The International Longshore and Warehouse Union has approximately 42,000 members in over 60 local unions in the states of California, Washington, Oregon, Alaska and Hawaii. An additional 3,500 members belong to the Inlandboatmen's Union of the Pacific, which constitutes the Union's Marine Division. Another 14,000 members belong to the autonomous ILWU Canada.

ILWU is using PaperThin's flagship product CommonSpot for their content management needs.