It depends on the kind of detachment you're looking for. We do custom software and cloud-agnostic migrations (so hosting of cloud software, not standard software like Office 365 but we do offer/suggest alternatives for some software, e.g., self-hosted Gitlab instead of Github).

We have been looking at the European market and migrated our own stuff away from US providers to European #Scaleway. We're advising our customers (mid-large Dutch companies) on similar migrations, and have the past decade advocated for using standards-based cloud services to facilitate switching (e.g., using Kubernetes over ACS or ECS and plain Postgres over Aurora).