A very common alternative to corrugated cardboard edge protectors are Solid Board Edge Protectors
they are designed to stabilize palletized product, preventing it from shifting on the pallet and, providing extra strength when multi stacking pallets. 
Square edges and corners are particularly vulnerable to damage, cardboard edge protectors are designed to reduce the risks of damage by protecting the edges of stacked or palletized product.

Looking for Strapping Guards or Strapping Protectors?
Plastic and Cardboard corner edge protectors are best known as strapping guards or strapping protectors, made from robust plastic with ribbed channels that prevent the strap from sliding, or smooth fiberboard, a more economic choice.
Plastic and cardboard corner edge piece protectors are used to allow maximum strapping tension without damaging the product, carton or pallet edges. They spread the strapping tension across a wider area for greater package security.

Foam edge protectors are available in ‘U’, ‘L’ and ‘O’ profiles.
Get maximum protection with light weight and non-abrasive foam profiles offering scratch and dent prevention. With high compression strength this resilient foam offers crushproof shock absorbency, and surface protection.
Self-gripping U and L profile foam corner pieces and edge protectors cushion the edges of delicate furniture, equipment and décor. While O profile is a tubing design and not only cushions and protects but is an excellent insulator.