The latest release of rizinorg/rizin is v0.9.1. It is a reverse engineering framework and a collection of command-line tools that runs on UNIX-like operating systems. Reverse engineering means taking a finished binary apart and retracing how it works internally. rizin packs binary analysis, code disassembly, program debugging, and forensic work into a single set of command-line tools. The README says the project focuses on usability, functionality, and cleanliness.
The project began as a fork of radare2, and the README states that it is portable. It provides standalone tools and libraries for machine code, file, and memory analysis, and it also includes a scriptable command-line hex editor that can open disk files. A hex editor is a tool for inspecting and modifying a file byte by byte. The main language is C and the license is LGPL-3.0. It has 4017 GitHub stars, and the repository was created on 2020-09-30.
The collected information, however, contains no change log for v0.9.1, so there is no way to know what this release actually fixed. No performance figures or benchmarks are given either. In the rating on a 10-point scale, the momentum item stops at 3.0 while the novelty, technology, and quality items are empty. What it covers is limited to binaries and machine code, and the LGPL-3.0 license terms have to be checked separately. Until the release notes and license terms are confirmed directly, there is no confirmed reason to extend an existing radare2 environment to rizin.