Best for backward compatibility
eufy Security HomeBase S380 (HomeBase 3)
4.5 feature score
Highest scored product for this feature based on supporting review evidence.
Best Home Security Systems for backward compatibility
backward compatibility Decision Dashboard
Backward compatibility is a recurring strength, though upgrade support depends on model and sometimes timing.
Pros: signal penetration through walls, local processing capability
Cons: HomeKit compatibility, third-party accessory support