Binary Ninja is a reverse-engineering platform developed by Vector 35 Inc. It allows users to disassemble a binary file and visualize the disassembly in both linear and graph-based views. The software performs automated, in-depth code analysis, generating information that helps to analyze a binary. It lifts assembly instructions into intermediate languages, generating decompiled code.

Binary Ninja supports various CPU architectures and binary executable formats, and runs on Windows, macOS, and Linux. It also offers a free-to-use cloud version and a native commercial version.

Originally developed as an internal tool for a CTF team, the developers later formed Vector 35 Inc. to turn Binary Ninja into a commercial product. Development began in 2015, and the first public version was released in July 2016.

The commercial version was developed from scratch and does not share code with the original internal tool. The latter one is now open-sourced under the GPLv2 license.

Binary Ninja's user interface is built using Qt and comprises several components such as a symbol list, a cross-reference window, and disassembly views (both linear and graph-based), a mini-graph, and a feature map. It also includes tools like a hex editor, strings listing, and a triage view.

Binary Ninja generates extensive annotations in the UI to assist binary analysis and also supports user-defined themes for customization.

Binary Ninja offers an API that can be accessed via Python, C++, or Rust. The API is open-sourced under the MIT License. It can interact with most of Binary Ninja's functionality, including the user interface, analysis tools, and intermediate languages (see below). It can be used to add support for new architectures or to automate tasks,

Plugins can be developed using the API to enhance Binary Ninja. Vector35 maintains a collection of official plugins, while the community has created numerous additional plugins.