French cider makers Ets Guillet Freres SA - Cidrerie Kerisac (Agrial) are master blenders and Kerisac Breton Cider.
The Kerisac cider house, located in the Isac valley in Guenrouët, was founded by Edmond GUILLET in 1920. The company now belongs to the AGRIAL cooperative, the commercial management is still overseen by Laurent GUILLET, the grandson of the founder. The company therefore remains family oriented and in step with the times.