Methodology: how we compile our data

Data sources

Our database combines manufacturer specifications, retailer prices, specialist websites, scientific sources and press reports. For every robot, we list the sources used.

Handling conflicting information

When sources disagree, we use the value from the most reliable source (manufacturer before retailer before secondary source) and note the discrepancy under “Pricing details” or “Good to know.” We do not include obviously incorrect values.

Data depth

The “Data depth” metric shows for how many of the 24 core specs verified values are available. It is not a quality rating of the robot, but of the data coverage.

Prices

Prices are recorded in their original currency. Conversions from US dollars to euros use an exchange rate of 0.871 (as of 30.07.2026) and are marked with ≈. Target prices and estimates are labeled as such.

Ranking

The order in the comparison is determined solely by the selected filters and sorting. There are no paid placements.

Badges

Labels such as “Cheapest” or “Longest runtime” are calculated automatically from the data – always within a single category.

Updates and corrections

We check our data regularly. Error reports that include a source are processed within 48 hours.