The top ranked brand of surveillance cameras is currently Hikvision. Hikvision is a global leader in the security industry, known for their high-quality cameras, advanced technology, and comprehensive range of products. They offer a wide variety of surveillance cameras, including HD cameras, PTZ cameras, thermal cameras, and more, all designed to provide top-notch security solutions for businesses and homes. Hikvision's reputation for reliability, innovation, and performance has solidified their position as the leading brand in surveillance camera technology.