PX4/PX4-Autopilot
PX4 Autopilot Software
A source-linked method for comparing flight-control repositories without inventing conclusions.
comparison Reviewed 8/7/2026
I need to compare open-source flight stacks but want the comparison to stay grounded in repository evidence.
Pick fields that exist in the official records: license, last activity, documentation entry points. Do not invent fields the sources do not provide.
For each stack, copy the value and the source URL into your comparison table.
Any field without a source stays Unknown. Never fill a gap with an assumption.
Use the repository activity, license field and official documentation links shown on each resource page.
PX4 Autopilot Software
ArduPlane, ArduCopter, ArduRover, ArduSub source
Open Source Flight Controller Firmware
Paparazzi is a free and open-source hardware and software project for unmanned (air) vehicles. This is the main software repository.