Every comparison article tells you to normalise by tracked prompts and engines rather than comparing headline prices. This does that arithmetic. It's a planning estimate, not a quote.

• Cost per tracked prompt is the real total divided by prompts × brands. It's the only way two plans with different limits can be compared honestly.
• Engine coverage is a hard filter. If a tool cannot track an engine you selected at any price, it's excluded rather than shown as cheap.
• Tier selection picks the cheapest plan that covers both your prompt count and your engine count, adding prompt top-ups where a tool sells them.
• Required base subscriptions are added in. Some AI modules only work on top of a paid SEO suite, which the sticker price never mentions.
• Per-domain pricing is multiplied by your brand count — the single biggest trap for agencies.
• Seats beyond a plan's included users are charged where the vendor charges for them.
• Prices are approximate, published self-serve rates and change often. Enterprise tiers are custom-quoted and shown as such. Verify before committing budget.