Otterly tells you AI mentioned you. Attrifast tells you what it earned.

For one specific job, yes; for another, no. Otterly is a mature AI search monitoring suite — it tracks how visible your brand is across ChatGPT, Google AI Overviews, Perplexity, and Copilot at prompt level, across 50+ countries. If that monitoring depth is what you need, Otterly is genuinely strong and Attrifast is not a drop-in replacement. If the question you actually need answered is 'what is our AI traffic worth in revenue' — which engine sends paying customers, at what conversion rate, for how many Stripe dollars — that is the job Attrifast was built for and the one a monitoring tool structurally cannot do.

Otterly measures presence: which prompts mention you, your share of voice, which sources AI engines cite. Attrifast measures money: a 4kb first-party script detects AI-referred sessions (including the majority that land in GA4's Direct bucket after the referrer is stripped), and a server-side Stripe webhook join credits each payment to the engine that sent the customer. Otterly's outputs are visibility scores and citation lists; Attrifast's outputs are revenue per visitor, conversion rate, and MRR per AI engine. They answer different questions from different data.

Not with payment-verified data. Otterly's own July 2026 study on measuring AI search conversions used signup surveys — asking new users how they heard about the product — and found Claude driving 10.6% of signups while Google Analytics showed 0.1%. That survey method proves the attribution gap exists, but it stops at the signup: it cannot say which signups became paying customers or what they spent, and it depends on who answers the survey. Attrifast closes the same gap from the transaction side, joining the AI-referred session to the actual Stripe payment on the server.

Attrifast is $15/mo flat with every engine included — ChatGPT, Perplexity, Claude, and Gemini detection plus the Stripe revenue join. Otterly starts at $29/mo (Lite) for 15 tracked prompts across 4 engines — ChatGPT, Google AI Overviews, Perplexity, and Microsoft Copilot — with Claude, Gemini, and Google AI-Mode available as paid add-ons; Standard is $189/mo and Premium $489/mo, with extra prompt packs at $99 per 100. The comparison is not really price-per-feature — the products do different jobs — but at the entry tier, Attrifast is cheaper with all engines included, while Otterly meters by prompt count and engine add-ons.

Yes, and the combination is coherent: they instrument different ends of the same funnel. Otterly tells you whether AI engines mention and cite you (the visibility side); Attrifast tells you what the resulting traffic earns (the revenue side). A team investing seriously in AI search could use monitoring to steer content work and attribution to justify the budget. If you only have room for one and you run on Stripe, our bias is obvious but the logic is simple: start with the tool that reports in dollars, because that is the number the budget conversation runs on.