During the spring I have asked a question about what brand do your paddle. I listed 14 different common kayak brand (including build your own kayak and different brand). The result is not scientific but 117 did answer. The number one answer was different brand (26%) followed by Valley (15%) and Rockpool (10%). I was surprised by that high number of different brand. Well, my Silhouette from Foster Rowe is included in that number. So I can imagine there is many different brands. Click here for the complete list of the kayak survey.
By the way, Valley have a quite new design of their website. Pretty good actually.
The Clapotis Kayak is proberly one of the kayak brand that is not included in the list. It is very popular here in Goteborg.