vendor lock-in → exit plan
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Databases

Best IBM Db2 alternatives

Ranked by migration effort. Open any path for a full cost model and plan.

1
MariaDB
Free (optional support) · open source
Medium effort
~15 wks →
2
Microsoft SQL Server
Per-core + Software Assurance · commercial
High effort
~18 wks →
3
PostgreSQL
Free (optional support) · open source
High effort
~18 wks →
4
MySQL
Free CE / paid editions · open source
High effort
~18 wks →
5
Amazon Aurora
Managed usage-based · commercial
High effort
~18 wks →
6
MongoDB
Per-node / Atlas usage · commercial
High effort
~18 wks →
7
CockroachDB
Free core / Enterprise · open source
High effort
~18 wks →
8
Oracle Database
Per-core perpetual + support · commercial
High effort
~21 wks →