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Visibility Index: Sistrix and Alternatives

Lucas BlochbergerUpdated 12 June 2026
Definition

The Visibility Index (Sistrix SI) is the DACH standard metric for measuring overall organic search visibility of a domain. It aggregates ranking data across a representative keyword set to provide a single benchmark number.

Key Takeaways

  • The SISTRIX Visibility Index is the DACH standard metric for organic visibility, based on one million keywords and 100 million data points, weighted by search volume and click probability.
  • The index measures visibility, not traffic, conversions or revenue. It shows trends and competitive relationships, not absolute business figures.
  • Tool indices are proprietary and not comparable with each other. SISTRIX, Semrush Visibility, Ahrefs, Xovi OVI and Conductor each use their own keyword sets and logic; only trends within one tool are comparable.
  • Zero-click searches and AI Overviews decouple position and click. In the EU, around 59.7 percent of searches end without a click, and for AI Overview queries, organic CTR drops from 1.76 to 0.61 percent.
  • Custom visibility metrics from Google Search Console (impressions, position, share of voice) and GA4 are often more meaningful for B2B and niches than a generic tool index.
  • AI visibility is becoming a new dimension: AI Answer Inclusion Rate and brand mentions in ChatGPT and Perplexity complement classic reporting, as brands cited in AI Overviews receive 35 percent more organic clicks.
  • In Austria, Google holds an 81.87 percent search engine market share, which is why the AT-specific index should be used rather than the DE index.

The visibility index is the standard metric for SEO benchmarking in the DACH region.

Sistrix Visibility Index

Sistrix measures a domain's rankings weekly for hundreds of thousands of keywords and weights them by search volume and position. The result is a single index value. Advantages: Historical data since 2008, comparability between domains, detection of Google update impacts.

Alternatives

Searchmetrics SEO Visibility: Similar principle, different keyword basis. Semrush Visibility Index: Integrated into the Semrush suite. Ahrefs Traffic Value: Estimates the monetary value of organic traffic.

Limitations

The visibility index is based on a defined keyword set. Niche websites with very specific keywords can have a low index even though they rank well for their keywords. The index measures classic Google visibility, not AI visibility. Geo-monitoring requires supplementary tools.

Data & Statistics

SISTRIX erhebt eine Million Keywords mit 100 Millionen Datenpunkten und gewichtet nach Suchvolumen und Klickwahrscheinlichkeit der Position

SISTRIX (2024)

Position 1 erzielt eine durchschnittliche CTR von 27,6 % (Analyse von 4 Mio. Suchergebnissen)

Backlinko (2023)

59,7 % der Google-Suchen in der EU enden ohne Klick

SparkToro / Rand Fishkin (Datos, a Semrush Company) (2024)

68,01 % der Google-Suchen in den USA endeten in den ersten vier Monaten 2026 ohne Klick

Search Engine Land (SparkToro / Similarweb-Clickstream) (2026)

Organische CTR bei AI-Overview-Suchanfragen fällt von 1,76 % auf 0,61 % (-61 %); 3.119 Suchanfragen, 42 Organisationen, 25,1 Mio. organische Impressionen (Juni 2024 - September 2025)

Search Engine Land (Seer Interactive Studie) (2025)

In AI Overviews zitierte Marken erzielen 35 % mehr organische und 91 % mehr Paid-Klicks

Search Engine Land (Seer Interactive Studie) (2025)

96,55 % aller Seiten erhalten keinen Google-Traffic, 1,94 % nur 1-10 Besuche pro Monat (Studienbasis ~14 Mrd. Seiten)

Ahrefs Blog (2023)

Google hält 81,87 % Suchmaschinen-Marktanteil in Österreich (Mai 2026)

StatCounter Global Stats (2026)

FAQ

What is the visibility index explained simply?
The visibility index summarizes a domain's organic visibility in Google search results in a single number. It combines the rankings of thousands of keywords with their search volume and the expected click probability per position. The best known in the DACH region is the SISTRIX Visibility Index.
How does SISTRIX calculate the visibility index?
SISTRIX collects search results for one million keywords, generating 100 million data points. These are then weighted by the keyword's search volume and the click probability at the measured organic position. High search volumes and top positions therefore contribute significantly more to visibility.
Does a high visibility index also mean more traffic?
Not necessarily. The index measures visibility, not actual visits, conversions or revenue. Due to zero-click searches and AI Overviews, position can remain stable or increase while actual click-through rate declines. In the EU, around 59.7 percent of searches already end without a click.
What alternatives to the SISTRIX Visibility Index exist?
Common alternatives include Semrush Visibility, Ahrefs with traffic-oriented logic, Xovi OVI, and the former Searchmetrics SEO Visibility, now part of Conductor. Values from different tools are not directly comparable because each provider uses its own keyword set and calculation logic. Only trends within one tool are comparable.
How do I measure visibility with my own data from GSC and GA4?
Google Search Console provides impressions and average position for exactly your pages, creating a domain-specific visibility baseline. From this, you can derive your own share of voice on strategic keywords. GA4 then establishes the connection to conversions and shows whether visibility also generates business value.
How reliable is the visibility index for B2B and niches in Austria?
For small, specialized keyword sets, the tool index is often unstable because the standardized provider keyword set barely covers the niche. For the Austrian market, the Austrian index (google.at) should always be used, not the German one. Custom GSC metrics are usually more meaningful in these cases.
How do AI Overviews affect the visibility index?
AI Overviews decouple position and click. According to an international study, organic CTR for AI Overview queries drops from 1.76 to 0.61 percent. The classic index does not capture this because its CTR model does not account for this shift. This is why AI visibility via AI Answer Inclusion Rate and brand mentions is gaining importance.

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