VoltDB vs YDB
VoltDB
voltactivedata.comYDB
ydb.techSide by side
| Figure | VoltDB | YDB |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 4 |
| Spec score · Distributed SQL Databases | 8.3 (#11) | 7.3 (#17) |
| Deployment | Volt supports on-premises, cloud Kubernetes or VM-based deployments, and hybrid deployments. | YDB can be deployed on premises and on virtual machines with Ansible, or in cloud environments with Kubernetes. |
| Integrations | Documented integrations include Kafka, Kinesis, HDFS, JDBC/ODBC, Elasticsearch and RabbitMQ through import and export capabilities. | The integrations documentation lists DBeaver, DataGrip, Grafana, Apache Airflow, Apache Spark, Kafka API, dbt, SQLAlchemy, and LangChain among supported integrations. |
| Scaling | VoltDB can scale by adding nodes to a cluster, with partitioning automated from the schema. | YDB automatically shards and rebalances data, and compute and storage can scale independently. |
| Support | Production support operates 8:00 am–6:00 pm Eastern Time, with 24×7 telephone coverage for severity-one production incidents. | Commercial support offers a Basic 8×5 ticket service and an Advanced 24×7 service through tickets, chat, and videoconferencing. |
Plans
VoltDB
- Developer EditionFree
- Stream to Decision TrialFree
- Guided EngagementPriced on request
- Guided EngagementPriced on request
YDB
- Managed YDB ServerlessFree
- Open-SourceFree
- EnterprisePriced on request
- Managed YDB DedicatedPriced 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.
YDB
YDB is an open-source distributed SQL database for OLTP, OLAP and streaming workloads. It provides global ACID transactions, strong consistency, automatic sharding and rebalancing, and independent scaling for compute and storage. Columnar tables and a distributed vectorized query engine support analytics. YDB Topics supports Kafka API 3.4.0, exactly-once delivery and automatic partitioning. A native vector index handles approximate nearest-neighbor queries for semantic search, recommendations and retrieval-augmented generation pipelines. Deployments can run on premises, on virtual machines with Ansible, or in cloud environments with Kubernetes. Security includes internal and directory-based external users, plus user and group rights. Integrations listed include DBeaver, DataGrip, Grafana, Airflow, Spark, Kafka API, dbt, SQLAlchemy and LangChain. Open-Source costs nothing under Apache 2.0. Managed Serverless is also free, usage-billed with monthly free allowances.