Perplexity integrates the open-source reverse engineering tool REA (Reverse Engineer Anything) into Computer. Users only need to describe the software they want to replicate, and the AI can analyze how it works without the original source code, then attempt to rewrite a version with similar functionality. The 5 showcased replicated works include Figma, LibreOffice Calc, Photopea, Harvey, and Audacity, all providing online experience versions. REA is open-sourced by developer morluto and can be used with Ghidra and Hopper to analyze internal functions and call relationships of programs. It can also inspect web pages, JavaScript, and Electron applications; the author emphasizes that it cannot guarantee restoration of the original source code. Before October 31, using the /reverse-engineer task can get each person up to 10,000 Credits free quota.