Cockroach is a distributed key/value datastore which supports ACID transactional semantics and versioned values as first-class features. The primary design goal is global consistency and survivability, hence the name.

Apache Cassandra is described as 'The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance' and is a relational database in the development category. There are more than 50 alternatives to Apache Cassandra for a variety of platforms, including Linux, Windows, Self-Hosted, Mac and SaaS apps. The best Apache Cassandra alternative is PostgreSQL, which is both free and Open Source. Other great apps like Apache Cassandra are MySQL Community Edition, MariaDB, MongoDB and Redis.
Cockroach is a distributed key/value datastore which supports ACID transactional semantics and versioned values as first-class features. The primary design goal is global consistency and survivability, hence the name.

YDB is an open source Distributed SQL Database that combines high availability and scalability with strong consistency and ACID transactions.
Bigtable is a fully managed wide-column and key-value NoSQL database service for large analytical and operational workloads as part of the Google Cloud Platform portfolio.
Spanner is a distributed SQL database management and storage service developed by Google. It provides features such as global transactions, strongly consistent reads, and automatic multi-site replication and failover.
TiDB is an open-source NewSQL database that supports Hybrid Transactional and Analytical Processing (HTAP) workloads. It's MySQL compatible and can provide horizontal scalability, strong consistency, and high availability.
Firestore is a NoSQL document database built for automatic scaling, high performance, and ease of application development. While the Firestore interface has many of the same features as traditional databases, as a NoSQL database it differs from them in the way it describes...

is an open-source distributed NoSQL wide-column data store. It is compatible with Apache Cassandra and supports the same protocols (CQL and Thrift) and file formats (SSTable), as well as the Amazon DynamoDB API, and is based on C++20.


It's a lot faster - and requires much less babysitting wrt admin

Couchbase is the NoSQL database market share leader, with production deployments at AOL, Deutsche Post, NTT Docomo, Salesforce.com, Turner Broadcasting Systems, Zynga and hundreds of other organizations worldwide.
Amazon DynamoDB is a fully managed NoSQL database service offered by Amazon.com as part of the Amazon Web Services portfolio. It was announced by Amazon CTO Werner Vogels on January 18, 2012.OverviewDynamoDB differs from other Amazon services by allowing developers to purchase a...

Amazon Redshift uses SQL to analyze structured and semi-structured data across data warehouses, operational databases, and data lakes, using AWS-designed hardware and machine learning to deliver the best price performance at any scale.


It is a simple replacement with distinct benefits