whichdb
vs

Software AG Adabas vs IBM Db2

Software AG Adabas: Inverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business. IBM Db2: IBM's enterprise RDBMS for Linux, UNIX, Windows and z/OS, with BLU columnar and pureScale clustering.

key differences

  • Software AG Adabas is primarily a multivalue (Pick) database; IBM Db2 is relational.
  • Only IBM Db2 has joins, full-text search, vector search, geospatial, json.

choose adabas for

  • +Government tax and social-security systems
  • +Banking and insurance back ends on IBM Z
  • +Rehosting Adabas/Natural applications to Linux

best at · OLTP

choose ibm-db2 for

  • +Mainframe core banking and insurance policy systems
  • +SAP and other packaged apps on IBM infrastructure
  • +Operational data warehouses with BLU columnar tables
  • +Continuous-availability OLTP with pureScale

best at · OLTP, OLAP, Warehouse

Software AG AdabasInverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business.
IBM Db2IBM's enterprise RDBMS for Linux, UNIX, Windows and z/OS, with BLU columnar and pureScale clustering.
overview
Primary model
Multivalue (Pick)
Relational
Also supports
–
Columnar / OLAP, Document, Spatial, Vector, XML
Type
Database engine
Database engine
Status
Active
Active
Developer
Software AG (Adabas & Natural business, owned by Silver Lake)
IBM
First release
1971
1983
Latest version
8.6.1 (z/OS) (Oct 2025)
12.1.5 (LUW) (Jun 2026)
License
ProprietaryProprietary commercial license
ProprietaryProprietary commercial license
Free tier
—
✓
popularity
WhichDB Score
8.4
45.5
Rank
#325
#38
GitHub stars
–
–
Stack Overflow questions
7
12.9K
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Large (≤ 1 PB)
Horizontal scaling
Addon
Addon
Multi-region
Read replicas
Read replicas
ACID
Full
Full
Consistency
Strong
Strong
Schema
Flexible
Strict
Architecture
Client server, Shared storage, Primary replica
Client server, Primary replica, Shared storage, Distributed
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
✓
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
IBM Cloud, AWS
capabilities
Transactions
✓
✓
Joins
—
✓
Secondary indexes
✓
✓
Full-text search
—
✓
Vector search
—
✓
Geospatial
—
✓
JSON
—
✓
Change data capture
✓
✓
Triggers
—
✓
Stored procedures
—
✓
Materialized views
—
✓
TTL / expiry
—
—
Pub/Sub
—
—
Columnar storage
—
✓
In-memory
—
✓
Durable persistence
✓
✓
Compression
✓
✓
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
✓
Branching
—
—
Online schema changes
—
✓
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
Natural, Adabas direct call interface, SQL (via Adabas SQL Gateway)
SQL, SQL PL
Client languages
Natural, COBOL, Java, C, Assembly
Java, C, C#, Python, JavaScript, Go, PHP, Ruby
Best for
OLTP
OLTP, OLAP, Warehouse, HTAP
Add more to this comparisonNot sure either fits? Try smart match

Software AG Adabas vs IBM Db2: FAQ

What is the difference between Software AG Adabas and IBM Db2?

Software AG Adabas: Inverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business. IBM Db2: IBM's enterprise RDBMS for Linux, UNIX, Windows and z/OS, with BLU columnar and pureScale clustering. Software AG Adabas is primarily a multivalue (Pick) database; IBM Db2 is relational. Only IBM Db2 has joins, full-text search, vector search, geospatial, json.

When should I choose Software AG Adabas over IBM Db2?

Choose Software AG Adabas for government tax and social-security systems; banking and insurance back ends on IBM Z; and rehosting Adabas/Natural applications to Linux. Choose IBM Db2 for mainframe core banking and insurance policy systems; SAP and other packaged apps on IBM infrastructure; and operational data warehouses with BLU columnar tables.

Is Software AG Adabas or IBM Db2 more popular?

IBM Db2 ranks #38 on the WhichDB Score (45.5/100) and Software AG Adabas ranks #325 (8.4/100). Popularity is not fit: check the requirements that matter for your project.

Are Software AG Adabas and IBM Db2 open source?

No. Software AG Adabas is proprietary, closed-source software. No. IBM Db2 is proprietary, closed-source software.