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 how AI engines describe your brand 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 | AI Visibility Toolkit $99/mo per domain (25 prompts, 1 user); Semrush One from $199/mo; 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, Google AI Mode, AI Overviews, Gemini, Perplexity |
| Fixes shipped to your site | Drafts fixes and, after your approval, ships them to WordPress or Shopify (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 | 18 markets, each measured with native-language prompts, on every plan | Prompt Tracking covers 220+ locations |
| Trial | No trial; free audit with no card | 7-day Semrush One trial (card taken); none on the toolkit alone |
Checked 26 September 2026 against each vendor's own pages.
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 five engines Semrush tracks.
- Fixes drafted and shipped to WordPress or Shopify after your approval.
- A lift ledger that labels every result MEASURED, LIKELY or TOO-EARLY.
- Agency plans with unlimited client brands on one pooled allowance.
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?
Semrush's AI Visibility Toolkit is $99 a month per domain for 25 prompts and one user; Semrush One plans start at $199. Stellarcast starts at $39 a month for 15 tracked prompts across six engines. Checked 26 September 2026.
Which AI engines do Semrush and Stellarcast track?
Semrush's AI visibility tools cover ChatGPT, Google AI Mode, AI Overviews, Gemini and Perplexity. Stellarcast checks those plus 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, ships them to WordPress or Shopify from its $89 Starter plan.