A fair, detailed comparison of per4mx and OtterlyAI — two dedicated AI visibility platforms with different approaches to helping B2B companies get recommended by AI.
As Generative Engine Optimization matures, two dedicated platforms have emerged as leading options for B2B companies serious about AI visibility: per4mx and OtterlyAI. Both help you understand and improve how AI models describe and recommend your company. But they take meaningfully different approaches.
This comparison is intended to be fair. We build per4mx, so we obviously believe in our approach — but we also respect what OtterlyAI has built. The right choice depends on your specific situation, and for some companies, OtterlyAI may genuinely be the better fit.
This article provides a detailed, feature-by-feature comparison, includes real-world usage scenarios for each tool, and offers a practical decision framework to help you choose the right platform — or combination of platforms — for your Swiss B2B company.
At the core, both per4mx and OtterlyAI address the same fundamental need: understanding how AI models see your company. Both platforms:
Where they diverge is in scope, methodology, and target market.
Core philosophy: Monitor, analyse, generate, publish — close the loop from insight to action.
per4mx queries seven major AI providers — ChatGPT, Claude, Google AI Mode, Google AI Overview, Copilot, Perplexity, and Brave — using realistic, conversational buyer prompts. It does not just check if your brand name appears; it simulates the actual conversations Swiss B2B buyers have with AI tools and analyses where your company appears in the response, how it is described, and who is mentioned alongside you.
This is where per4mx diverges most significantly from monitoring-only tools. After identifying visibility gaps, per4mx generates optimised content designed to close them — articles, FAQ content, llms.txt files, and structured data recommendations. The content is tailored to what each AI model needs to see in order to recommend your company.
per4mx generates optimised llms.txt files for your domain, ensuring AI models have structured, accurate information about your company. For companies without large content teams, this is a significant advantage.
Built in Switzerland for the Swiss market, per4mx natively handles German, French, Italian, and English queries. It understands DACH-specific terminology, Swiss business conventions, and the multilingual complexity that makes AI visibility uniquely challenging in this region.
Tiered plans from CHF 79/month for core monitoring to enterprise pricing for full content generation, competitor intelligence, and llms.txt capabilities.
Core philosophy: Comprehensive tracking and analysis of AI visibility across the broadest possible range of AI tools.
OtterlyAI's citation tracking is its standout feature. It monitors which AI platforms cite your content, how frequently, and with what context. The historical trending data helps you understand whether your visibility is improving or declining, and the citation analytics connect to the broader AI recommendation economy.
OtterlyAI analyses your website content for AI-readiness — checking factors like content structure, factual density, schema markup, and machine-readable signals. The audit provides a score and actionable recommendations for improvement.
OtterlyAI tracks visibility across a wide range of AI tools, including some niche and emerging platforms beyond the major providers. For companies concerned about long-tail AI visibility, this broader coverage is valuable.
OtterlyAI bridges the gap between traditional SEO and AI visibility more explicitly than some competitors. It connects AI visibility metrics with SEO data, helping marketers see the full picture of digital discoverability.
Plans starting around $149/month, with enterprise tiers for larger organisations. Pricing is competitive with other analytics-focused marketing tools.
| Capability | per4mx | OtterlyAI |
|---|---|---|
| AI visibility monitoring | 4 major providers | Broad coverage including niche tools |
| Prompt simulation | Conversational buyer prompts | Brand and keyword queries |
| Content generation | Yes — articles, FAQs, llms.txt | No — recommendations only |
| llms.txt generation | Yes | No |
| Gap analysis | Deep — with remediation | Yes — with audit scores |
| Citation tracking | Yes | Yes — industry-leading depth |
| DACH multilingual | Native DE/FR/IT/EN | English-primary, some multilingual |
| SEO integration | Limited — GEO-focused | Yes — connects AI and SEO data |
| Team size needed | Small — tool handles execution | Larger — team must act on insights |
To make this comparison concrete, here is how each tool would be used in common Swiss B2B scenarios:
With per4mx: The marketing team uses per4mx to test buyer prompts related to the new product category across ChatGPT, Claude, Perplexity, and Google AI. per4mx identifies that no AI model currently mentions the company for this product category. The gap analysis reveals that the company lacks specific content addressing the new product's use cases. per4mx generates three optimised articles targeting the identified gaps and generates an optimised llms.txt file. Within three weeks, Perplexity begins citing the new content. The team monitors weekly as visibility builds across platforms.
