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XTDB

xtdb.com

From $166.67/mo Free plan WebAPISelf-hosted
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Spec score 7.6 #25 of 36 in Data Version Control Tools

Spec sheet

Purpose
XTDB is an immutable SQL database designed to simplify development, reporting, and compliance for systems that need historical records.Read 7 Oct 2026 · xtdb.com
Audience
The maker describes XTDB as useful for augmenting existing applications and building new applications that need auditability and historical state.Read 7 Oct 2026 · xtdb.com
Deployment
XTDB can run using Docker and is also available for on-premises deployment and through cloud marketplaces.Read 7 Oct 2026 · xtdb.com
Integrations
XTDB supports Apache Kafka as a message log and Kafka Connect as an external source.Read 7 Oct 2026 · docs.xtdb.com
Support
The maker offers annual production support subscriptions, community support, consulting, and training.Read 7 Oct 2026 · xtdb.com
License
XTDB is free to use and open source under the MPL license.Read 7 Oct 2026 · docs.xtdb.com
Headquarters
London, United KingdomRead 28 Sep 2026 · xtdb.com
Authentication
XTDB supports a single root user, a configured user list, and OpenID Connect authentication providers.Read 7 Oct 2026 · docs.xtdb.com
Bitemporal history
XTDB records bitemporal history so users can query data across valid time and system time.Read 7 Oct 2026 · docs.xtdb.com
Schema
XTDB supports flexible schema and first-class handling of semi-structured data.Read 7 Oct 2026 · xtdb.com
SQL
XTDB supports SQL:2011 temporal queries and a rich SQL dialect through FlightSQL and PostgreSQL wire compatibility.Read 7 Oct 2026 · xtdb.com
Storage and compute
XTDB uses an object-store LSM-tree design and Apache Arrow for temporal analytics and scale-out compute.Read 7 Oct 2026 · xtdb.com
Transactions
XTDB supports PostgreSQL-compatible SERIALIZABLE SQL transactions with optimistic concurrency.Read 7 Oct 2026 · xtdb.com

Plans and prices

Partner Pack Free $0/year Community support · Private Zulip stream · Early access to releases · Feedback channel · Partner network Read 7 Oct 2026 · xtdb.com
Developer Edition $2,000 a year $2k/year Partner Pack features · Official support · Private issue tracker · Upgrade guidance · UK business hours response SLA Read 7 Oct 2026 · xtdb.com
Production Support Priced on request Developer Edition features · Private release channels · Rapid hotfix service · Core team consultations · 24/7 SLA Read 7 Oct 2026 · xtdb.com

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Where Specifiction places it

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