Which AI to find keywords?

Semrush is the reference for keyword research and competitor analysis.

Can AI write content that ranks?

It helps a lot, but content must stay unique and useful: Surfer SEO and Frase guide optimisation, they don't replace real value.

Is there an affordable AI SEO tool?

Frase and Surfer SEO are more affordable than a full suite like Semrush to start with content optimisation.

Comparison

Best AI for SEO in 2026 (comparison)

For SEO with AI, Semrush remains the all-in-one reference suite (keywords, competition, audit), while Surfer SEO and Frase optimise writing for ranking. Our pick: Semrush for strategy, Surfer SEO to optimise each article.

AI-assisted SEO speeds up keyword research, competitor analysis, on-page optimisation and producing content that ranks. The right tool depends on your need: full suite, text optimisation or audit.

Here's our comparison of the best AI for search.

Our pick of the best AI for SEO

1
SemrushTop pick
The all-in-one SEO & marketing suite, now AI-boosted.
Pricing: From $139.95/moRead the review
2
Surfer SEORecommended
Optimize your content for Google, backed by data.
Pricing: From $79/moRead the review
3
FraseRecommended
SEO briefs and content built from SERP analysis.
Pricing: From $15/moRead the review
4
ClearscopeRecommended
SEO content optimization via clear, reliable grading.
Pricing: Essentials $129/mo · Business $399 · Enterprise on quoteRead the review
5
MarketMuseSolid
AI-driven content strategy and topical authority.
Pricing: Free (limited) · paid (partly contact-sales) — see MarketMuseRead the review
6
Rank PromptSolid
Track and improve your visibility inside AI answers (AEO/GEO).
Pricing: Monthly subscription (free trial)Read the review

Comparison table

Tool	Pricing	Level	Verdict
Semrush	From $139.95/mo	Pro	Top pick
Surfer SEO	From $79/mo	Pro	Recommended
Frase	From $15/mo	Pro	Recommended
Clearscope	Essentials $129/mo · Business $399 · Enterprise on quote	Pro	Recommended
MarketMuse	Free (limited) · paid (partly contact-sales) — see MarketMuse	Pro	Solid
Rank Prompt	Monthly subscription (free trial)	Pro	Solid

How to choose an AI for SEO?

Full suite (keywords, backlinks, audit): Semrush.
Optimise an article for ranking: Surfer SEO and Frase.
Frame content by intent and semantic coverage: Clearscope and MarketMuse.
Budget: SEO suites are an investment; start by targeting a single need.

Frequently asked questions

Which AI to find keywords?: Semrush is the reference for keyword research and competitor analysis.
Can AI write content that ranks?: It helps a lot, but content must stay unique and useful: Surfer SEO and Frase guide optimisation, they don't replace real value.
Is there an affordable AI SEO tool?: Frase and Surfer SEO are more affordable than a full suite like Semrush to start with content optimisation.

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