1. Alibaba Cloud

   Operational and analytical databases plus a wide range of cloud-based services.

2. AWS

   AWS Cloud offers a broad range of fully managed database services, including RDS, Aurora, DynamoDB, and Redshift.

3. Cloudera

   Cloudera Data Hub, Cloudera Data Warehouse, and Cloudera Machine Learning cloud services.

4. Databricks

   The Data Intelligence Platform, built on the Lakehouse architecture, available on Microsoft Azure, AWS, and Google Cloud.

5. Google Cloud

   Google Cloud Platform supports many database platform-as-a-service (DBaaS) products, including Cloud SQL, Spanner, and BigQuery.

6. Huawei Cloud (GaussDB)

   GaussDB, Huawei's enterprise-grade distributed relational database, offered in a range of cloud services.

7. IBM Cloud

   IBM Db2 on Cloud, Db2 Warehouse on Cloud, IBM Cloud SQL Query, and IBM Cloudant.

8. InterSystems IRIS

   The InterSystems IRIS Data Platform, available across major public and private clouds.

9. Microsoft Azure

   Azure Synapse Analytics, Azure SQL Database, Azure SQL Managed Instance, Azure Cosmos DB, and more.

10. Oracle Cloud

    Oracle Autonomous Transaction Processing and Autonomous Data Warehouse services.

11. Redis Enterprise Cloud

    Redis Enterprise Cloud on AWS, GCP, and Microsoft Azure, plus Redis Enterprise Software on-premises.

12. Snowflake

    The Snowflake AI Data Cloud platform, available on AWS, GCP, and Microsoft Azure.

13. TencentDB

    CynosDB, a distributed RDBMS compatible with MySQL and PostgreSQL, plus TBase.

14. Teradata Vantage

    A unified set of analytics capabilities, including graph processing, machine learning, and text processing.

15. CockroachDB

    A distributed cloud SQL database giving apps effortless scale, resilience, and low-latency performance for users anywhere.

16. Couchbase Capella

    A fully managed database-as-a-service that's fast, flexible, and cost-effective.

17. Exasol

    The in-memory database built for high-performance analytics.

18. MariaDB

    Made by the original developers of MySQL and guaranteed to stay open source; part of most cloud offerings and the default in most Linux distributions.

19. MarkLogic

    A multi-model cloud database, now part of Progress Software, built for simplifying complex, mission-critical data.

20. SingleStore

    An all-in-one database for operational analytics and AI/ML-powered applications, with fast data ingest and elastic scaling.