DokuWiki is a wiki engine written in PHP that stores pages as plain text files. It therefore needs only a web server and PHP, and no database. Organisations and teams use it mainly to build documentation and keep internal knowledge. It is server software that you install yourself; stable releases carry a date as their version, such as 2026-07-14c.
DokuWiki was started in 2004 by a developer in Germany, who still leads the project together with the DokuWiki community. Copyright is held by that developer and the community; the project pages name no company or foundation as owner. The licence is GPL-2.0. Because you run the software on your own web server, pages and attachments stay under your control and no vendor cloud is required. DokuWiki is listed in the SILL, the French government's list of recommended free software.