The company known as Guy Couach was founded by Albert Couach in 1897 as a ship engine manufacturing plant located in the Arcachon Bay on France's Atlantic coast, near Bordeaux. However, it wasn't until 50 years later, under the management of Albert's grandson, Guy Couach, that the company expanded into the luxury leisure boat market. This shift led to the launch of the first weekend yacht series, Arcoa, and the construction of a new shipyard in Gujan-Mestras, near Arcachon, to meet the growing demand.

In the early 1970s, Guy Couach began using Kevlar composite as the primary material for yacht hulls, marking a significant innovation in yacht construction.

In 2005, to expand its production capacity, the company acquired IMS Shipyard and rebranded itself as Couach Yachts. However, six years later, following its acquisition by the Nepteam holding company, the business was relaunched under the new brand name Chantier Naval Couach. This relaunch was marked by the launch of the 50-meter motor yacht Couach 5000 Fly.

Chantier Naval Couach currently offers clients a selection of models across two series:

• Discover – Motor yachts with a flybridge, including the 2300 Fly, 2600 Fly, and 3700 Fly models, ranging from 23 to 37 meters in length.
• Green Power – Motor yachts with hybrid propulsion systems, featuring the 4200 LOUNGE and 5200 YACHT models, ranging from 42 to 52 meters.

The largest yachts built by the shipyard are the 50-meter M/Y LA PELLEGRINA and M/Y BELONGERS, both based on the three-deck Couach 5000 Fly model. In 2017, the shipyard launched a more compact version of this model, the Couach 4400 Fast Fly (M/Y TOSCA).

Among the most successful models are the Couach 3500 Fly and 3700 Fly, with notable yachts such as M/Y WATER TOY III and M/Y HAKUNA MATATA.