Sámi religion is reconstructed from a difficult record. Most of what was written down was written by Lutheran missionaries during a campaign to destroy the practice they were describing — drums were seized and burned, sacred sites desecrated, and noaidi prosecuted, at least one executed — so the sources are simultaneously the best evidence available and the work of people committed to ending the thing. Practice also varied widely across Sápmi, which spans four modern states.
What comes through consistently is saivo. Saivo is an other-world located inside the landscape rather than above or below it: in Norway typically within the sacred mountains, in Finland typically beneath particular lakes understood to have a false bottom, with a small hole connecting the visible water to the world underneath. The distinguishing feature of the lakes was that they were exceptionally clear and rich in fish, which was taken as evidence of what lay under them.
The dead there are called saivo-people, and the striking thing is how unremarkable their existence is. They pitch tents. They herd reindeer, hunt, and fish. They live with their families, and the families they live with are the ones they had. There is no torment, no assessment, and no improvement — saivo is not a better place, it is the same life continuing out of sight. Certain families held hereditary relationships with particular saivo mountains and the beings in them, and a noaidi could inherit saivo helping-spirits — a bird, a fish, a reindeer — from a predecessor.
Beside saivo the sources describe Jábmiidáibmu, the realm of the dead ruled by Jábmiidáhkku, the death-mother, and below or beyond that Rota's domain, associated with disease. Jábmiidáibmu is generally reported as the less desirable destination, and the relationship between it and saivo is not consistent across the record — one of many places where the missionary sources flatten regional variation into a single scheme that probably never existed.
The noaidi is the mechanism connecting all of it. Using the runebomme — the frame drum, painted with a map of the worlds — together with joik and rhythm, the noaidi entered trance and travelled: upward to the gods, outward to heal the land, and downward to the dead. The purpose was practical. The dead could be asked why an illness had come, what a hunt required, or whether a sacrifice was owed, and could be bargained with. Sickness was often understood as the dead calling someone, and the noaidi's job was to go and negotiate a substitute.
What the framework offers a comparative atlas is a fully developed afterlife with essentially no eschatology: no end, no judgment, no ascent, no destination that differs in kind from here. The dead moved a short distance and stayed reachable.