Private extension system has been at the centre of a debate triggered by inefficient public agricultural extension. The debate is anchored on the premise that the private sector is more efficient in extension service delivery. This study evaluates the private extension system in Kenya. It employs qualitative and quantitative methods. The results indicate that the private extension is skewed towards high potential regions because it is either driven by profits or quick results. The private system benefits from the public extension staff, thus some form of commercial contracting of public staff to serve the private systems is appropriate. Public extension should not overlap in the areas efficiently served by the private system. The government should consider contracting the private sector to deliver extension to neglected areas. The government has a role in extension services funding, quality control, arbitration, monitoring and in provision of quality infrastructure to lower private sector players' costs. (Contains 5 tables and 1 figure.)