Recently, a group of European developers hard-forked OnlyOffice with a focus on maintaining it themselves. Other people are joining the initiative and they listed reasons behind it (I am copying and pasting them here):
Contributing is impossible or greatly discouraged. ONLYOFFICE typically does not review or accept pull requests. Build instructions are unreliable, outdated or just plain broken.
The company regularly makes controversial decisions like closing off features in the mobile apps like mobile editing, and the removal of an administrator panel.
Lacking transparency. Commit messages, when visible, often just refer to an issue number in an internal issue tracker. There are quite a number of binary blobs and compiled or obfuscated code blobs. Most internal code comments are Russian which makes is hard to work with.
The mobile apps are not really open source but just wrappers. Example. The apps have extensive proprietary sections which will need to be re-implemented. Work on this is underway.
ONLYOFFICE is a Russian company (despite many attempts to hide this), and nearly all developers reside in Russia. Open Source is a global effort, but current political situation makes collaboration hard and trust difficult to earn. Especially when development is not transparent and open. A lot of users and customers require software that is not potentially influenced or controlled by the Russian government.
The Document Foundation already replied to the initiative (https://blog.documentfoundation.org/blog/2026/04/01/euro-office/) recognizing the initiative as credible but asking some questions regarding to the format support.
