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IBM Db2 alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll database management systems

Top picks

Common reasons people leave IBM Db2: paid editions and managed plans are expensive next to open-source databases, and community edition is capped at 4 CPU cores and 16 GB memory. We ranked 4 alternatives by how directly each one replaces IBM Db2, then by reviews, real visits and how recently each app's facts were checked against its own website. PostgreSQL currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1PostgreSQL logoPostgreSQLOpen source—YesLinux, macOS, Windows +15 of 583.8
2MySQL logoMySQLOpen source—YesLinux, Windows, macOS +14 of 464.8
3MariaDB logoMariaDBOpen source—YesLinux, Windows, macOS +14 of 461.8
4Oracle Autonomous AI Lakehouse logoOracle Autonomous AI LakehouseFree plan + paid—NoWeb5 of 548.9
  1. PostgreSQL logo

    1. PostgreSQLTop pick

    Best for: Developers and teams who want a free, standards-minded relational database that scales with their app.

    Open sourceSelf-hostableLinux, macOS, Windows, Self-hosted

    83.8

    score / 100

    Why switch from IBM Db2

    Free, open-source and widely supported, with enterprise features and many managed hosting options.

    Pros

    • Strong SQL standards support and full ACID transactions
    • Rich types: JSONB, arrays, ranges, plus PostGIS for maps
    • Highly extensible with custom types and functions
    • Permissive licence and community governance, not one vendor

    Cons

    • Running replication, failover and major upgrades yourself takes expertise
    • Connection handling often needs a pooler under heavy load
    • No official GUI; you pick a separate client
    Visit PostgreSQL Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is PostgreSQL a good IBM Db2 alternative?

    Verified facts

    5 of 5 verified
    License
    PostgreSQL License (BSD/MIT-like)
    Checked Nov 8, 2026postgresql.org(opens source in a new tab)
    Origins
    1986, UC Berkeley POSTGRES project
    Checked Nov 8, 2026postgresql.org(opens source in a new tab)
    ACID-compliant
    Since 2001
    Checked Nov 8, 2026postgresql.org(opens source in a new tab)
    JSON support
    JSON/JSONB
    Checked Nov 8, 2026postgresql.org(opens source in a new tab)
    Platforms
    Linux, macOS, Windows, BSD, Solaris
    Checked Nov 8, 2026postgresql.org(opens source in a new tab)
  2. MySQL logo

    2. MySQL

    Best for: Web developers who want the most widely hosted SQL database, especially for PHP and WordPress apps.

    Open sourceSelf-hostableLinux, Windows, macOS, Self-hosted

    64.8

    score / 100

    Why switch from IBM Db2

    Popular open-source database with cheap managed hosting and a huge developer community.

    Pros

    • Supported by nearly every host, cloud and framework
    • Free GPL Community Edition with replication and clustering
    • Official GUI in MySQL Workbench

    Cons

    • Some features are reserved for paid Enterprise editions
    • Controlled by Oracle rather than a community foundation
    • Fewer advanced data types and SQL features than PostgreSQL
    Visit MySQL Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is MySQL a good IBM Db2 alternative?

    Verified facts

    4 of 4 verified
    License
    GPL (Community Edition)
    Checked Nov 8, 2026mysql.com(opens source in a new tab)
    Free edition
    Community Edition
    Checked Nov 8, 2026mysql.com(opens source in a new tab)
    High availability
    Group Replication, InnoDB Cluster
    Checked Nov 8, 2026mysql.com(opens source in a new tab)
    Platforms
    20+ incl. Linux, Windows, Mac
    Checked Nov 8, 2026mysql.com(opens source in a new tab)
  3. MariaDB logo

    3. MariaDB

    Best for: Teams running MySQL-style apps who want a community-governed, GPL database server.

    Open sourceSelf-hostableLinux, Windows, macOS, Self-hosted

    61.8

    score / 100

    Why switch from IBM Db2

    Open-source MySQL fork with enterprise support available, a common target for leaving commercial databases.

    Pros

    • Largely MySQL-compatible, so migrations are usually easy
    • Governed by a foundation rather than a single vendor
    • Regular LTS releases and built-in vector search

    Cons

    • Has drifted from recent MySQL versions in some features
    • Several release tracks (LTS, rolling, preview) can confuse
    • Smaller extension ecosystem than PostgreSQL
    Visit MariaDB Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is MariaDB a good IBM Db2 alternative?

