[m_eiman]

In the archipelagos near Stockholm and Gothenburg, for example. There's a list of the nationally financed routes here:

https://www.trafikverket.se/resa-och-trafik/farjetrafik/

Then there are regionally and locally financed routes as well.

[nemetroid]

The ferries in that link are all road ferries. Most of them take at least 30 cars, and a lot more than 30 passengers.

Most of the archipelago ferries in Gothenburg take around 300 passengers. The smallest one I could find on Styrsöbolaget's site takes 165:

https://www.styrsobolaget.se/om-oss/fartyg/rivo

[eesmith]

While not a ferry, it looks like Sweden has water taxis.

Looking around I found a few listed at https://visitsweden.com/about-sweden/getting-around-stockhol... , for example, https://www.battaxi.se/our-boats says the m/s Alma ("Our fast all-round boat") carries 20.

I also found https://waxholmwatertaxi.com/services/taxi-boat/?lang=en says "We offer Taxi Boat for 1-12 passengers throughout the Stockholm archipelago."

I can imagine some people might pay good money for significantly faster transport + "eco friendly".

[bertil]

All those are private options for tourists and natural clients for Cadela; they explicitly want to go after the Commuter ferries 80, 82, 83, 89 [0]

Each of those lines has a dozen boats to guarantee frequent service. Including the private options you listed, there are more than 100 boats in Stockholm alone, with 30 passengers or more.

Every city in Scandinavia would likely want something similar; some (Olso, Copenhagen, Helsinki) already have a boat network for commuters and tourists, but every city on that list [1] has a bus network, is around a body of water, and would interested in a non-polluting option.

I’d be surprised if they couldn’t sell thousands for public transport in the region alone — let alone lakes in the Alps, shuttles in the Mediterranean and more.

[0] https://sl.se/en/in-english/getting-around/sl-service-networ...

[1] https://en.wikipedia.org/wiki/List_of_urban_areas_in_the_Nor...