Semrush's AI Toolkit is not a product you buy on its own; it is bundled into the plans. Ahrefs' Brand Radar is both, sold inside every Ahrefs plan and standalone from $199 with a free Ahrefs account. For most readers the useful question is still the narrow one: if you already pay one of these companies, has that already bought you AI tracking?
For Semrush customers the answer is usually yes. Prompt tracking is bundled into the plans, at 50 prompts a day on Starter, 100 on Pro+ and 200 on Advanced. There is no add-on to buy and nothing to cancel.
For Ahrefs customers the answer looks like yes and mostly is not. Brand Radar is listed as included from the $129 Lite plan, but the prompt allowance that comes with it is 5 tracked prompts, rising to 10 on Standard and 20 on Advanced. That is a taster. Actual tracking is bought separately, either as custom prompt packages from $50 a month or as Brand Radar AI standalone from $199.
So the bundled allowances differ by an order of magnitude: 50 daily prompts on a $165 Semrush plan against 5 on a $129 Ahrefs plan. That single row decides this page for most people.
Ahrefs is better in one respect that matters more than it sounds. It tells you exactly what a unit is. One check is one prompt, on one platform, in one location, and overage is priced openly at $0.020 down to $0.010 per check. Semrush says "50 prompts to track daily" and its pricing page does not state how many platforms that covers, so the same number may not mean the same thing.
Prices read off both vendors' own pages on 24 August 2026. Our own earlier note of a $398 Brand Radar add-on matches nothing published on Ahrefs' site today, and we cannot evidence what changed or when, so this page states only what is currently published.