Canada:

http://www.rewildhomes.com/ (BC Based)

https://www.honomobo.com/ (Edmonton based)

https://www.eastcoastmodern.ca/mod-2 (Halifax based)

https://www.thebackcountryhutcompany.com/ (Vancouver based)

https://www.clickmodular.com/home-1 (BC based)

USA:

https://methodhomes.net/homes/ (Seattle Based)

https://www.plantprefab.com/models (California based)

Blokable: (seattle Based)

https://www.geekwire.com/2019/seattle-housing-startup-blokable-raises-23m-plans-new-california-manufacturing-facility/

https://blokable.com/

https://node.eco/ (Seattle based)

https://modulehousing.com/blog/black-street-development/ Module (Pittsburgh)

Italy: https://madihome.com/faq/

Denmark: https://vipp.com/en/hotel/vipp-shelter

India:

https://www.modcongroup.com/ (Kerala)

UK: https://www.cube-haus.co.uk/how-we-work

Philippines: https://revolutionprecrafted.com/project/dubai/

Link for other companies: https://thecasaclub.com/companies/

Cheers!