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NimbleSEO vs Semrush AI Visibility Toolkit

Semrush is better at suite familiarity and third-party discovery data: a 289M-prompt database and the classic Semrush toolset around it, with genuinely good data-source documentation. NimbleSEO differs on statistical honesty (intervals + inconclusive instead of a 0–100 score alone), per-engine capture disclosure, and a lower-entry one-bill SEO+GEO plan.

All comparisons How to read vendor claims

Vendor sources reviewed Jul 10, 2026 against Semrush AI Visibility Toolkit’s own public pages (linked per row) — tell us if something changed: security@nimbleseo.ai. Units are defined per vendor and never silently equated.

Dimension	NimbleSEO	Semrush AI Visibility Toolkit	Stronger
Discovery data at market scale	Prompt discovery from your own first-party sources plus expansion; no 289M-prompt third-party database. evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility	"Over 289 million prompts and responses" across ChatGPT/Gemini/AIO/AI Mode, updated daily, 40+ regional databases — documented in their KB. source¹ · checked Jul 10, 2026	Them
Uncertainty disclosure	Where eligible, nominal 95% descriptive Wilson intervals over estimated effective run counts, a descriptive next-window compatibility check, and inconclusive labels. Sparse or unsupported populations may withhold intervals. evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility	AI Visibility is a 0–100 benchmark score; the metrics KB documents what each metric measures but discloses no sample sizes or confidence intervals as of the checked date. source² · checked Jul 10, 2026	NimbleSEO
Capture-fidelity disclosure	Every engine’s capture mode published and registry-bound (/capture). evidence: src/lib/geo/engines/index.ts (engineCaptureDisclosures) + /capture	Engine list (ChatGPT, Google AI, Gemini, Perplexity) with data-source docs, but no per-engine capture-method (API vs grounded vs UI) disclosure on the checked pages. source³ · checked Jul 10, 2026	NimbleSEO
Pricing shape	Public plans start with Starter at €29 or $29/month (EUR for euro-area billing; USD elsewhere), including the SEO lane; every allowance and hard stop is published on one page, with optional prepaid credit packs priced separately. evidence: src/lib/pricing.ts + /pricing (published hard limits & optional prepaid packs)	AI Toolkit $99/month per domain billed annually with 25 daily custom prompts; extra users/reports/lead-gen are priced add-ons. source⁴ · checked Jul 10, 2026	NimbleSEO
Data-source documentation	Methodology + capture pages document sampling and capture modes; smaller doc surface than theirs today. evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility	Dedicated KB pages document each database, update cadence, and metric definitions on the cited pages. source⁵ · checked Jul 10, 2026	Tie

Vendor sources

https://www.semrush.com/kb/1607-semrush-ai-visibility-data (checked Jul 10, 2026)
https://www.semrush.com/kb/1594-ai-seo-metrics (checked Jul 10, 2026)
https://www.semrush.com/pricing/ai/ (checked Jul 10, 2026)
https://www.semrush.com/pricing/ai/ (checked Jul 10, 2026)
https://www.semrush.com/kb/1607-semrush-ai-visibility-data (checked Jul 10, 2026)

NimbleSEO vs Semrush AI Visibility Toolkit

Dimension

NimbleSEO

Semrush AI Visibility Toolkit

Stronger

Discovery data at market scale

Prompt discovery from your own first-party sources plus expansion; no 289M-prompt third-party database.

evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility

"Over 289 million prompts and responses" across ChatGPT/Gemini/AIO/AI Mode, updated daily, 40+ regional databases — documented in their KB.

source¹ · checked Jul 10, 2026

Them

Uncertainty disclosure

Where eligible, nominal 95% descriptive Wilson intervals over estimated effective run counts, a descriptive next-window compatibility check, and inconclusive labels. Sparse or unsupported populations may withhold intervals.

evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility

AI Visibility is a 0–100 benchmark score; the metrics KB documents what each metric measures but discloses no sample sizes or confidence intervals as of the checked date.

source² · checked Jul 10, 2026

NimbleSEO

Capture-fidelity disclosure

Every engine’s capture mode published and registry-bound (/capture).

evidence: src/lib/geo/engines/index.ts (engineCaptureDisclosures) + /capture

Engine list (ChatGPT, Google AI, Gemini, Perplexity) with data-source docs, but no per-engine capture-method (API vs grounded vs UI) disclosure on the checked pages.

source³ · checked Jul 10, 2026

NimbleSEO

Pricing shape

Public plans start with Starter at €29 or $29/month (EUR for euro-area billing; USD elsewhere), including the SEO lane; every allowance and hard stop is published on one page, with optional prepaid credit packs priced separately.

evidence: src/lib/pricing.ts + /pricing (published hard limits & optional prepaid packs)

AI Toolkit $99/month per domain billed annually with 25 daily custom prompts; extra users/reports/lead-gen are priced add-ons.

source⁴ · checked Jul 10, 2026

NimbleSEO

Data-source documentation

Methodology + capture pages document sampling and capture modes; smaller doc surface than theirs today.

evidence: src/lib/marketing/methodology-copy.ts + /methodology/ai-visibility

Dedicated KB pages document each database, update cadence, and metric definitions on the cited pages.

source⁵ · checked Jul 10, 2026

Tie