Head-to-head · Google Algorithm Tracking Tools
Similarweb SERP Seismometer vs Keyword.com
Similarweb SERP Seismometer leads on 1 check, Keyword.com on 0, and 1 is even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreSimilarweb SERP Seismometer · 8.6/10
- Free planonly Similarweb SERP Seismometer
- Free trialonly Keyword.com
- Most featuresSimilarweb SERP Seismometer · 1 of 3
Similarweb SERP Seismometer scores higher on our rubric for google algorithm tracking tools: 8.6 against 8.4 out of 10; our editors rank them #4 and #6.
Similarweb SERP Seismometer offers free plan; Keyword.com doesn't.
Similarweb SERP Seismometer is the better fit for free desktop and mobile SERP volatility monitoring. Keyword.com is the better fit for budget-conscious teams tracking Google visibility.
- Similarweb SERP Seismometer fits best
Free desktop and mobile SERP volatility monitoring
- Keyword.com fits best
Budget-conscious teams tracking Google visibility
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Side by side
| Feature | Similarweb SERP Seismometer 8.6/10 Visit ↗ | Keyword.com 8.4/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 8.6 | 8.4 |
| Ranking | #4 in Google Algorithm Tracking Tools | #6 in Google Algorithm Tracking Tools |
| Best for | Free desktop and mobile SERP volatility monitoring | Budget-conscious teams tracking Google visibility |
| Pricing model | Free | Paid |
| Starting price | Free plan | $3/mo |
| Free plan | ✓ (best) | — |
| Free trial | — | 14 days |
| Deployment | Cloud | Cloud |
| Platforms | Web | Web |
| Built for | Solo, Small business, Mid-market, Enterprise | Small business, Mid-market, Enterprise |
| Features Similarweb SERP Seismometer 1/3 · Keyword.com 0/3 | ||
| Update alerts | Not checked yet | Not checked yet |
| Volatility index | ✓ (best) | Not checked yet |
| SERP feature tracking | Not checked yet | Not checked yet |
| Specs | ||
| Location views | Not checked yet | Not checked yet |
| Device views | Both | Not checked yet |
| History retention | Not checked yet | Not checked yet |
| Our review | ||
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| Our verdict | Similarweb SERP Seismometer is a free web tool for SEO professionals and site owners who want to spot periods of turbulence in Google search results. It monitors fluctuations across more than 10,000 domains and keywords daily, then… Read the review → |
Keyword.com centers on tracking Google search visibility for SEO teams, agencies, consultants, SaaS and ecommerce companies, and multi-location businesses. It follows rankings by keyword, location, device, and search engine, with… Read the review → |
Strengths and trade-offs
Similarweb SERP Seismometer — where it wins
- Tracks daily volatility across 10,000+ monitored domains and keywords
- Shows separate desktop and mobile volatility views
- Includes risk levels and 30- and 90-day averages
Where it doesn't
- Does not track individual site rankings
- Focuses on volatility rather than broader SEO work
- Available as a web tool, with cloud deployment
Keyword.com — where it wins
- Tracks Google rankings by location, device, SERP feature, and AI Overview
- Includes API access and Google Looker Studio integration on Search Visibility
- Adds AI citations, sentiment, and competitor monitoring on higher tiers
Where it doesn't
- No permanent free plan; the trial lasts 14 days
- Search Visibility starts with a 50-keyword limit
- Dedicated rank tracking does not include site audits or backlink analysis
- Similarweb SERP Seismometer8.6/10 · Free plan
A free, focused way to monitor Google ranking turbulence across desktop and mobile.
Visit SimilarwebFull verdict → - Keyword.com8.4/10 · 14-day trial
A focused Google visibility tracker with reporting, API access, and optional AI monitoring.
Visit Keyword.comFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Last updated · How we research and update