ActorDB vs TiDB Cloud

ActorDB is an open-source distributed relational SQL database from Biokoda that organizes data into independent actors. SQLite handles SQL queries and LMDB provides storage. Applications connect through the MySQL protocol or Thrift, and the FAQ recommends Thrift; default MySQL drivers also work. ActorDB uses Raft for distributed consensus and write replication, and describes itself as strongly consistent. Transactions can span multiple actors and are described as ACID compliant. It can also provide a sharded key-value store with structured values, multiple columns, and foreign tables. The maker says horizontal scaling can reach hundreds of nodes and petabytes when data is spread across actors. If a server fails, a follower can lead an actor while a cluster majority remains online. Recommended cluster sizes are 1, 3, or 5 nodes. Supported downloads include Windows, Mac OS X, CentOS, and Ubuntu, with version 0.10.29 dated 1 October 2019 shown as the latest stable release.

TiDB Cloud is a managed cloud database service built around an open-source distributed SQL database with MySQL compatibility. It supports transactional and analytical workloads, horizontal scaling, multi-region deployment, and geo-partitioning across Starter, Essential, Premium, and Dedicated plans. Starter includes up to 25 GiB of row storage, 25 GiB of column storage, and 250 million Request Units per month per organization, for up to the first five instances. Its on-demand compute scales to zero when idle, and vector storage and search are in public preview. CSV, Parquet, and SQL file imports are supported across the listed plans. Email and password login, SSO options, private and public endpoints, and console audit logging are listed across all four plans. Prometheus, Grafana, and Datadog integrations are listed for Essential, Premium, and Dedicated in public preview. All users can submit billing and account support tickets; guaranteed technical-ticket response times require paid support plans. The service is available through web and API platforms. Starter is free; the Dedicated plan is listed as starting at $0.22 a month and from $1376 / month.