With OtterlyAI: The marketing team uses OtterlyAI to establish a citation baseline for the new product category. OtterlyAI's audit identifies content gaps and structural issues on the website that reduce AI readability. The team receives a prioritised list of recommendations. They write and publish the content themselves (OtterlyAI does not generate content), then track citation improvements through OtterlyAI's historical trending dashboard. The analytics are deep, but the team needs to handle all content creation and publishing independently.
With per4mx: The firm configures per4mx with five competitor names and twenty buyer-relevant prompts in both German and English. per4mx simulates buyer conversations and shows which competitors appear, in what position, and with what descriptions. The competitive intelligence reveals that one competitor dominates Claude responses due to strong training data presence, while another leads on Perplexity due to recent press coverage. per4mx recommends specific content and PR actions to close each gap.
With OtterlyAI: The firm sets up competitor tracking in OtterlyAI and monitors citation rates over time. OtterlyAI's broader AI platform coverage reveals that one competitor is also appearing on niche AI tools the firm had not considered. The historical trending shows whether competitive positions are shifting week over week. The analytics depth helps the firm's strategy team understand long-term trends, but tactical remediation must be planned and executed separately.
With per4mx: The company founder uses per4mx's guided setup to configure the platform with company details and key buyer prompts. per4mx generates an llms.txt file, creates optimised content, and generates an optimised llms.txt file — requiring minimal hands-on work. The founder spends one hour per week reviewing per4mx's monitoring dashboard and approving content suggestions. This is the closest to a "done-for-you" AI visibility solution.
With OtterlyAI: The founder receives comprehensive analytics about their AI visibility position and a list of recommendations. However, without a marketing team to write content, optimise pages, and manage publishing, acting on the insights is challenging. OtterlyAI tells you what to do; you need your own resources to do it.
If you are already using one tool and considering switching, here are the practical considerations:
One of the most important differences between AI visibility tools — including per4mx and OtterlyAI — is their query methodology. As we detail in our analysis of why most AI visibility tools give you the wrong answer, tools that query base models without web search enabled measure a fundamentally different thing than tools that use search-enabled queries.
For Swiss and DACH companies, this distinction is critical because base model training data skews heavily toward US and English-language content. A tool that only measures base model responses may show a Swiss company as invisible when they are actually well-represented in search-enabled AI responses — the mode that real buyers actually use.
When evaluating either per4mx or OtterlyAI (or any AI visibility tool), ask explicitly whether their monitoring uses search-enabled queries. The answer significantly affects the accuracy and relevance of the data you receive, particularly for non-US markets.
The most important decision is not which tool you choose — it is whether you invest in AI visibility at all. Both per4mx and OtterlyAI are significantly better than no tool. The companies that are monitoring their AI presence, identifying gaps, and working to close them are pulling ahead of those that are still focused exclusively on traditional SEO.
For a broader view of the AI visibility tool landscape including traditional SEO platforms, see our complete comparison of AI visibility tools for B2B in 2026.
per4mx offers a free AI visibility scan that gives you an initial assessment of your position across major AI platforms. OtterlyAI also offers trial access. We recommend running both trials simultaneously with the same set of buyer prompts, so you can directly compare the insights, interface, and actionability of each platform. A two-week trial period with both tools running in parallel will give you a clear picture of which approach suits your team and workflow.
per4mx is generally easier for GEO beginners because it handles more of the execution (content generation, publishing) rather than just providing analytics. OtterlyAI assumes you have the expertise and resources to interpret its analytics and act on the recommendations independently. If you are new to GEO and want a guided experience, per4mx is the stronger starting point. If you have an experienced marketing team that prefers deep data and independent execution, OtterlyAI's analytics depth may be more valuable.
No. per4mx and OtterlyAI are complementary to traditional SEO tools, not replacements. Semrush and Ahrefs monitor your Google rankings, backlinks, and keyword performance. per4mx and OtterlyAI monitor what AI models say about your company. These are different channels serving the same goal (digital discoverability), and the insights from each inform the other. Most serious Swiss B2B companies use one AI visibility tool alongside one SEO tool. For a detailed comparison of per4mx and Semrush specifically, see our dedicated analysis.
Both tools provide immediate value through baseline measurement — understanding where you stand today across AI platforms. This first scan alone often reveals surprising gaps and opportunities. Ongoing value builds over the first month as you act on the tools' insights and begin tracking improvements. Companies typically report clear actionable insights within the first week and measurable visibility improvements within four to eight weeks of implementing the recommended changes. The tools pay for themselves as soon as they help you identify and close a visibility gap that leads to even one additional qualified lead.
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