Apache Jena Fuseki vs QLever
Apache Jena Fuseki
jena.apache.orgQLever
qlever.devSide by side
| Figure | Apache Jena Fuseki | QLever |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 1 |
| Spec score · RDF Databases | 9.1 (#1) | 7.9 (#12) |
| Spec score · Knowledge Graph Software | 9.1 (#2) | 7.9 (#17) |
| Embedded use | An embedded Fuseki server lets a Java application provide SPARQL services while continuing to access and update its datasets. | QLever can run as an embedded database inside C++ code without a client-server setup. |
| Support | The project welcomes feature suggestions, bug reports, patches, and documentation contributions. | For bugs or missing features, the project asks users to search existing GitHub issues or open an issue or discussion. |
| What it does | Fuseki is an Apache Jena SPARQL server that can run standalone or inside another application. | QLever is a graph database implementing RDF and SPARQL for loading and querying large datasets. |
Plans
In their own words
Apache Jena Fuseki
Apache Jena Fuseki is a SPARQL server that can run independently or as part of an application. It provides SPARQL 1.1 query and update protocols and the SPARQL Graph Store protocol. Fuseki integrates with TDB for transactional persistent storage and includes Jena text query. It can run as a standalone server, an operating-system service, an embedded component, or a web application in Apache Tomcat or Jetty. The project offers a plain server without a UI, and distributions include a ZIP with server and UI, Maven artifacts, and a WAR file. A project kit can build Docker or Docker Compose containers; databases need mounted volumes to survive container removal. The web application uses Apache Shiro, with access control at server, dataset, endpoint, and graph levels. Graph-level controls currently apply only to read-only datasets. By default, administrative functions are limited to localhost, while SPARQL endpoints are open. Fuseki is free, self-hosted software under Apache License 2.0.
QLever
QLever is an open-source graph database for loading and querying large RDF datasets. It implements SPARQL 1.1, including federated queries, named graphs, the Graph Store HTTP Protocol, and updates. The project says it can handle more than a trillion triples on a single commodity machine. It also provides text search over knowledge bases, context-sensitive SPARQL autocompletion, live query analysis, and spatial queries with interactive maps of large sets of geometric objects. QLever can run embedded inside C++ code without a client-server setup. Example datasets include Wikidata, Wikimedia Commons, OpenStreetMap, UniProt, PubChem, and DBLP. It is self-hosted, with official packages for Debian, Ubuntu, Ubuntu-derived distributions, and macOS, plus Docker and Podman images. The official Homebrew package supports ARM64 Apple Silicon Macs, not Intel Macs. Windows use runs Docker inside a virtual machine and may incur significant performance and RAM costs; binary releases are in progress. QLever is free under the Apache 2.0 license.