Google Keyword Planner vs Similarweb
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Similarweb is the stronger AI pick in SEO Tools: it has a visibility score of 2.4 versus 2.2 for Google Keyword Planner.
Choose Google Keyword Planner if…
- You need ISO/IEC 27001:2022 covering Google Ads coverage
- You prefer a larger, established vendor (5,000+ employees)
- free keyword research tool
- keyword ideas and search-volume data
Choose Similarweb if…
- You want the brand AI engines rank higher (2.4 vs 2.2)
- 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
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Google Keyword Planner | Similarweb |
|---|---|---|
| Visibility score | 2.2% | 2.4% |
| Change vs last week | New | New |
| Rank in SEO Tools | #26 | #22 |
| Share of voice | 0.5% | 0.9% |
| Mentions this run | 3 | 5 |
| Positive in AI answers | 0% | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Google Keyword Planner 0pp · Similarweb 0pp over 0 weekly runs.
Engine by engine
Similarweb leads on 2 of 3 engines
Head to head in AI answers
0 engine answers name both brands
Features, pricing & fit
| Dimension | Google Keyword Planner | Similarweb |
|---|---|---|
| Pricing model | — | Flat tiers |
| Entry price | — | Contact sales |
| Free plan | — | No |
| Deployment | Web tool accessed inside the Google Ads interface, with no separate installation. | — |
| Compliance | ISO/IEC 27001:2022 covering Google Ads | ISO/IEC 27001:2022, SOC 2 Type 2, SOC 3 |
| Support | — | Email support (support@similarweb.com), Dedicated enterprise support, Sales chat |
| Founded | — | 2009 |
| Headquarters | 1600 Amphitheatre Pkwy, Mountain View, California | New York, NY, United States |
| Employees | 5,000+ | 1,001–5,000 |
| Funding | — | IPO (NYSE) · $240M raised |
| Best for | Advertisers and marketers who run Google Ads and want free keyword research and volume data. | Marketers, researchers, and SEO and PPC teams |
Plans side by side
Google Keyword Planner
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Google Keyword Planner
- free keyword research tool
- keyword ideas and search-volume data
- requires a Google Ads account
Similarweb
- competitive web traffic analysis and market intelligence
- cross-domain traffic sourcing and market share benchmarking
- competitor benchmarking and market research
- free trial and limited free version
- not suited to precise first-party conversion measurement
- ranked behind Google Analytics and Amplitude in one comparison
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Google Keyword Planner vs Similarweb”, https://slateindex.ai/compare/google-keyword-planner-vs-similarweb, data of Nov 2, 2026. Licence: CC BY 4.0.