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Apache Jena TDB vs Dydra

Apache Jena TDB: Apache Jena's native RDF store, embeddable in Java or served over SPARQL with Fuseki. Dydra: Hosted RDF triple store with SPARQL 1.1, valid-time indexing and an MCP endpoint on every repository.

key differences

  • Licensing: Apache Jena TDB is open source (permissive) (Apache License 2.0); Dydra is proprietary (Proprietary (hosted service)).
  • Horizontal scaling is none in Apache Jena TDB and native in Dydra.
  • Transactions: Apache Jena TDB offers full ACID; Dydra offers limited.
  • Only Apache Jena TDB has transactions, full-text search, geospatial, in-memory.
  • Only Dydra has joins, secondary indexes, role-based access, time travel.
  • Dydra has a serverless option; Apache Jena TDB does not.
  • Apache Jena TDB can run embedded in your application process.

choose apache-jena-tdb for

  • +Embedded RDF storage in Java applications
  • +SPARQL endpoints for research datasets
  • +Ontology and vocabulary management
  • +Testing and prototyping semantic-web apps

best at · Knowledge graph, Metadata, Embedded

choose dydra for

  • +Hosted linked-data and knowledge-graph backends
  • +Publishing RDF datasets with a public SPARQL endpoint
  • +Time-windowed queries over sensor or tick data modelled as RDF
  • +Giving LLM agents structured access to a knowledge graph

best at · Knowledge graph, Traversal, Time-series

overview
Primary model
RDF / Triple Store
RDF / Triple Store
Also supports
–
Graph
Type
Database engine
Managed service
Status
Active
Active
Developer
Apache Software Foundation
Datagraph GmbH
First release
2008
2010
Latest version
6.2.0 (Jul 2026)
–
License
Open source (permissive)Apache License 2.0
ProprietaryProprietary (hosted service)
Free tier
✓
✓
popularity
WhichDB Score
18.9
0.0
Rank
#175
#721
GitHub stars
1.5K
–
Stack Overflow questions
2.4K
–
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Medium (≤ 10 TB)
Horizontal scaling
None
Native
Multi-region
None
None
ACID
Full
Limited
Consistency
Strong
Strong
Schema
Schemaless
Schemaless
Architecture
Single node, Embedded, Client server
Serverless, Distributed
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
SPARQL
SPARQL 1.1, GraphQL, score
Client languages
Java
Ruby, Python, JavaScript, Java, Clojure, Common Lisp
Best for
Knowledge graph, Metadata, Embedded, Scientific
Knowledge graph, Traversal, Time-series

Apache Jena TDB vs Dydra: FAQ

What is the difference between Apache Jena TDB and Dydra?

Apache Jena TDB: Apache Jena's native RDF store, embeddable in Java or served over SPARQL with Fuseki. Dydra: Hosted RDF triple store with SPARQL 1.1, valid-time indexing and an MCP endpoint on every repository. Licensing: Apache Jena TDB is open source (permissive) (Apache License 2.0); Dydra is proprietary (Proprietary (hosted service)). Horizontal scaling is none in Apache Jena TDB and native in Dydra. Transactions: Apache Jena TDB offers full ACID; Dydra offers limited.

When should I choose Apache Jena TDB over Dydra?

Choose Apache Jena TDB for embedded RDF storage in Java applications; SPARQL endpoints for research datasets; and ontology and vocabulary management. Choose Dydra for hosted linked-data and knowledge-graph backends; publishing RDF datasets with a public SPARQL endpoint; and time-windowed queries over sensor or tick data modelled as RDF.

Is Apache Jena TDB or Dydra more popular?

Apache Jena TDB ranks #175 on the WhichDB Score (18.9/100) and Dydra ranks #721 (0.0/100). Popularity is not fit: check the requirements that matter for your project.

Are Apache Jena TDB and Dydra open source?

Yes. Apache Jena TDB is open source. License: Apache License 2.0. No. Dydra is proprietary, closed-source software.