Stellarcast vs Semrush: which AI visibility tool fits you?
An honest side-by-side of Stellarcast and Semrush AI Visibility Toolkit: what each costs, which engines each plan checks, whether it can fix what it finds, and how it proves results.
Stellarcast is our product, so read this knowing our bias. It is written to be useful anyway, including where Semrush is the better choice. Every fact about Semrush comes from its own pricing and product pages, checked on 26 September 2026; confirm anything that decides your purchase with the vendor.
The short answer
Semrush puts AI visibility next to the SEO data you may already pay for, backed by a very large pre-collected prompt database. Stellarcast is a dedicated loop: it adds Copilot, ships the fixes and proves the lift.
See whether AI engines name you for your category first: get a free visibility audit, no card.
Side by side
| Stellarcast | Semrush AI Visibility Toolkit | |
|---|---|---|
| Pricing | Public: $39, $89, $249, $549/mo; agencies $599 and $1,499/mo | SEO $139/mo (AI search tracking, no prompt quota); Starter (SEO + AI Search) $199/mo (50 prompts a day, 1 domain); Pro+ $299/mo; Advanced and Enterprise custom |
| Engines | Six, daily, on every paid plan: Google AI Overviews, ChatGPT, Gemini, Perplexity, Google AI Mode, Microsoft Copilot (Claude and Grok on Enterprise) | ChatGPT, Perplexity, Gemini and Google Search (its prompt database covers AI Overviews and AI Mode) |
| Fixes shipped to your site | Drafts fixes and, after your approval, sends them to WordPress as drafts (from $89) | Publishing fixes is not described |
| Proof of impact | Lift ledger: every claim labelled MEASURED, LIKELY or TOO-EARLY, with a range | No lift method described on its pricing or product pages |
| Markets | Every market measured separately with native-language prompts, on every plan | Prompt Tracking covers 220+ locations |
| Trial | No trial; free audit with no card | 7-day free trial |
Checked 26 September 2026 against each vendor's own pages; pricing and plans re-checked 17 October 2026.
Where Semrush wins
- One login for SEO and AI visibility, with AI results beside keyword, backlink and rank data.
- A very large pre-collected prompt database (317M+) for instant benchmarking of any domain.
- Prompt research with topic-level volume and difficulty.
- Broad location coverage (220+ countries and territories) and a free plan to start.
Where Stellarcast wins
- Microsoft Copilot included alongside the engines Semrush tracks.
- Fixes drafted and shipped to WordPress after your approval.
- A lift ledger that labels every result MEASURED, LIKELY or TOO-EARLY.
- Agency plans that pool one tracked-prompt allowance across client brands.
How to decide
- Choose Semrush if your team already lives in Semrush and mainly wants AI visibility beside its SEO data.
- Choose Stellarcast if you want gaps fixed and the lift proven, rather than another report to act on. See the plans.
See what AI says about you today
The free audit asks Google AI Overviews, ChatGPT, Gemini and Perplexity the questions buyers in your market ask, and shows where a competitor is named instead of you. No card, no commitment.
Get your free visibility auditFrequently asked questions
Is Stellarcast a Semrush alternative?
Yes. Both track whether AI engines name and cite your brand. Semrush puts AI visibility next to the SEO data you may already pay for, backed by a very large pre-collected prompt database. Stellarcast is a dedicated loop: it adds Copilot, ships the fixes and proves the lift.
How much does Semrush cost compared with Stellarcast?
On 17 October 2026 Semrush's pricing page bundles AI visibility into its plans: SEO at $139 a month includes AI search tracking without a prompt quota, Starter (SEO + AI Search) at $199 a month includes 50 prompts tracked daily on one domain, and Pro+ is $299; the standalone $99 per-domain toolkit we listed on 26 September no longer appears. Stellarcast starts at $39 a month for 15 tracked prompts across six engines.
Which AI engines do Semrush and Stellarcast track?
Semrush's AI Visibility Toolkit covers ChatGPT, Perplexity, Gemini and Google Search, with a prompt database spanning AI Overviews and AI Mode. Stellarcast checks Google AI Overviews, ChatGPT, Gemini, Perplexity, Google AI Mode and Microsoft Copilot, daily, on every paid plan.
Can Semrush publish fixes to my website?
Publishing fixes is not described. Stellarcast drafts fixes and, after your approval, sends them to WordPress as drafts from its $89 Starter plan.