    Verified facts

    4 of 4 verified
    License
    GPL-2.0
    Checked Nov 1, 2026github.com(opens source in a new tab)
    Origin
    Fork of MySQL by original MySQL team members
    Checked Nov 1, 2026github.com(opens source in a new tab)
    LTS releases
    Yes
    Checked Nov 8, 2026mariadb.org(opens source in a new tab)
    Vector search
    MariaDB Vector
    Checked Nov 1, 2026mariadb.org(opens source in a new tab)
  4. Oracle Autonomous AI Lakehouse logo

    4. Oracle Autonomous AI Lakehouse

    Best for: Oracle shops that want a managed analytics warehouse without running database administration

    Free plan + paidWeb

    48.9

    score / 100

    Why switch from IBM Db2

    Oracle's managed cloud database for analytics, for enterprises weighing another commercial vendor.

    Pros

    • Patching, backups, tuning and scaling are handled by the service
    • Full Oracle SQL compatibility for teams with existing Oracle skills
    • Can run in Oracle Cloud or on Exadata in your own data centre
    • Always Free tier for small experiments

    Cons

    • Best value only if you are already committed to Oracle
    • Oracle pricing and licensing are harder to estimate than simpler rivals
    • Recent renaming means older docs and guides use different product names
    Visit Oracle Autonomous AI Lakehouse Details and reviews
    How this score is calculated
    Editorial fit ×0.341
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Oracle Autonomous AI Lakehouse a good IBM Db2 alternative?

    Verified facts

    5 of 5 verified
    Formerly
    Autonomous Data Warehouse
    Checked Nov 8, 2026docs.oracle.com(opens source in a new tab)
    Database administration
    Not required
    Checked Nov 8, 2026docs.oracle.com(opens source in a new tab)
    Free tier
    Two Always Free databases
    Checked Nov 8, 2026docs.oracle.com(opens source in a new tab)
    Free tier storage
    20 GB per database
    Checked Nov 8, 2026docs.oracle.com(opens source in a new tab)
    On-premises option
    Exadata Cloud@Customer
    Checked Nov 8, 2026docs.oracle.com(opens source in a new tab)

The best IBM Db2 alternative for…

The highest-ranked app in this list for each need.

PostgreSQL logo

Best IBM Db2 alternative for most people

PostgreSQL

Free, open-source and widely supported, with enterprise features and many managed hosting options.

MySQL logo

Best IBM Db2 alternative for a free option

MySQL

Popular open-source database with cheap managed hosting and a huge developer community.

Oracle Autonomous AI Lakehouse logo

Best IBM Db2 alternative for a free plan you can upgrade

Oracle Autonomous AI Lakehouse

Oracle's managed cloud database for analytics, for enterprises weighing another commercial vendor.

MariaDB logo

Best IBM Db2 alternative for open source

MariaDB

Open-source MySQL fork with enterprise support available, a common target for leaving commercial databases.

PostgreSQL logo

Best IBM Db2 alternative for self-hosting

PostgreSQL

Free, open-source and widely supported, with enterprise features and many managed hosting options.

PostgreSQL logo

Best IBM Db2 alternative for Mac

PostgreSQL

Free, open-source and widely supported, with enterprise features and many managed hosting options.

PostgreSQL logo

Best IBM Db2 alternative for Windows

PostgreSQL

Free, open-source and widely supported, with enterprise features and many managed hosting options.

PostgreSQL logo

Best IBM Db2 alternative for Linux

PostgreSQL

Free, open-source and widely supported, with enterprise features and many managed hosting options.

Oracle Autonomous AI Lakehouse logo

Best IBM Db2 alternative for working in the browser

Oracle Autonomous AI Lakehouse

Oracle's managed cloud database for analytics, for enterprises weighing another commercial vendor.

IBM Db2 alternatives: common questions

What is the best alternative to IBM Db2?

PostgreSQL ranks first right now. Free, open-source and widely supported, with enterprise features and many managed hosting options. MySQL and MariaDB follow it in our ranking.

IBM Db2 vs PostgreSQL: what's the difference?

IBM Db2 is free with paid plans; PostgreSQL is free and open source. PostgreSQL is open source and IBM Db2 is not. Only IBM Db2 runs on Web. Only PostgreSQL runs on macOS.

Is IBM Db2 free?

IBM Db2 is free with paid plans. Starting price (SaaS): USD 630/month. Checked on IBM Db2's own site, November 2026.

Is there a free alternative to IBM Db2?

Yes. PostgreSQL (open source), MySQL (open source), MariaDB (open source) and Oracle Autonomous AI Lakehouse (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to IBM Db2?

Yes: PostgreSQL, MySQL and MariaDB. PostgreSQL, MySQL and MariaDB can also be self-hosted.

Which IBM Db2 alternatives work on Linux?

PostgreSQL, MySQL and MariaDB run on Linux.

Why do people switch from IBM Db2?

The complaints we hear most: paid editions and managed plans are expensive next to open-source databases; community edition is capped at 4 CPU cores and 16 GB memory; much smaller developer community and tooling ecosystem than PostgreSQL or MySQL.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces IBM Db2, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.