Platform.sh

Platform.sh SAS is a French company founded in 2010 and registered in Paris under RCS B 521 496 059, with co-founder Frédéric Plais as président and statutory auditors appointed. The French register carries Upsun as its trade name. The group’s impressum states that it operates through wholly owned subsidiaries, listing Platform.sh, Inc. of Michigan among them — the French SAS is the parent, not the other way round.

The company rebranded its flagship platform from Platform.sh to Upsun in September 2025; platform.sh now redirects to upsun.com and one set of terms covers both. Its terms make the French SAS the residual contracting entity, with named-country carve-outs including a California-law clause that applies only to United States billing.