VoltDB

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Score7.1

Rank#3 of 24

PriceFree

Free planYes

Free trialYes

Runs onAPI, Linux, macOS, Self-hosted, Web

Summary

VoltDB is a distributed, in-memory database and real-time decisioning layer for processing data, ingesting streams, running business logic, and integrating AI. Its database partitions data and stored procedures so queries can run in parallel while retaining ACID consistency. Volt Active Data says the system is built to move from data ingest to action in under 10 milliseconds. Clusters can scale by adding nodes, with partitioning automated from the schema. VoltDB 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 adds 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 also listed for Confluent users. Production pricing is available on request.

Who it is for

VoltDB is aimed at companies building or modernizing mission-critical applications, including in financial services, telecommunications, and enterprise technology. It may suit teams working with streaming data that need low-latency decisions across supported deployment types.

What is good

Processes queries in parallel while retaining ACID consistency.
Clusters can scale by adding nodes.
Connects to Kafka or CDC streams.
Supports on-premises, cloud, and hybrid deployment.

What to know first

Free Developer Edition is not for production workloads.
Security is disabled by default.
Production pricing is available on request.

Verdict

VoltDB combines stream ingestion and database processing for low-latency decisioning, with several deployment choices. Teams should account for the production restriction on the free edition and enable security controls as needed.

VoltDB plans and pricing

All plans

Developer Edition Free individual developers and early exploration · local or cloud · sample apps, tutorials and docs · no infrastructure required voltactivedata.com · 30 Sept 2026

Stream to Decision Trial Free Confluent users · Kafka stream connection · pre-built Docker templates · free to use for 30 days voltactivedata.com · 30 Sept 2026

Guided Engagement Not published defined use cases and production timelines · 12-week paid engagement · production deployment · customer success manager voltactivedata.com · 30 Sept 2026

Compared on in-memory databases

Free plan: Novoltactivedata.com
Deployment model: bothvoltactivedata.com
Horizontal scaling: Yesvoltactivedata.com
Multi-region deployment: Yesvoltactivedata.com

Facts

Product role: Volt Active Data describes Volt as a real-time decisioning layer combining in-memory data processing, streaming ingest, business logic and AI integration.voltactivedata.com · 30 Sept 2026
Latency: The company says Volt is built to move from ingest to action in under 10 milliseconds.voltactivedata.com · 30 Sept 2026
Database model: VoltDB is a distributed, in-memory database that partitions data and stored procedures so queries can run in parallel while retaining ACID consistency.docs.voltactivedata.com · 30 Sept 2026
Scaling: VoltDB can scale by adding nodes to a cluster, with partitioning automated from the schema.docs.voltactivedata.com · 30 Sept 2026
Durability: VoltDB Enterprise Edition provides command logging, locally replicated partitions (K-safety) and wide-area database replication for durability and high availability.docs.voltactivedata.com · 30 Sept 2026
Streaming integrations: Volt connects directly to Kafka or CDC streams and can expose decisions through SQL, REST or Kafka topics.voltactivedata.com · 30 Sept 2026
Deployment: Volt supports on-premises, cloud Kubernetes or VM-based deployments, and hybrid deployments.voltactivedata.com · 30 Sept 2026
Operating systems: 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.docs.voltactivedata.com · 30 Sept 2026
Security controls: VoltDB supports user authentication and authorization with roles, and TLS/SSL or Kerberos for communications; security is disabled by default.community.voltactivedata.com · 30 Sept 2026
Developer limitation: The Developer Edition is free to use but is not intended for production workloads.voltactivedata.com · 30 Sept 2026
Support: Volt provides a support portal for submitting and managing support tickets.voltactivedata.com · 30 Sept 2026
Target users: Volt says it works with companies building or modernizing mission-critical applications, including financial services, telecommunications and enterprise technology.voltactivedata.com · 30 Sept 2026
Current release: VoltDB release notes list version 15.3.1 dated September 15, 2026.university.voltactivedata.com · 30 Sept 2026