Infrastructure / Storage & Retrieval

DiskANN

DiskANN is a Microsoft Research vector indexing library built around the Vamana graph algorithm, with disk-resident and in-memory index variants for large-scale approximate nearest neighbour search. It ships as a composable library exposing build and query APIs rather than a standalone server.

No PyPI artifact is declared on purpose. The repository has moved to a Rust-based composable DiskANN3 architecture (a `DataProvider` trait implemented per host system); the diskannpy PyPI package (0.7.0, no project URL in its metadata) binds the legacy C++ implementation on the `cpp_main` branch, which the repository itself states is no longer actively developed. Its downloads measure the frozen artifact, not the product being scored, and declaring it would make that count the product's adoption on the next warehouse refresh, so it stays undeclared and adoption reads from stars. Verified 2026-09-02 via the GitHub API and the LICENSE body.

Openness

5 high confidence

5.0

license: MIT(OSI)
source: public
core-gated: ungated

MIT license body confirmed. The repository is public and unarchived and builds the whole library, and the README describes no paid tier, enterprise edition or license-gated build beside it.

https://github.com/microsoft/DiskANN/blob/main/LICENSE.txt recorded 2026-09-02
LICENSE.txt is the verbatim MIT text under a Microsoft Corporation copyright line.
https://api.github.com/repos/microsoft/DiskANN recorded 2026-09-02
Repo metadata - license spdx_id MIT, private false, archived false, default branch main - for microsoft/DiskANN.
https://github.com/microsoft/DiskANN/blob/main/README.md recorded 2026-09-02
README describes a composable vector indexing library with no paid tier, enterprise edition or license-key-gated build beside the MIT-licensed code.

Adoption

2 low confidence

2.0

1,915 GitHub stars, which lands in the 1K-10K stars band of the stars scale, level 2. No package artifact is declared - the PyPI diskannpy package binds the legacy C++ implementation the repository itself says is no longer actively developed, so its downloads would measure the frozen artifact rather than the current DiskANN3 library, and it is left undeclared rather than declared and ignored (see the product comments). The stars scale applies with its cap of 3.

https://api.github.com/repos/microsoft/DiskANN recorded 2026-09-02
Repo metadata - stargazers_count = 1,915 - for microsoft/DiskANN.

Capability

2 medium confidence

2.0

Banded on the category feature matrix as single index family as a library, level with hnswlib - a single algorithm family shipped as a composable library rather than a store, index server, or a broader index-family toolkit like faiss.

https://github.com/microsoft/DiskANN/blob/main/README.md recorded 2026-09-02
README documents a single-index-family composable library (the Vamana graph) exposing a DataProvider trait for callers to implement storage against, with the legacy standalone C++ tool no longer actively developed.

Verified 2026-09-02