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PX4 vs ArduPilot: Architecture & Trade-offs

Deep-dive technical comparison between PX4 and ArduPilot software stacks.

Evidence-Based Comparison Matrix

FeaturePX4 AutopilotArduPilot
ArchitectureMicroORB Pub/Sub ModularThreaded Monolithic
Primary LicenseBSD 3-ClauseGPL v3
VTOL SupportAdvanced Tilt-Rotor / TransitionExtensive QuadPlane Support
GCS IntegrationNative QGroundControlMission Planner & QGC

Architectural Differences

  • PX4: Uses microORB pub/sub middleware with modular architecture.
  • ArduPilot: Threaded monolithic design with extensive vehicle support.