<Tr> <Th> Alexa rank </Th> <Td> 69 (As of December 2017) </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.whatsapp.com </Td> </Tr> <Table> WhatsApp Inc . <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Type of business </Th> <Td> Subsidiary </Td> </Tr> <Tr> <Th> Founded </Th> <Td> February 24, 2009; 9 years ago (2009 - 02 - 24) </Td> </Tr> <Tr> <Th> Headquarters </Th> <Td> Mountain View, California, United States </Td> </Tr> <Tr> <Th> Founder (s) </Th> <Td> <Ul> <Li> Jan Koum </Li> <Li> Brian Acton </Li> </Ul> </Td> </Tr> <Tr> <Th> CEO </Th> <Td> Jan Koum </Td> </Tr> <Tr> <Th> Employees </Th> <Td> 50 </Td> </Tr> <Tr> <Th> Parent </Th> <Td> Facebook </Td> </Tr> <Tr> <Th> Website </Th> <Td> whatsapp.com </Td> </Tr> </Table> <Tr> <Th> Type of business </Th> <Td> Subsidiary </Td> </Tr>

Who is the founder of whatsapp and when
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