The Best Database Connection Pooling Software in 2026
We researched database connection pooling software using official vendor websites, including pricing pages, plan tables, and product documentation. Rankings focus on the category’s core job: reusing connections to reduce database load and improve application throughput, alongside value for money and verified features. Compare application-embedded and standalone poolers, including products with transaction pooling.
Our top picks
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Top ranked
MariaDB MaxScale#1 of 299.3/10SQL-aware pooling and routing for MariaDB and MySQL-compatible production environments.
Pricing on request · 30-day trial
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Runner-up
Odyssey#2 of 299.1/10A focused, open-source pooler for PostgreSQL session and transaction workloads.
Free plan
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Top-ranked free plan
PgBouncer#3 of 298.9/10A self-hosted PostgreSQL pooler with flexible modes and connection controls, but no built-in failover.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 29 tools, best first
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Best forEnterprise MariaDB/MySQL connection routing and pooling
SQL-aware pooling and routing for MariaDB and MySQL-compatible production environments.
Pricing on request · 30-day trial Our MariaDB MaxScale verdict → Visit MariaDBFor vendors Sponsor this spot · #1 · $149/mo →9.3/10★★★★★Visit MariaDB -
Best forPostgreSQL transaction and session pooling
A focused, open-source pooler for PostgreSQL session and transaction workloads.
- Transaction pooling
9.1/10★★★★★Visit Odyssey -
Best forMature PostgreSQL pooling deployments
A self-hosted PostgreSQL pooler with flexible modes and connection controls, but no built-in failover.
8.9/10★★★★☆Visit PgBouncer -
Best forJava applications needing free embedded JDBC pooling
An embeddable, open-source JDBC pool with configurable capacity, validation and cleanup.
8.7/10★★★★☆Visit Apache DBCP -
Best forJDBC pooling with monitoring and XA support
A configurable JDBC pool with asynchronous acquisition, JMX monitoring and XA support.
8.5/10★★★★☆Visit Apache Tomcat -
Best forReactive apps connecting to supported SQL databases
A free, self-hosted Java client library for reactive SQL access and application-level pooling.
8.4/10★★★★☆Visit Eclipse Vert.x -
Best forPostgreSQL apps needing sync and async pools
An open-source Python pool with synchronous and asynchronous PostgreSQL support.
8.3/10★★★★☆Visit Psycopg Pool -
Best forSQL Server and Azure SQL applications
A free embedded .NET driver with default client-side pooling for SQL Server and Azure SQL.
8.2/10★★★★☆Visit Microsoft -
Best forPython teams wanting pooling with ORM and SQL tools
A broad Python database toolkit that includes pooling, transactions, SQL construction, and ORM.
8.0/10★★★★☆Visit SQLAlchemy -
Best forEmbedded database deployments with connection modes
A flexible Java database with multiple connection modes, but not a dedicated connection pooler.
7.9/10★★★★☆Visit H2 Database -
Best forJVM applications needing high-performance JDBC pooling
Free, configurable JDBC pooling for Java applications running in your own environment.
7.9/10★★★★☆Visit HikariCP -
Best forPostgreSQL pooling with HA and read balancing
A self-hosted PostgreSQL traffic layer with pooling, read balancing and failover.
7.8/10★★★★☆Visit Pgpool-II -
Best forMySQL/PostgreSQL pooling with query control
An open-source, self-hosted proxy for pooling and controlling MySQL and PostgreSQL traffic.
7.7/10★★★★☆Visit ProxySQL -
Best forPostgreSQL pooling with sharding and failover
A PostgreSQL proxy for pooling connections, routing queries, and managing replicas and shards.
7.6/10★★★★☆Visit PgDog -
Best forPostgreSQL pooling with routing and replicas
A self-hosted PostgreSQL pooler with routing, replica balancing, and failover.
- Transaction pooling
7.5/10★★★★☆Visit PgCat -
Best forPostgreSQL .NET applications
A PostgreSQL-focused .NET driver that pools connections inside each application.
7.4/10★★★★☆Visit Npgsql -
Best forPython apps using asyncio with PostgreSQL
An open-source asyncio library for managing reusable PostgreSQL connections in Python apps.
7.3/10★★★★☆Visit asyncpg -
Best forGo PostgreSQL services needing lifecycle controls
A Go-embedded pool with lifecycle controls and PostgreSQL-specific features.
7.2/10★★★★☆Visit pgxpool -
Best forNode.js applications using PostgreSQL
An embedded PostgreSQL pool for Node.js, with configurable client management and lifecycle controls.
7.1/10★★★★☆Visit node-postgres -
Best forCross-platform .NET MySQL connectivity
A free, cross-platform .NET driver with configurable pooling and MySQL-compatible database support.
7.0/10★★★★☆Visit MySqlConnector -
Best forSmall Node.js MySQL applications
A free, embedded MySQL pool API for Node.js, with callback and promise interfaces.
6.9/10★★★☆☆Visit mysql2 Pool -
Best forPHP coroutine MySQL or PostgreSQL pooling
A focused, open-source pool component for concurrent PHP database clients.
6.8/10★★★☆☆Visit OpenSwoole -
Best forJVM teams wanting configurable embedded pooling
An embedded Java pool with practical controls for connection lifecycle and monitoring.
