WhatsApp was acquired by Facebook on February 19, 2014, and they are both owned by Mark Zuckerberg.
The founder of WhatsApp is Brian Acton, and the co-founder is Jan Koum. Facebook bought WhatsApp for about $19 billion in the year 2014. Meanwhile, the social media website of Facebook was launched by Mark Zuckerberg in February 2004, which grew into a franchise ever since and is headquartered at Menlo Park, California. Even to date, Zuckerberg remains the owner of Facebook and has not sold the company to anyone.