Ahrefs is an SEO tool suite headquartered in Singapore, founded in 2010, with a backlink index of 42 billion+ web pages and a 10 billion+ keyword database, widely used by SEO professionals worldwide.
WebCEO is a comprehensive SEO tool platform with over 20 years in the industry, offering keyword research, rank tracking, website audits, competitor analysis, and white-label reporting for small businesses and SEO agencies.
Internet Marketing Ninja is a US SEO tools and services provider offering 5 core modules - keyword research, rank tracking, site audits, link analysis, and competitor research - combined with human link-building and content strategy services for SEO teams and SMBs.