo for Standard (100 prompts), and custom pricing for Premium (unlimited prompts). 14-day free trial included.

Side-by-Side Comparison

Head-to-head feature breakdown

User interface and workflow

Mentions.so leans into visual storytelling. The dashboard shows sentiment trends over time (color-coded positive/neutral/negative bars), full AI responses with your brand highlighted, and competitor visibility charts. The workflow: add your domain, pick or customize prompts (AI suggests relevant ones), then review daily performance reports with "winning insights." The emphasis is on narrative -- understanding how AI talks about you, not just if it mentions you.

Otterly.AI feels more utilitarian. The interface centers on citation counts, share of voice percentages, and the GEO Audit scorecard. You see which websites get cited most often, where you rank vs competitors, and a checklist of on-page issues to fix. Less storytelling, more data tables. The workflow: set up prompts, run the audit, fix the issues flagged, monitor citation changes. It's built for SEO teams who want actionable technical fixes.

Verdict: Mentions.so wins on polish and narrative depth. Otterly.AI wins on technical actionability with the audit tool.

Sentiment analysis and response context

This is where the two tools diverge completely.

Mentions.so shows the full AI-generated response for each prompt and scores sentiment. You see exactly what ChatGPT or Claude said about your brand -- the tone, the context, whether you were recommended or just mentioned in passing. Sentiment is tracked over time so you can spot shifts (e.g. a product launch improving positive mentions, or a PR crisis tanking sentiment). This matters if your brand reputation in AI search is a concern.

Otterly.AI doesn't do sentiment at all. You get citation counts ("your site was cited 12 times this week") and share of voice ("you own 8% of mentions in this category"), but no insight into tone or context. You know you were mentioned; you don't know if it was flattering or damning.

Verdict: Mentions.so wins decisively if sentiment matters. Otterly.AI isn't even playing this game.

GEO audit and optimization guidance

Otterly.AI's GEO Audit tool is its killer feature. It crawls your site and scores 25+ factors that influence AI citation likelihood: structured data markup, content depth, topical authority signals, internal linking, FAQ schema, author credibility markers, and more. You get a report card showing strengths and weaknesses, plus specific fixes ("Add FAQ schema to these 5 pages" or "Increase content depth on this topic cluster"). It's the closest thing to traditional SEO auditing adapted for AI search.

Mentions.so offers "practical recommendations" in daily reports, but the site doesn't detail what those are. No audit tool. No on-page analysis. The recommendations seem to be prompt-level insights ("you're not ranking for this query, here's why") rather than technical site fixes.

Verdict: Otterly.AI wins on technical optimization. If you need to fix your site to get cited, Otterly gives you a roadmap. Mentions.so doesn't.

AI traffic attribution

Mentions.so includes a tracking snippet that measures traffic from AI search engines. You can see which prompts drove visits, how much traffic came from ChatGPT vs Perplexity, and connect visibility to actual user behavior. This closes the loop between monitoring and business impact.

Otterly.AI has no traffic attribution. You know you're getting cited, but you can't measure if those citations drive traffic or conversions.

Verdict: Mentions.so wins. Traffic data turns visibility into a business metric.

AI model coverage

Mentions.so tracks 8 models: ChatGPT, Claude, Gemini, Perplexity, Google AI Overviews, Grok, DeepSeek, Meta AI. Otterly.AI tracks 6: ChatGPT, Perplexity, Google AI Overviews, Google AI Mode, Gemini, Copilot. The overlap covers the big players (ChatGPT, Perplexity, Gemini, AI Overviews). Mentions.so adds Claude, Grok, DeepSeek, and Meta AI. Otterly.AI adds Google AI Mode and Copilot.

Claude matters if you're targeting developer or technical audiences (high Claude usage). Grok matters if you care about X/Twitter integration. DeepSeek is niche but growing. Meta AI matters for Facebook/Instagram integration. Copilot matters for enterprise Microsoft environments. Google AI Mode is Google's experimental conversational search interface.

Verdict: Slight edge to Mentions.so for broader coverage, but both hit the essential models.

Competitor benchmarking

Both tools offer share of voice tracking -- you see your brand's mention percentage vs competitors for each prompt. Mentions.so visualizes this with competitor visibility charts ("Kajabi 67%, Thinkific 59%, Teachable 46%"). Otterly.AI shows similar data in table format.

