According to Bounce data, these are the most prominent metro networks in Europe, and Lisbon is in the Top 10.

The metro networks of 19 European capitals were scored according to different metrics such as the number of stations, annual passengers, distance travelled, Google review scores, and the percentage of positive and negative online reactions to articles about each metro system, among others.

Oslo, the capital of Norway, tops the list with 101 metro stations in its transport network. In 2023, it became the world's first metro system entirely powered by electricity.

As the largest network in Scandinavia, Oslo's metro stations have an average score of 4.13 out of 5 stars on Google reviews, with users often saying they are “very well organized” and “easy to navigate”.

Sofia (Bulgaria) occupies second place, having the newest metro system among European capitals, created in 1998. The Madrid Metro comes in fourth place, with a score of 6.74 points.

The London Underground, built in 1863, holds the title of the oldest system in the world and occupies sixth place with 6.04 points. It is on track to be completely powered by renewable energy by 2030. Soon after on the list, in 7th position, Lisbon appears with 5.97 points.

On the other hand, the Metro lines with the worst ratings are those in Rome (3.75), Brussels (3.20) and Budapest (3.13). Some tube stations were described by passengers as "quite unpleasant", with cleanliness often cited as a major concern.