Are there any managed relational database services that focus on migrating from on-premises databases?

Yes. Several managed relational database services and migration-oriented offerings are specifically designed to help move from on-premises databases to the cloud.

A few examples:

• AWS Database Migration Service (DMS) + Amazon RDS / Aurora

  • AWS DMS helps migrate databases with minimal downtime.
  • Common for moving from Oracle, SQL Server, MySQL, PostgreSQL, and others into managed AWS databases.

• Google Cloud SQL / AlloyDB with Database Migration Service

  • Google Cloud’s Database Migration Service supports migrations from on-prem or other cloud databases into Cloud SQL and AlloyDB.
  • Focuses on reducing downtime during cutover.

• Azure SQL Database / Azure SQL Managed Instance + Azure Database Migration Service

  • Microsoft has strong tooling for moving on-prem SQL Server databases into managed Azure SQL services.
  • Azure SQL Managed Instance is especially aimed at lift-and-shift migrations from on-prem SQL Server.

• Oracle Cloud Autonomous Database / Oracle Base Database Service

  • Oracle provides migration tools and programs for moving on-prem Oracle databases to OCI.
  • Often used by customers modernizing Oracle workloads without changing database engines.

• IBM Db2 on Cloud + migration tools

  • IBM offers managed Db2 services and migration assistance for Db2 workloads moving off-premises.

If you want vendors that are especially migration-focused, the strongest examples are usually:

• Azure SQL Managed Instance for SQL Server migrations
• AWS DMS for broad heterogeneous migrations
• Google Cloud Database Migration Service for cloud migration simplicity
• Oracle OCI migration tooling for Oracle-heavy environments

If you'd like, I can also give you:

1. a comparison table by source database type, or
2. the best option depending on whether you’re migrating Oracle, SQL Server, MySQL, or PostgreSQL.