We found 2 fonts on https://sigma-global.com/en/index.html

CachedRecheck
a
1 Styles

Sigma Sans

Designed by Letters from Sweden & Stockholm Design Lab, Letters from Sweden
h2
p
a
div
7 Styles

Sigma Serif

Designed by Letters from Sweden + Stockholm Design Lab

FontofWeb by Simdi Jinkins & Onyemsobi