6.7/10★★★☆☆Visit Agroal -
Best forJDBC pooling with diagnostics and Hibernate
An open-source, embedded JDBC pool with diagnostics and Java framework integrations.
6.6/10★★★☆☆Visit Vibur -
Best forLegacy JVM JDBC pooling with statement caching
An open-source, self-hosted JDBC pool for Java apps that need tuning and statement caching.
6.5/10★★★☆☆Visit c3p0 -
Best forNode.js teams pooling generic resources
An open-source Node.js pool for general resources, including configured database connections.
6.4/10★★★☆☆Visit Tarn.js -
Best forJava teams pooling database connections or other objects
A flexible Java object-pooling library, not a database-specific connection pooler.
6.3/10★★★☆☆Visit site -
Best forCross-engine schema comparison workflows
A cross-engine schema comparison CLI, not a database connection pooler.
5.8/10★★★☆☆Visit DBC -
Best forRust SQL migration and CI workflows
A Rust-focused SQL migration tool, not a clear choice when connection pooling is the main need.
5.2/10★★★☆☆Visit sqlx-cli
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Transaction pooling | Deployment model | Supported databases | Score |
|---|---|---|---|---|---|---|---|
| 1 | MariaDB MaxScale | No | Both | MariaDB Server, MySQL-compatible servers, ColumnStore, Enterprise Cluster, MongoDB protocol | 9.3 | ||
| 2 | Odyssey | Yes | Free | Yes | Standalone | PostgreSQL, Apache Cloudberry | 9.1 |
| 3 | PgBouncer | Yes | Free | PostgreSQL | 8.9 | ||
| 4 | Apache Commons DBCP | Yes | Free | No | Embedded | JDBC-compatible databases | 8.7 |
| 5 | Tomcat JDBC Connection Pool | Yes | Free | No | Both | 8.5 | |
| 6 | Vert.x Reactive SQL Clients | Yes | Free | No | Embedded | PostgreSQL, MySQL, MariaDB, IBM DB2, Microsoft SQL Server | 8.4 |
| 7 | Psycopg Pool | Yes | Free | No | Embedded | PostgreSQL | 8.3 |
| 8 | Microsoft.Data.SqlClient | Yes | Free | No | Embedded | SQL Server; Azure SQL | 8.2 |
| 9 | SQLAlchemy | Yes | Free | 8.0 | |||
| 10 | H2 Database Engine | Yes | Free | Both | 7.9 | ||
| 11 | HikariCP | Yes | Free | No | Embedded | Apache Derby, Firebird, Google Spanner, H2, HSQLDB, IBM DB2, IBM Informix, Microsoft SQL Server, MariaDB, Oracle, OrientDB, PostgreSQL, SAP MaxDB, SQLite, Sybase | 7.9 |
| 12 | Pgpool-II | Yes | Free | PostgreSQL | 7.8 | ||
| 13 | ProxySQL | Yes | Free | MySQL protocol, PostgreSQL protocol, MySQL, PostgreSQL, MariaDB, Percona Server for MySQL, ClickHouse | 7.7 | ||
| 14 | PgDog | Yes | Free | Both | PostgreSQL | 7.6 | |
| 15 | PgCat | Yes | Free | Yes | Standalone | PostgreSQL | 7.5 |
| 16 | Npgsql | Yes | Free | No | Embedded | PostgreSQL | 7.4 |
| 17 | asyncpg Pool | Yes | Free | No | Embedded | PostgreSQL | 7.3 |
| 18 | pgxpool | Free | No | Embedded | PostgreSQL | 7.2 | |
| 19 | node-postgres Pool | Yes | Free | No | Embedded | PostgreSQL | 7.1 |
| 20 | MySqlConnector | Yes | Free | No | Embedded | MySQL, MariaDB, Amazon Aurora, Azure Database for MySQL, Google Cloud SQL for MySQL, Percona Server | 7.0 |
| 21 | mysql2 Pool | Yes | Free | No | Embedded | MySQL | 6.9 |
| 22 | OpenSwoole Connection Pool | Yes | Free | No | Embedded | MySQL, PostgreSQL; PDO client factory shown | 6.8 |
| 23 | Agroal | Yes | Free | No | Embedded | 6.7 | |
| 24 | Vibur DBCP | Yes | Free | No | Embedded | 6.6 | |
| 25 | c3p0 | Yes | Free | No | Embedded | 6.5 | |
| 26 | Tarn.js | Yes | Free | No | Embedded | 6.4 | |
| 27 | Apache Commons Pool | Free | No | Embedded | 6.3 | ||
| 28 | DBC | Free | 5.8 | ||||
| 29 | sqlx-cli | Free | 5.2 |
Head-to-head All 28 comparisons →
- MariaDB MaxScale vs Odyssey
- MariaDB MaxScale vs PgBouncer
- MariaDB MaxScale vs Apache Commons DBCP
- MariaDB MaxScale vs Tomcat JDBC Connection Pool
- MariaDB MaxScale vs Vert.x Reactive SQL Clients
- MariaDB MaxScale vs Psycopg Pool
- MariaDB MaxScale vs Microsoft.Data.SqlClient
- Odyssey vs PgBouncer
- Odyssey vs Apache Commons DBCP
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How we rank database connection pooling software
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Last updated · How we research and update