Welcome to PISA

Performant Indexes and Search for Academia


PISA is a text search engine able to run on large-scale collections of documents. It allows researchers to experiment with state-of-the-art techniques, allowing an ideal environment for rapid development.

Some features of PISA are listed below:

  • Written in C++ for performance;
  • Indexing & Parsing & Sharding capabilities;
  • Many index compression methods implemented;
  • Many query processing algorithms implemented;
  • Implementation of document reordering;
  • Free and open-source with permissive license;


PISA is still in its initial release and many new features are going to come in the next versions. Contributions are also welcome!