Logseq

Logseq is a privacy-first, open-source knowledge management and organization tool designed to help users build a personal project database. It is developed as a decentralized, community-driven project with contributors from all over the world, though its technical foundation and initial development were spearheaded by developers in China. The software focuses on local-first data storage, meaning users retain full ownership of their files on their own machines.

Ownership of Logseq is held by Logseq Inc., a company founded to support the development and ecosystem around the open-source software. While the core software remains open-source under the GNU Affero General Public License, the corporate entity manages the infrastructure, premium services, and the long-term vision of the product. The platform has gained significant popularity among researchers, developers, and knowledge workers who prioritize data privacy and interconnected note-taking through bidirectional links.