RDFox vs Tentris
RDFox
oxfordsemantic.techTentris
tentris.ioSide by side
| Figure | RDFox | Tentris |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · RDF Databases | 8.5 (#3) | 7.5 (#19) |
| Company | Oxford Semantic Technologies is an Oxford University spin-out acquired by Samsung Electronics in 2024. | Tentris says the database grew from more than a decade of research at Paderborn University and lists Germany as where it builds the product. |
| Headquarters | Oxford, United Kingdom | Tentris GmbH lists its address as Obernstraße 50, 33602 Bielefeld, Germany. |
| Product | RDFox is a main-memory, scalable centralized data store for RDF graph data queried with SPARQL 1.1. | Tentris stores and queries RDF knowledge graphs and supports SPARQL 1.1. |
| Support | Oxford Semantic Technologies says it aims to reply to contact messages within two working days and provides an RDFox Community Slack channel. | The Community plan includes community support; the EULA states Tentris provides no support or maintenance for the non-commercial software. |
Plans
RDFox
- Free evaluationFree
- RDFox free evaluation licenseFree
- AWS Marketplace RDFoxPriced on request
- RDFox commercial licensePriced on request
In their own words
RDFox
RDFox is a main-memory data store for centralized RDF graphs, queried with SPARQL 1.1. It represents rules and ontological axioms with Datalog, OWL 2 and SWRL, and updates rule consequences as data changes; it can process 2–3 million new-fact inferences per second. Its supported knowledge-graph technologies include RDF, SPARQL 1.1, Datalog, SWRL, OWL 2 RL and SHACL. Java applications can connect through a native API, or RDFox can run as a standalone server through a REST API. Import and export formats include CSV, JSON, N-Triples, Turtle, TriG and OWL 2 Functional-Style Syntax. It can replicate knowledge and data changes across servers to maintain service during an outage, and deployments are described for cloud, on-premises, on-device and edge use. RDFox runs on Linux, macOS and Windows. Security features include encryption at rest, mutual-TLS client-certificate authentication and OpenID Connect single sign-on. Pricing is on request; the free 30-day evaluation license is restricted to evaluation and non-commercial use.
Tentris
Tentris stores and queries RDF knowledge graphs using SPARQL 1.1. It keeps RDF graphs in a single compressed Hypertrie index designed to reduce memory use. For query execution, it combines adaptive planning with worst-case optimal joins, streams results, and avoids materializing intermediate results. Tentris describes its support as RDF 1.1 and SPARQL 1.1 compliant, so existing RDF data models do not need to change when switching. It is also positioned as a knowledge layer for GraphRAG, AI agents, and semantic applications requiring deterministic retrieval across connected knowledge. The Community plan is free and includes a single-core license, in-memory storage, transactions, and community support. The non-commercial license excludes production and revenue-generating use. Commercial is billed Annual, licensed per CPU core starting at 12 cores, and includes a 60-day trial license; no price is listed. Cloud is marked coming soon for Azure, AWS, and Google Cloud. Install options include Linux, macOS, Docker, and Python, with x86-64 and ARM AARCH64 listed.