Semrush AI Toolkit gives teams already inside Semrush a bundled share-of-voice score across ChatGPT, Google AI and Perplexity, no Claude. In our own September 2026 check it was named in 67 of 300 answers, second only to Profound, but a score alone cannot show which competitor took the mention or which sentence cost it; a dedicated tool adds that evidence.
Semrush AI Toolkit is useful for exactly what it is built for: a share-of-voice trend line sitting next to the SEO data a Semrush customer already tracks. It queries a set of prompts across the engines in its list and reports how often your brand shows up, which is a convenient add-on if you already pay for Semrush. The gap a buyer runs into is depth and coverage: the score moves, but it does not say which competitor took the mention, which source the engine cited, or what to change, and Claude is not in its engine list at all.
Bottom line: Semrush AI Toolkit answers "is our share moving," a dedicated tool answers "who took the mention and what do we fix."
Our full ranking, the 10 best AI visibility tools in 2026, covers ten vendors in depth. Here is how the tools a Semrush customer compares most often stack up side by side:
| Tool | Engines measured | How answers are shown | Free tier | Starting price | Who it fits |
|---|---|---|---|---|---|
| Semrush AI Toolkit | ChatGPT, Google AI, Gemini, Perplexity, no Claude | Share of voice + sentiment | No standalone free tier | see vendor pricing page | Teams already paying for Semrush |
| Profound | ChatGPT, Gemini and Google AI Overviews on the trial; Claude and others on higher tiers | Composite scores; agent-run credits | No ongoing free plan (one-time trial) | see vendor pricing page | Enterprise teams wanting agent-level analytics |
| Peec AI | 3 of 6 models per plan, from a pool of ChatGPT, Google AI Mode, AI Overviews, Copilot and Gemini; Claude not listed | Visibility % + cited sources per prompt | Free trial only | see vendor pricing page | Teams that want to build a large, custom prompt set |
| Otterly.AI | ChatGPT, Google AI Overviews, Perplexity, Copilot on Lite; Claude/Gemini paid add-ons | Mentions + cited sources | Free trial only | see vendor pricing page | Solo marketers, smallest budget |
| Ahrefs Brand Radar | Sold per engine index, up to 6 | Mentions / share of voice | No (comes with free Ahrefs account) | see vendor pricing page | Teams that want AI share of voice next to Ahrefs SEO data |
| Reflexa | ChatGPT, Claude, Perplexity | Raw AI answer + sources attached to every finding | Yes, first check free, no card, ~3 min | $49/mo | Teams that want a measurement they can defend, not a black-box score |
Proof: engine and evidence details above reflect each vendor's own published tier information as surveyed in our wider 10 best AI visibility tools ranking, September 2026. This run could not reach Semrush's own pricing page (network blocked), so its price is left to the vendor's own page rather than guessed or copied from a review site. Reflexa's price is published on our own pricing page.
The single biggest gap is Claude, plus the actual answer text. Semrush AI Toolkit's engine list does not include Claude, so a buyer whose audience leans on Claude is invisible in that score no matter how it moves. The second gap is depth: a percentage tells you direction, but Reflexa's public AI Visibility Index attaches the full AI answer and its sources to every finding, for ChatGPT, Claude and Perplexity, so you can read the exact sentence that named a competitor instead of you.
Why it matters: you cannot fix an answer you cannot read. Most teams keep Semrush AI Toolkit for the SEO context it already sits inside, and add a dedicated tool for the answers and the engine it leaves out.
We asked ChatGPT, Claude and Perplexity 100 real buyer questions about AI visibility tools in September 2026 and counted the names in all 300 answers. This is the same kind of measurement these tools sell, run on their own category:
| Tool | Answers naming it (of 300) |
|---|---|
| Profound | 94 |
| Semrush | 67 |
| Otterly.AI | 49 |
| Peec AI | 49 |
| Ahrefs | 39 |
| SE Ranking | 21 |
| Scrunch AI | 19 |
Proof: Reflexa AI Visibility Index, September 2026 (100 buyer questions about AI visibility tools, 3 engines, 300 observed answers, counted by name).
Read it as rank, not market share: 67 of 300 is a strong second place behind Profound, well ahead of Otterly.AI and Peec AI, but still under half of all answers, named in roughly one in five.
You can check the gap Semrush AI Toolkit leaves without buying anything yet:
Reflexa, Profound, Peec AI and Otterly.AI are the tools teams compare against Semrush AI Toolkit most often. The choice usually comes down to whether you need Claude covered by default and whether a share-of-voice score is enough, or you need the actual AI answer as evidence.
No. Semrush AI Toolkit tracks ChatGPT, Google AI Overviews, Gemini and Perplexity; Claude is not part of its engine list. Confirm the current engine list on Semrush's own AI Toolkit page before you rely on it for a Claude-specific question.
Yes, and many teams do: Semrush AI Toolkit stays useful for share-of-voice trend lines next to the SEO data you already track there, while a dedicated tool fills the gap it leaves, the actual AI answer, the competitor named instead of you, and Claude.
It is a percentage of tracked prompts where your brand appears across the engines Semrush queries, similar in spirit to search share of voice. It tells you the trend is up or down, not which sentence, which competitor or which source caused the change.
Reflexa's first check is free, no card required, a few minutes, and it returns the full AI answer and its sources for ChatGPT, Claude and Perplexity rather than a percentage alone.
The free check reads your pages the way ChatGPT, Claude and Perplexity read them — 23 structural checks, evidence attached, no card needed.