SemrushThe unified SEO and AI search solution

SimilarwebAI-powered digital data intelligence for market, competitive and consumer insights.

Comparison · SEO Tools · weekly run Nov 2

Semrush vs Similarweb

Which one do AI engines recommend, and how do they differ on price, fit and features?

The short answer

Semrush is the stronger AI pick in SEO Tools: it has a visibility score of 64.3 versus 2.4 for Similarweb, and ranks ahead in 100% of the answers that name both.

Choose Semrush if…

You want the brand AI engines rank higher (64.3 vs 2.4)
You want a free plan to start
AI answers describe it more positively (49% vs 0% positive)
Widely recommended as a top-tier all-in-one platform for broad suites

Choose Similarweb if…

You need ISO/IEC 27001:2022 or SOC 2 Type 2 or SOC 3 coverage
competitive web traffic analysis and market intelligence
cross-domain traffic sourcing and market share benchmarking
competitor benchmarking and market research

AI visibility side by side

Latest weekly run · Nov 2

Metric	Semrush	Similarweb
Visibility score	64.3%	2.4%
Change vs last week	New	New
Rank in SEO Tools	#1	#22
Share of voice	12.3%	0.9%
Mentions this run	63	5
Positive in AI answers	49%	0%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

Semrush 0pp · Similarweb 0pp over 0 weekly runs.

Engine by engine

Semrush leads on 3 of 3 engines

ChatGPT

77%

5.7%

AI Mode

64.3%

1.3%

Perplexity

51.7%

SemrushSimilarweb

Head to head in AI answers

5 engine answers name both brands

5Semrush ranked higher

0Similarweb ranked higher

Prompt	Engine	Semrush	Similarweb
What should an SEO tool integrate with?	ChatGPT	#5	#7
Compare the leading SEO Tools platforms	ChatGPT	#1	#5
Which SEO Tools vendors do analysts recommend?	AI Mode	#1	#6
Which SEO tool offers a free trial?	ChatGPT	#1	#5
Official website of the top SEO tool vendors	ChatGPT	#1	#6

Features, pricing & fit

Dimension	Semrush	Similarweb
Pricing model	Flat tiers	Flat tiers
Entry price	Free; paid from $139 / mo	Contact sales
Free plan	Yes	No
Compliance	—	ISO/IEC 27001:2022, SOC 2 Type 2, SOC 3
Support	Help Center and Basic Onboarding, Enterprise SLA and 24/7 support, Dedicated account manager	Email support (support@similarweb.com), Dedicated enterprise support, Sales chat
Founded	2008	2009
Headquarters	Boston, MA	New York, NY, United States
Employees	1,001–5,000	1,001–5,000
Funding	IPO	IPO (NYSE) · $240M raised
Best for	Freelancers and small businesses through to agencies and enterprises managing multiple brands, regions and teams.	Marketers, researchers, and SEO and PPC teams