RadarLLM vs Semrush: which actually measures AI visibility?
Cyril Cretin
Founder RadarLLM.ai
Semrush is the undisputed SEO reference. No one contests that. But in 2026, classic SEO and AI visibility are two distinct disciplines. Semrush recently added an AI module (+$99/mo) to address this reality. RadarLLM, on the other hand, was built from day one for a single mission: measure and fix your visibility on ChatGPT, Perplexity, Gemini and Claude.
The question isn’t "who’s the best SEO tool" — Semrush wins that debate hands down. The question is: who gives you an actionable answer on your AI visibility, with the fix files to act immediately?
What Semrush does well
Semrush built its reputation on 15 years of SEO innovation. Their database of 130M+ AI prompts is impressive. AI Overviews tracking is solid, and the classic SEO foundation (backlinks, rankings, technical audit) remains unmatched in the market.
For marketing teams already subscribed to Semrush who want to add an AI layer to their existing stack, the add-on module makes sense. You stay in an ecosystem you know, with unified reporting.
What Semrush doesn’t do
This is where the approaches fundamentally diverge. Semrush analyzes AI visibility. RadarLLM analyzes AND fixes. Here are the concrete differences.
No fix files generation
Semrush tells you what’s wrong. RadarLLM gives you corrected robots.txt, llms.txt, JSON-LD schemas and meta tags, ready to upload. No intermediate consultant needed.
No real-time LLM queries
RadarLLM actually queries 4 AI engines (ChatGPT, Perplexity, Gemini, Claude) with 10 questions tailored to your industry, asked 3 times each (120 tests). These aren’t estimates from a database: they’re real answers, tested on your audit date.
No one-time payment
Semrush operates exclusively on monthly subscriptions (starting at $139/mo + $99/mo for the AI module). RadarLLM offers a one-time payment from $24.50 (launch offer). You pay for an audit, you get your report and files. No commitment.
No unified AI-Ready score
RadarLLM calculates an AI-Ready score out of 100 combining Performance, SEO, LLM Visibility, AEO, GEO and EEAT with precise weights. One single number to know where you stand.
No deliverable ZIP
Every RadarLLM audit includes a downloadable ZIP with all fix files: custom llms.txt, corrected robots.txt, JSON-LD schemas, optimized meta tags. Semrush leaves you to implement on your own.
Detailed comparison
| RadarLLM | Semrush AI | |
|---|---|---|
| Pricing model | One-time payment | Monthly subscription |
| Entry price | From $24.50 (launch) | $139/mo + $99/mo AI |
| AI engines tested | ChatGPT, Perplexity, Gemini, Claude | ChatGPT, Gemini (AI Overviews) |
| Real LLM queries | 120 real-time tests | 130M+ prompt database |
| Fix files ZIP | Included (llms.txt, robots.txt, schemas...) | Not included |
| robots.txt audit (AI bots) | Analysis + corrected file | Analysis only |
| llms.txt generation | Custom generated | Not available |
| FAQ schema generation | Ready-to-paste JSON-LD (Pro+) | Not available |
| EEAT analysis | Detailed score /100 (Expert) | Partial |
| PDF report | Premium PDF with verbatims | Exportable reports |
| AI-Ready score /100 | Yes (6 weighted modules) | No |
| Best for | SMBs, freelancers, agencies | Large marketing teams |
Who is each tool for?
RadarLLM
- +SMBs and independents who want a quick AI diagnostic
- +SEO freelancers looking for a client-ready deliverable
- +Agencies that want to offer AI audits without building the tool
- +Any business that wants immediate results, not a subscription
- +Tight budget: a one-time audit is enough to get started
Semrush AI
- +Large marketing teams already subscribed to Semrush
- +Businesses that need unified SEO + AI tracking
- +Teams already using the Semrush suite daily
- +Significant marketing budget ($238+/mo minimum)
- +Need for continuous tracking across thousands of keywords
The two tools aren’t in direct competition. Semrush is a Swiss army knife for digital marketing. RadarLLM is a scalpel specialized in AI visibility. If you’re already on Semrush and your budget allows it, the AI module is a solid add-on. If you want a precise AI audit with actionable deliverables and no monthly commitment, RadarLLM is the answer.
The honest verdict
If your priority is AI visibility and you want ready-to-implement fix files for a one-time price, RadarLLM is unbeatable. If you manage a global SEO strategy across hundreds of keywords and budget isn’t a constraint, Semrush + its AI module remains the reference. The best choice depends on your situation, not a generic ranking.