SuperMassive

What SuperMassive is

SuperMassive is a free, open-source distributed key-value database for in-memory operations. It is designed for durability and low latency, and can be self-hosted on Linux, macOS, or Windows using a prebuilt binary or source build. Data is divided across shards, and adding nodes supports horizontal scaling. Writes are assigned among primary nodes in sequence-based round-robin order; reads run in parallel across primaries and, when needed, replicas. The project describes automatic failover and self-healing after node failures. Timestamp-based version control resolves conflicts by keeping the most recent value. Commands include PUT, GET, DEL, INCR, DECR, REGX, STAT, RCNF, and PING. Nodes record operations in journals, with replicas syncing missing entries from their primary. Client authentication uses usernames and passwords; shared keys secure node communication, and TLS is optional. The BSD-3-Clause project has no transactions and supports only one user, according to its README. Its GitHub repository is archived and read-only as of May 6, 2026.

Who it suits

SuperMassive may suit developers seeking a self-hosted, horizontally scalable key-value database for in-memory operations. Its limits of no transactions and one user, along with its archived status, are important considerations.

Limits

The repository README says SuperMassive has no transactions and supports only one user. GitHub marks the repository archived and read-only as of May 6, 2026.

Getting started

1. Visit https://supermassivedb.com/.
2. Choose a prebuilt binary or source build for Linux, macOS, or Windows.
3. Run it in a self-hosted deployment.
4. Connect using the documented text protocol example through netcat.

Verdict

SuperMassive offers sharding, replication, and failover features in a self-hosted database. Its one-user limit, lack of transactions, and archived repository status may rule it out for some projects.