Cressi is an Italian based company that has been producing scuba diving equipment since the late 1930s. Cressi is the oldest scuba manufacturer in the world, and with that experience comes quality. Cressi as a company has four subsections. They have equipment for Scuba Diving, Spear Fishing, Snorkeling, and Swimming. When it comes to diving, Cressi has anything you might need. For BCDs for example, they have a wide range of options depending on what you are looking for as a diver. Their Cressi Carbon BCD is one of the most highly rated BCD's available and at a reasonable price. BCDs are not the only thing that the Italian company has; they can cover you from head to toe for any of your diving needs. This, along with their 90 years of experience making gear put Cressi at the number one spot on this list.
Maybe more of a household name, Aqua Lung has also been around for quite a few years, making high quality scuba diving equipment. Aqua Lung was founded in 1943 and is a French company. Aqua Lung also has great variety in their scuba diving equipment. Their inventory includes dive computers, wetsuits, masks and regulators. Their most popular item, however, might be their fins which are very highly rated, especially the Stratos ADJ model. Aqua Lung also has very popular accessories, including their Big Squeeze titanium dive knife. When it comes purely to name, Aqua Lung is a company that most casual and advanced divers will know; they have earned themselves a high position on this list.
If you're looking for a slightly more high end scuba diving brand, with specialized equipment that will fit you perfectly, Scuba Pro is the brand for you. Scuba Pro exclusively sells scuba diving equipment, from regulators to BCDs as well as dive computers and all kinds of diving accessories. Specialization is where Scuba Pro makes its mark. For example, their Bella BCD, which is designed to fit female bodied divers, is the highest rated BCD of its kind, perfectly snug and very easy to use for any experienced female bodied diver. Scuba Pro's dry suits and dive computers are also very highly rated, both things that advanced divers will have in their equipment bags. If you're a beginner, Scuba Pro may be a little too specialized. For advanced divers looking for high quality equipment to purchase, Scuba Pro is the company for them.
A little bit contrasting to Scuba Pro, AERIS is a company whose mission is to ensure that any scuba diver, regardless of skill level, can have access to high quality equipment without having to pay too much for it. This United States based company has been using that mission since 1998, producing high quality gear and selling it across the world. AERIS's dive computer is one of the most highly rated in the world, and is designed for anyone to be able to use, at least once you have basic dive computer training. AERIS also sells parts to replace any broken equipment you may have, saving you from having to buy something entirely new. Their accessibility as well as the high quality equipment they produce earn AERIS a spot on this top five list.
The second Italian brand on this list, Mares is another highly rated company for scuba diving equipment. Mares branches into all water sports, covering snorkeling, free diving, and spearfishing, as well as scuba diving. Mares makes high tech and high quality equipment. Their dive knife, for example, blew the competition out of the water for its quality and durability. The "Majellan BCD" is another example of innovation by Mares. Their BCD is designed to fold up small so that you can travel with it to any diving destination that you wish. Innovation like this has kept Mares at the forefront of scuba diving technology, earning it the final spot on this list.