KeyDB vs VoltDB
KeyDB
keydb.devVoltDB
voltactivedata.comSide by side
| Figure | KeyDB | VoltDB |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | — | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 0 | 4 |
| Spec score · In-Memory Databases | 7.4 (#19) | 8.2 (#8) |
| Deployment | Officially managed download options include Docker images, Ubuntu and Debian packages, CentOS RPM packages, and source builds. | Volt supports on-premises, cloud Kubernetes or VM-based deployments, and hybrid deployments. |
| Founded | 2019 | 2009 |
| Integrations | Because KeyDB is Redis-compatible, the maker says Redis client libraries can also be used with KeyDB. | Documented integrations include Kafka, Kinesis, HDFS, JDBC/ODBC, Elasticsearch and RabbitMQ through import and export capabilities. |
| Operating systems | The documentation says Linux and macOS are developed and tested, recommends Linux for deployment, and notes there is no official Windows build support. | Production VoltDB databases support Debian 12.11 or later, RHEL 8.8 or later, Rocky Linux 8.8 or later and Ubuntu 20.04, 22.04 or 24.04; macOS 13 or later is supported for development. |
| Scaling | KeyDB supports horizontal scaling through active replication or cluster mode with a sharded dataset. | VoltDB can scale by adding nodes to a cluster, with partitioning automated from the schema. |
| Support | Support is community-based and managed by the KeyDB team at Snap; the maker says paid support services are unavailable. | Production support operates 8:00 am–6:00 pm Eastern Time, with 24×7 telephone coverage for severity-one production incidents. |
Plans
VoltDB
- Developer EditionFree
- Stream to Decision TrialFree
- Guided EngagementPriced on request
- Guided EngagementPriced on request
In their own words
VoltDB
VoltDB is a distributed, in-memory database and real-time decisioning layer for data processing, stream ingestion, business logic, and AI integration. Its database partitions data and stored procedures so queries can run in parallel while maintaining ACID consistency. Volt Active Data says Volt is built to move from ingest to action in under 10 milliseconds. Clusters scale by adding nodes, with partitioning automated from the schema. Volt connects directly to Kafka or CDC streams and can expose decisions through SQL, REST, or Kafka topics. It supports on-premises, cloud Kubernetes or VM-based, and hybrid deployments. Production databases support Debian 12.11 or later, RHEL 8.8 or later, Rocky Linux 8.8 or later, and Ubuntu 20.04, 22.04, or 24.04; macOS 13 or later is supported for development. Enterprise Edition provides command logging, locally replicated partitions, and wide-area database replication. Authentication, role-based authorization, and TLS/SSL or Kerberos communications are available, but security is disabled by default. The free Developer Edition is not intended for production workloads. A free 30-day trial is listed for Confluent users; production pricing is on request.