AFL++

Stream Processing Software

Free planAndroidLinuxmacOSSelf-hostedWindows

7.2#14 of 21€1666.67/mofirst paid tier

Overview

AFL++ is ranked #14 of 21 in stream processing software on Specifiction, made by AFL++. It runs on Android, Linux, macOS, Self-hosted, Windows. There is a free plan. Paid plans start at €1666.67/mo.

AFL++ plans and pricing

All plans

AGPL-3.0-or-later Free Use, study, modify, and distribute under AGPL terms · modified network services must offer corresponding source github.com · 28 Sept 2026

Commercial license €20,000/yr Donation to EFF or CCC; license lasts one year and can be renewed by donating again For organizations that cannot or do not want to comply with AGPL · proof of donation must be emailed github.com · 28 Sept 2026

Compared on stream processing software

Free plan: Yesgithub.com
Input generation methods: mutationgithub.com
Target types: source-code targets, binary-only targets, file inputs, stdin inputs, Android native libraries, Win32 PE binariesgithub.com
Coverage guidance: Yesgithub.com
Crash triage: Yesgithub.com
Execution mode: localgithub.com
Supported languages: C, C++, Python, Rustgithub.com
CI/CD support: Yesgithub.com

Facts

Free plan: Yesgithub.com · 20 Sept 2026
Purpose: AFL++ is a coverage-guided fuzzer that mutates input and checks whether it reaches a new path in the target binary.github.com · 28 Sept 2026
Compiler instrumentation: Its central afl-cc compiler supports LTO, LLVM, and GCC_PLUGIN instrumentation modes.github.com · 28 Sept 2026
Mutation and coverage: The project lists collision-free coverage, AFLfast++ power schedules, MOpt mutators, laf-intel, and redqueen among its features.github.com · 28 Sept 2026
Target types: The documentation covers fuzzing source-available programs, binary-only targets, network services, and GUI programs.github.com · 28 Sept 2026
Build modes: Build targets include source-only fuzzing, binary-only fuzzing, or a distribution build with both.github.com · 28 Sept 2026
Container image: The project provides a Docker image for x86_64 and arm64, with the target source mounted at /src in its example command.github.com · 28 Sept 2026
Linux requirements: The installation guide recommends LLVM 18 or newer and gives LLVM 14 as the minimum.github.com · 28 Sept 2026
macOS support: The guide documents building on macOS x86_64 and arm64, but says afl-clang-lto, afl-gcc-fast, and qemu_mode do not work there.github.com · 28 Sept 2026
License obligations: The combined afl-fuzz program is AGPL as a whole, and modified versions offered as network services must offer users the corresponding source.github.com · 28 Sept 2026
License exceptions: Individual source files marked Apache-2.0 may be reused under that license, while bundled third-party components retain their own licenses.github.com · 28 Sept 2026
Hardware and storage limits: The project warns that fuzzing can strain hardware, consume large amounts of memory or disk, and generate heavy filesystem I/O.github.com · 28 Sept 2026
Support: The maintainers direct users to GitHub issues for AFL++ defects, the FAQ and best practices, and the Fuzzing Zulip server.github.com · 28 Sept 2026
Release channels: The stable branch is described as the stability-focused default, while dev is bleeding edge and may fail to compile or contain bugs.github.com · 28 Sept 2026