How semrush, ahref etc get the data

I am curious about how websites gather analytics data, especially for competitor websites. Does anyone have any ideas or suggestions? I am considering creating a tools website.

These tools likely use a combination of methods to gather data, including:

  • Crawling: Similar to how search engines work, these tools crawl the web, visiting websites and collecting information like page titles, keywords, backlinks, and content.
  • API Access: Some websites provide public APIs (Application Programming Interfaces) that allow access to their data, which these tools can utilize to gather information.
  • Public Data Sources: There are various publicly available sources of data, such as WHOIS records, social media mentions, and web archives, which can be used to supplement the information gathered through crawling and APIs.
  • Proprietary Techniques: It’s possible that these tools use their own proprietary algorithms and techniques to extract and analyze data, which they may not disclose publicly.

It’s important to note that accessing and using data from competitor websites should be done ethically and legally. Always respect website terms of service and privacy policies.