Paraffin is a byproduct of petroleum refining. It is the cheapest wax to produce and gives the strongest scent throw, but it burns with more soot than natural waxes, which is the main practical downside rather than any dramatic safety risk when used properly. Soy wax is plant-based, burns cleaner than paraffin, and is widely available at a reasonable price, though some buyers find its scent throw noticeably weaker than paraffin at the same fragrance load. Beeswax sits at the top of the price range, burns the cleanest of the three, and carries a naturally faint honey scent, but it has a higher melting point, which can make it trickier for makers to blend with strong fragrance oils. There is no single "best" answer here — paraffin wins on scent throw and price, soy is the reasonable everyday middle ground, and beeswax wins on clean-burning and simplicity if you are happy to pay more for it.