Most of this code is released under the Apache License Version 2.0 http://www.apache.org/licenses/.

The LSHKIT, which is embedded in our library, is distributed under the GNU General Public License, see http://www.gnu.org/licenses/.

The k-NN graph construction algorithm NN-Descent due to Dong et al. 2011 (see the links below), which is also embedded in our library, seems to be covered by a free-to-use license, similar to Apache 2.

FALCONN library's licence is MIT.

