IDA Pro vs OllyDbg

IDA Pro is a disassembler, decompiler and debugger for analyzing processors, file formats and software. It supports disassembly for more than 60 processor families, and its debugger works with multiple targets, including remote applications. The bundled gooMBA plug-in uses algebraic and program-synthesis techniques, heuristics and an SMT solver to simplify obfuscated binaries. Automation options include the IDA C++ SDK, IDAPython API, IDAT command-line functions and the idalib headless library. Teams can work with GitHub, GitLab, Bitbucket, Gitea or another Git remote, with Git LFS support for large IDB files. Private Lumina is a self-hosted add-on that restricts a knowledge base to authorized users; it exchanges function hashes and metadata rather than entire byte patterns. IDA Pro runs on Linux, macOS and Windows. The IDA Pro Essential plan costs $1,099 a year, with a one-year minimum commitment and no monthly payments. Hex-Rays states that there is no free trial and points users to IDA Free for checking basic capabilities.

OllyDbg is a free 32-bit assembler-level debugger for Microsoft Windows, intended for binary analysis when source code is unavailable. It traces registers and identifies procedures, loops, API calls, switches, tables, constants, and strings. The debugger can load DLLs, attach to running programs, and handle multithreaded applications. Breakpoint types include conditional, logging, memory, and hardware breakpoints; execution tracing can log arguments for known functions. Patches can be retained between sessions, written back to executable files, and used to update fixups. An open architecture supports third-party plugins, and the maker provides a Plugin Development Kit with documented samples. Listed requirements include Windows 95, 98, NT 4.0, 2000, or higher; Win32s is unsupported. Development is frozen, and the 64-bit version is incomplete. Registration is free and requested for permanent or commercial use. The maker says original versions 1.00–1.10 do not communicate with other computers except for remote files specified by the user.