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Last pushed: 5 days ago
Short Description
Document and database search engine
Full Description

.. epigraph::

Truth cannot penetrate a closed mind. If all places in the universe are in
the Aleph, then all stars, all lamps, all sources of light are in it, too.

-- The Aleph <>_,
Jorge Luis Borges

.. figure::
:alt: Build Status

Aleph is a tool for indexing large amounts of both unstructured (PDF, Word,
HTML) and structured (CSV, XLS, SQL) data for easy browsing and search. It is
built with investigative reporting as a primary use case. Aleph allows
cross-referencing mentions of well-known entities (such as people and
companies) against watchlists, e.g. from prior research or public datasets.

Here's some key features:

  • Web-based UI for search across large document and data sets.
  • Watchlist editor for making custom sets of entities to be tracked.
  • Equal support for structured (i.e. tabular) and unstructured (i.e. textual)
  • Importers include a local filesystem traverser, web crawlers and a SQL query
  • Document entity tagger (regular expressions-based, and optionally using NLP).
  • Support for OCR, unpacking Zip/RAR/Tarballs, language and encoding detection.
  • Entity watchlist importers for OpenSanctions <>_.
  • OAuth authorization and access control on a per-source and per-watchlist
  • Excel export for search result sets.


The documentation for Aleph is available at <>_.
Feel free to edit the source files in the docs folder and send pull
requests for improvements.

To build the documentation, run make docs

You'll find the resulting HTML files in /build/docs/html.


Aleph is used by multiple organisations, including Code for Africa, OCCRP and
OpenOil. For coordination, the following mailing list exists:
aleph-search <!forum/aleph-search>_

If you find any errors or issues using Aleph please
file an issue on GitHub <>_ or
contact the mailing list.

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