Aleph

The software indexes large collections of documents—PDF, Word, HTML—and structured data such as CSV, XLS, and SQL tables, providing a unified interface for browsing and searching the content. It supports cross‑referencing of entities like people and companies against external watchlists or public datasets, which is especially useful for investigative reporting workflows. Users can import data, run full‑text searches, and explore relationships between items without needing separate tools for each file type.

It is self‑hostable, released under the MIT license, and offered without subscription or tiered pricing. The project is maintained by a community of organizations and individuals, with documentation covering installation, data ingestion, and usage. The stable releases are available on the main branch, while development work continues on a separate branch.

The codebase is open source and libre, allowing users to modify or extend the platform for their own investigative or research needs. Maintenance of this version will cease after December 2025, with the developers transitioning to a newer, supported platform.