Neither tool offers deep competitor analysis (e.g. which pages competitors get cited for, what content gaps they're exploiting). It's surface-level benchmarking.

Verdict: Tie. Both do the basics; neither goes deep.

Prompt management

Mentions.so uses AI to suggest prompts based on your domain, then lets you accept/reject or add custom ones. The interface shows a feed of AI-suggested prompts with one-click approval. Otterly.AI lets you add custom prompts but doesn't mention AI suggestion.

Verdict: Mentions.so wins on ease of setup with AI-suggested prompts.

Pricing comparison

Otterly.AI is dramatically cheaper at the low end. $29/mo for 15 prompts is the most affordable entry point in the AI visibility space. Mentions.so starts at $99/mo with no clear prompt limit disclosed. If you're monitoring a small set of high-value prompts, Otterly.AI's Lite plan is hard to beat. If you need to track 50+ prompts, Mentions.so might offer better value per prompt (depending on the Starter plan's actual limit, which isn't public).

The $599/mo Agency plan from Mentions.so suggests white-label or multi-client features, but details aren't on the site. Otterly.AI's Premium plan is custom-priced for unlimited prompts, likely targeting agencies and enterprises.

Verdict: Otterly.AI wins on affordability. Mentions.so's pricing is opaque and higher.

Pros and cons

Mentions.so pros

• Sentiment analysis gives you narrative control, not just citation counts
• AI traffic attribution connects visibility to business outcomes
• Full AI responses show exactly what's being said about your brand
• AI-suggested prompts speed up setup
• Tracks 8 AI models including Claude, Grok, DeepSeek

Mentions.so cons

• 3.4x more expensive than Otterly.AI at entry level
• No GEO audit tool for technical site optimization
• Prompt limits not disclosed on pricing page
• "Practical recommendations" are vague -- unclear what you actually get
• Free tier limits are unclear

Otterly.AI pros

• $29/mo entry price is the cheapest in the category
• GEO Audit tool gives actionable technical fixes (25+ factors)
• 14-day free trial lets you test before committing
• Share of voice and citation tracking cover the basics well
• Unlimited prompts available on Premium plan

Otterly.AI cons

• No sentiment analysis -- you know you were mentioned but not how
• No AI traffic attribution -- can't measure business impact
• Doesn't show full AI responses, just citation counts
• 15-prompt limit on Lite plan is tight for most brands
• No AI-suggested prompts to speed up setup

Who should pick which tool

Choose Mentions.so if:

• Brand reputation in AI search is a top concern and you need sentiment tracking
• You want to see full AI responses, not just citation counts
• Measuring AI traffic and connecting visibility to conversions matters
• You're willing to pay $99+/mo for narrative depth and traffic data
• You need Claude, Grok, or DeepSeek coverage

Choose Otterly.AI if:

• Budget is tight and you need basic monitoring for under $50/mo
• You want technical site optimization guidance (GEO Audit)
• Citation counts and share of voice metrics are enough -- sentiment doesn't matter
• You're monitoring a small set of high-value prompts (15 or fewer on Lite plan)
• You prefer a no-frills, data-focused tool over narrative storytelling

If you're also tracking how your brand shows up in AI search and need to close the gap between monitoring and optimization, Promptwatch offers a middle path: it combines citation tracking with content gap analysis and an AI writing agent that generates articles designed to get cited. Worth exploring if neither Mentions.so nor Otterly.AI fully solves your workflow.

Final verdict

Mentions.so and Otterly.AI serve different needs. Mentions.so is the sentiment-first platform for brands that care about narrative control and want to measure AI traffic. Otterly.AI is the budget-friendly monitoring tool with a strong technical audit feature for fixing on-page issues.

If you're a brand manager or PR team worried about how AI portrays you, Mentions.so's sentiment analysis and full response tracking justify the higher price. If you're an SEO team on a tight budget that just needs citation counts and technical optimization guidance, Otterly.AI delivers at $29/mo.

Neither tool offers content generation or deep optimization workflows -- they're both monitoring platforms. The choice comes down to: do you need sentiment and traffic data (Mentions.so), or do you need technical audits and affordability (Otterly.AI)? Pick based on that split.