ElephantSQL

vs

Heroku Postgres

Azure Cosmos DB is a non-relational NoSQL database trusted by leading enterprises globally. With Azure Cosmos DB you can run No-ETL analytics over real-time operational data and run near-real time analytics and AI on the operational data within your NoSQL database, to reduce time to insight.

MemSQL is a free and open-source all-in-one relation database management system. The database lends itself for operational analytics and AI/ML-powered applications that requires fast data ingest, high performance queries and elastic scaling. MemSQL supports ANSI SQL and blended workloads, commonly referred to as translytical, HTAP, HOAP, and ATP workloads. The developer MemSQL Inc, also provides commercially hosted version of the database called MemSQL Helios, a cloud database-as-a-service.

Amazon DynamoDB is a key-value and document database that delivers single-digit millisecond performance at any scale. The database is fully managed, multiregion, multimaster, and durable with built-in security, backup and restore, and in-memory caching for enterprise-scale applications. Amazon DynamoDB is part of Amazon Web Services and integrates well with other cloud-based AWS products.