HikariCP

At a glance

• Editor score
  7.9 / 10
• Pricing
  Free plan
• Best for
  JVM applications needing high-performance JDBC pooling
• Free plan
  Yes
• Paid from
  Free
• Transaction pooling
  No
• Facts checked
  14 Nov 2026

• Where it wins

  • Reuses JDBC connections through a configurable DataSource pool
  • Controls pool size, acquisition timeouts, idle behavior, and connection lifetime
  • Integrates with JDBC, Spring Boot, and Hibernate; metrics and JMX are optional

• Where it doesn't

  • Self-hosted embedded deployment requires application-level integration
  • Does not provide transaction pooling
  • Support is centered on community resources and documentation

Our verdict on HikariCP

HikariCP is an open-source JDBC connection-pooling library embedded in Java applications. It maintains reusable database connections and supplies them through a DataSource, avoiding a new physical connection for every request. It is aimed at teams building JVM applications with plain Java, Spring Boot, Hibernate, or other JDBC-compatible frameworks, rather than organizations seeking a hosted database service or standalone database proxy.

The published model is open source with a free plan, so there are no paid tiers to compare. Configuration covers maximum pool size, connection acquisition timeout, idle connection behavior, connection lifetime, keepalive, and validation. The documented maximum pool size has a default of 10, while the actual setting remains configurable. HikariCP works with JDBC drivers and lists compatibility across databases including PostgreSQL, MySQL-compatible MariaDB, Oracle, Microsoft SQL Server, H2, SQLite, and others. Optional pool metrics, health checks, and JMX management beans add visibility and administrative control when those capabilities fit the application stack.

HikariCP’s narrow focus is both its appeal and its boundary. Teams can select a lightweight pooling component and place it directly inside a self-hosted application, but they must handle deployment, configuration, and operational ownership within that application. The library does not provide transaction pooling, hosted operations, or a separate proxy layer. Community support and documentation are the available support channels. Choose HikariCP when a Java application needs configurable JDBC pooling with Spring Boot or Hibernate integration; consider an alternative when you need managed infrastructure, transaction-level pooling, or a standalone service between applications and databases.

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HikariCP pricing

HikariCP fact sheet

HikariCP integrations

HikariCP lists 3 integrations on its own site.

• JDBC
• Spring Boot
• Hibernate

Alternatives to HikariCP

• MMMariaDB MaxScaleSQL-aware pooling and routing for MariaDB and MySQL-compatible production environments.9.3
• OOdysseyA focused, open-source pooler for PostgreSQL session and transaction workloads.9.1
• PgBouncerA self-hosted PostgreSQL pooler with flexible modes and connection controls, but no built-in failover.8.9

See all HikariCP alternatives →

Featured on iTechGuides

HikariCP is listed in our Database Connection Pooling Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

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Last updated 14 Nov 2026 · How we research and update