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Software AG Adabas vs IBM IMS

Software AG Adabas: Inverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business. IBM IMS: IBM's 1960s hierarchical database and transaction manager, still running bank and airline cores on z/OS.

key differences

  • Software AG Adabas is primarily a multivalue (Pick) database; IBM IMS is hierarchical.
  • Only Software AG Adabas has change data capture.
  • Only IBM IMS has online schema changes.

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-ims for

  • +Core banking ledgers and payment processing
  • +Insurance policy administration
  • +Airline and travel reservation back ends
  • +Exposing legacy IMS transactions as APIs

best at · OLTP

Software AG AdabasInverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business.
IBM IMSIBM's 1960s hierarchical database and transaction manager, still running bank and airline cores on z/OS.
overview
Primary model
Multivalue (Pick)
Hierarchical
Also supports
–
–
Type
Database engine
Database engine
Status
Active
Active
Developer
Software AG (Adabas & Natural business, owned by Silver Lake)
IBM
First release
1971
1968
Latest version
8.6.1 (z/OS) (Oct 2025)
15.6 (Jun 13, 2025)
License
ProprietaryProprietary commercial license
ProprietaryProprietary commercial license
Free tier
—
—
popularity
WhichDB Score
8.4
7.7
Rank
#325
#338
GitHub stars
–
–
Stack Overflow questions
7
–
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
Shared storage, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
–
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)
DL/I, SQL (IMS Open Database)
Client languages
Natural, COBOL, Java, C, Assembly
COBOL, PL/I, Java, C, Assembly
Best for
OLTP
OLTP
Add more to this comparisonNot sure either fits? Try smart match

Software AG Adabas vs IBM IMS: FAQ

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

Software AG Adabas: Inverted-list, multi-value mainframe database paired with Natural, run as a standalone Software AG business. IBM IMS: IBM's 1960s hierarchical database and transaction manager, still running bank and airline cores on z/OS. Software AG Adabas is primarily a multivalue (Pick) database; IBM IMS is hierarchical. Only Software AG Adabas has change data capture. Only IBM IMS has online schema changes.

When should I choose Software AG Adabas over IBM IMS?

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 IMS for core banking ledgers and payment processing; insurance policy administration; and airline and travel reservation back ends.

Is Software AG Adabas or IBM IMS more popular?

Software AG Adabas ranks #325 on the WhichDB Score (8.4/100) and IBM IMS ranks #338 (7.7/100). Popularity is not fit: check the requirements that matter for your project.

Are Software AG Adabas and IBM IMS open source?

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