No. 6 of 33 ·Knowledge Graph Software

QLever

Web · Windows · Mac · Linux · Self-hosted · API

Freedom report

Three barsScore 6.6

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

QLever is ranked #6 of 33 in knowledge graph software on Freedom251. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

QLever plans and pricing

All plans

QLever Free Open-source software · Apache 2.0 license github.com · 5 Oct 2026

Compared on knowledge graph software

Deployment options: self-hosted
SPARQL support: sparql 1.1
Federated queries: Yes
Supported RDF formats: Turtle (TTL), N-Triples (NT), N-Quads (NQ)

Best QLever alternatives

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Two bars RDFox Free tier No. 1Free6.7 Two bars AllegroGraph Free tier No. 2Free6.6 Two bars Eclipse RDF4J Free tier No. 3Free6.6 Two bars GraphDB Free tier No. 4Free6.6 Two bars Protégé Free tier No. 5Free6.6 Two bars RDF Studio Free tier No. 7Free6.6

The record

What it does: QLever is a graph database implementing RDF and SPARQL for loading and querying large datasets.
Scale: The project says QLever scales to more than a trillion triples on a single commodity machine.
Text search: QLever includes text search over knowledge bases.
Query assistance: QLever provides context-sensitive autocompletion for SPARQL queries and live query analysis.
Spatial features: QLever supports efficient spatial queries and interactive map visualization of large numbers of geometric objects.
Embedded use: QLever can run as an embedded database inside C++ code without a client-server setup.
Dataset examples: The project lists demos for Wikidata, Wikimedia Commons, OpenStreetMap, UniProt, PubChem, and DBLP.
Installation: Official packages are available for Debian, Ubuntu, Ubuntu-derived distributions, and macOS; Docker and Podman images are also available.
macOS limit: The official Homebrew package supports ARM64 Apple Silicon Macs; Intel Macs are not supported by that package.
Windows limit: The documentation says Windows use runs Docker inside a virtual machine and may incur significant performance and RAM costs; binary releases are in progress.
Integrations: The QLever UI exposes backend API URLs and offers query access via GET and POST examples using curl.
Support: For bugs or missing features, the project asks users to search existing GitHub issues or open an issue or discussion.
Security and compliance: The opened maker pages identify the Apache 2.0 license but do not state a security certification or compliance program.
Headquarters: Freiburg, Germany
Price from: Free

Where it ranks on Freedom251

Best Knowledge Graph Software in 2026#6 of 33
Best RDF Databases in 2026#5 of 26

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Sources

github.com/ad-freiburg/qlever· checked 5 Oct 2026
docs.qlever.dev/quickstart/· checked 5 Oct 2026
docs.qlever.dev/faq/· checked 5 Oct 2026
qlever.dev/wikidata· checked 5 Oct 2026
qlever.dev· checked 28 Sept 2026