DemandSphere - DemandSphere is an advanced-level software that helps marketers to create the best digital appearances of their brands.

SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

DataForSEO - DataForSEO offers API data for SEO companies that deliver results of tasks for Rank tracking, SERP, Keyword data and On-page APIs.

Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.

Searchmetrics Suite - SEO Software

Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.