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Head-to-head · Google Algorithm Tracking Tools

Similarweb SERP Seismometer vs SISTRIX

  • Updated Nov 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Similarweb SERP Seismometer #4 in Google Algorithm Tracking Tools 8.6/10 Free plan Free plan✓ 1 of 3 features Visit Similarweb
SISTRIX #7 in Google Algorithm Tracking Tools 8.3/10 14-day trial Free trial✓ 0 of 3 features Visit SISTRIX

Similarweb SERP Seismometer leads on 1 check, SISTRIX 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 SISTRIX
  • Most featuresSimilarweb SERP Seismometer · 1 of 3

Similarweb SERP Seismometer scores higher on our rubric for google algorithm tracking tools: 8.6 against 8.3 out of 10; our editors rank them #4 and #7.

Similarweb SERP Seismometer offers free plan; SISTRIX doesn't.

Similarweb SERP Seismometer is the better fit for free desktop and mobile SERP volatility monitoring. SISTRIX is the better fit for teams needing historical visibility and rank tracking.

  • Similarweb SERP Seismometer fits best

    Free desktop and mobile SERP volatility monitoring

  • SISTRIX fits best

    Teams needing historical visibility and rank tracking

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Side by side

Feature Similarweb SERP Seismometer 8.6/10 Visit ↗ SISTRIX 8.3/10 Visit ↗
At a glance
Editor score 8.6 8.3
Ranking #4 in Google Algorithm Tracking Tools #7 in Google Algorithm Tracking Tools
Best for Free desktop and mobile SERP volatility monitoring Teams needing historical visibility and rank tracking
Pricing model Free Paid
Starting price Free plan €119/mo
Free plan ✓ (best) —
Free trial — 14 days
Deployment Cloud Cloud
Platforms Web Web
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Similarweb SERP Seismometer 1/3 · SISTRIX 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
Pros
  • 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
  • Daily rank tracking by country-language combination and device
  • Historical domain visibility data, with over 11 years on Professional
  • Combines keyword, competitor, backlink and technical site analysis
Cons
  • Does not track individual site rankings
  • Focuses on volatility rather than broader SEO work
  • Available as a web tool, with cloud deployment
  • Starts at €119 per month, with no free plan
  • Advanced API access and full data history require higher tiers
  • Enterprise pricing is custom
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 →

SISTRIX brings visibility tracking and a wider set of SEO research tools together in a browser-based platform. Teams can track rankings by country-language combination and device, examine domain visibility over time, research keywords,…

Read the review →
  1. Similarweb SERP SeismometerGoogle Algorithm Tracking Tools 8.6Free plan
  2. SISTRIXGoogle Algorithm Tracking Tools 8.314-day trial

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

  • SISTRIX — where it wins

    • Daily rank tracking by country-language combination and device
    • Historical domain visibility data, with over 11 years on Professional
    • Combines keyword, competitor, backlink and technical site analysis

    Where it doesn't

    • Starts at €119 per month, with no free plan
    • Advanced API access and full data history require higher tiers
    • Enterprise pricing is custom
  • Similarweb SERP Seismometer8.6/10 · Free plan

    A free, focused way to monitor Google ranking turbulence across desktop and mobile.

    Visit SimilarwebFull verdict →
  • SISTRIX8.3/10 · 14-day trial

    A broad SEO toolkit with historical visibility data, priced for teams that need depth.

    Visit SISTRIXFull verdict →

More comparisons

All google algorithm tracking tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Last updated · How we research and update