QLever

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Very fast SPARQL Engine, which can handle very large knowledge graphs, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search.

Cost / License

Free
Open Source (Apache-2.0)

Origin

Germany
EU

Platforms

Mac
Linux

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Features

Ad-free
Query Engine

QLever information

Developed by
University of Freiburg
Licensing
Open Source (Apache-2.0) and Free product.
Written in
C++
Alternatives
7 alternatives listed
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Supported Languages
- English

GitHub repository

919 Stars
145 Forks
454 Open Issues
Updated Oct 14, 2026

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QLever was added to AlternativeTo by giodi on Nov 8, 2024 and this page was last updated Nov 17, 2024.

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What is QLever?

QLever (pronounced "Clever") is a SPARQL engine that can efficiently index and query very large knowledge graphs with over 100 billion triples on a single standard PC or server. In particular, QLever is fast for queries that involve large intermediate or final results, which are notoriously hard for engines like Blazegraph or Virtuoso. QLever also supports search in text associated with the knowledge base, as well as SPARQL autocompletion.

QLever

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