OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.
Cost / License
- Free
- Open Source
Platforms
- Linux
- BSD
- FreeBSD
Apps similar to mergerfs include OpenZFS, which is free and open source. Other options are btrfs, StableBit DrivePool, Greyhole and mhddfs. In total there are six File Managers like mergerfs for Linux and Windows.
OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.
Btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration.
State of the art, file based drive pooling software.



Greyhole is an application that uses Samba to create a storage pool of all your available hard drives (whatever their size, however they're connected), and allows you to create redundant copies of the files you store, in order to prevent data loss when part of your hardware...
Bcachefs is an advanced new filesystem for Linux, with an emphasis on reliability and robustness and the complete set of features one would expect from a modern filesystem.