The 30-second verdict
Pick SISTRIX if you work in Europe, particularly the German-speaking markets. Its data quality in those countries is the reason it has held its position against much larger competitors, and the Visibility Index is quoted in German SEO the way DR and DA are quoted in English. That recognition has practical value in client work and pitching.
Pick Ahrefs if you work in English-language search or you need link data. Ahrefs' index is generally regarded as the largest and freshest of any tool we review, its keyword database is deeper globally, and it carries data for search engines beyond Google including YouTube and Amazon, which SISTRIX does not attempt.
There is a scenario where you buy both, and European agencies genuinely do: SISTRIX for visibility reporting and market monitoring, Ahrefs for link prospecting.
Pricing: read the currency before you compare
SISTRIX START is €119 a month plus tax for 1 user, 3 projects, 3 months of data history, 30,000 URLs crawled monthly, 2,500 SERP updates and 10,000 results per analysis. It is a genuine entry plan with real constraints, and the 3-month data history is the one that surprises people, since long-term trend analysis is SISTRIX's signature strength and START barely gives you any.
PLUS at €239 is where the tool becomes itself: 3 users, 15 projects, 5 years of history, 500,000 URLs crawled, 15,000 SERP updates, content projects and Visibility Index API access. PROFESSIONAL at €419 opens the complete 13-year history, 6 users and full API access. Extra users cost €24.90 each on the PLUS, PROFESSIONAL and PREMIUM tiers, and extra projects run from €5.90 to €9.90 depending on plan.
Ahrefs Lite is $129 with 5 projects, 750 tracked keywords, 100,000 crawl credits and 1,000 research credits per user. Standard is $249 with uncapped research credits and 20 projects. Extra seats are $40 a month on Lite, $60 on Standard.
Seats are where SISTRIX pulls ahead for teams. PLUS includes 3 users inside €239 and extras cost €24.90. Ahrefs Standard includes 1 user at $249 and charges $60 for each additional. A three-person team pays €239 on SISTRIX PLUS, plus tax, against $369 on Ahrefs Standard. Convert before you conclude, since €239 is more than $239 at most recent rates.
SISTRIX offers a free test on START and PLUS. Ahrefs does not advertise a free trial.
The Visibility Index versus Domain Rating
These measure different things and it is worth being precise about it, because the comparison is often made badly.
The SISTRIX Visibility Index estimates how visible a domain is in search results, calculated from its rankings across a large fixed keyword set weighted by search volume and expected click-through. It moves when your rankings move. It is a performance measure, and its value is the history behind it: SISTRIX has tracked it for many years and sells access to a complete 13-year history on its upper tiers, which is why German SEOs use it to date algorithm updates and diagnose traffic losses.
Ahrefs' Domain Rating estimates link authority on a 0-to-100 scale from the strength of linking domains. It is an input measure. It barely moves week to week and it tells you nothing about whether you are actually ranking.
So they are not competing metrics. If you want to answer "did we lose visibility in March and when exactly," SISTRIX answers it and Ahrefs does not. If you want to answer "is this site strong enough to be worth a link from," DR answers it and the Visibility Index does not.
Where each one's data is stronger
SISTRIX's edge is European market depth. Its German index is the most thorough of any tool, and its coverage across other European markets is strong. It also includes JavaScript and mobile crawling, content marketing tools from PLUS up, plagiarism checks, and a workflow layer of reports, dashboards, lists and alerts that suits agency reporting.
Ahrefs' edge is link data and global keyword coverage. Its crawler feeds what is generally regarded as the largest index in the category, Site Explorer is the fastest way to take apart a competitor's profile, and Keywords Explorer carries data for search engines beyond Google. In English-language markets its keyword database is deeper than SISTRIX's.
Neither tool is trying to be the other. SISTRIX is a visibility and market-monitoring platform with SEO tooling attached. Ahrefs is a link and keyword research platform with monitoring attached.
Our verdict
Buy SISTRIX if you work in German-speaking or wider European search, or if your reporting is built on visibility trends over time. Start on PLUS at €239 rather than START, because 3 months of data history undercuts the reason you are buying the tool. Take the free test first, which Ahrefs does not advertise.
Buy Ahrefs if you work in English-language markets or backlinks are central to the job. Budget for Standard at $249 rather than Lite, since the Lite credit cap is the most common first-month complaint. Our Ahrefs review covers what the credits actually buy.
If your budget will not stretch to either, Mangools at $18.85 a month on annual billing handles keyword research well, and Moz Pro from $49 offers a friendlier route, with a 7-day trial on its $99 Standard plan. Our best SEO tools roundup ranks the field, and Ahrefs against Majestic covers the link-specialist option.