Tools, data, and strategies

Top-18 Guest Posting Marketplaces. 2026 Worldwide Rating.

We analyzed 121 guest posting platforms and ranked the top 18, with detailed scoring on inventory, pricing, and transparency.

Feb 18, 2026

We Paid $275 to Black Hat SEOs to Manipulate Domain “Authority” Metrics. Tested Ahrefs DR, Moz DA, Semrush AS, and Majestic TF Reliability.

We ran seven experiments on 12,000+ domains to test how easily domain authority metrics from major SEO tools can be gamed.

Feb 16, 2025

Research. Top US Marketplaces for Buying or Selling an Online Business in 2024.

Traffic-based ranking of US online business marketplaces, from Flippa to Empire Flippers, with data on market share.

Aug 26, 2024