Ahrefs
SEO research platform that crawls the web to show you what keywords competitors rank for, where their backlinks come from, and how to outrank them.
What are Ahrefs?
Ahrefs is an SEO research platform that crawls 6 billion web pages daily to give you competitive intelligence on keywords, backlinks, and content performance.
It runs the second most active web crawler after Google, which means it has one of the largest databases of backlinks and keyword data in the industry.
Most builders use it to spy on competitors (what keywords they rank for, where their traffic comes from), find content gaps in their niche, and track their own site's SEO health. The Site Explorer tool is particularly useful for reverse-engineering how top-ranking sites got there.
Plans start at $29/month for basic keyword research, scaling up to $1,499/month for agencies. There's also a free Webmaster Tools version if you just want to audit your own site.
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Related Terms
Google's free tool that shows how your site performs in search results and helps you fix technical SEO issues before they hurt traffic.
A specialized database that stores data as mathematical vectors (embeddings) to enable fast semantic search and AI-powered similarity matching.
Creating hundreds or thousands of landing pages automatically using templates and data to rank for related long-tail keywords.
The practice of crafting specific instructions to get better outputs from AI models like ChatGPT, Claude, or Gemini.
The automated process where search engine bots discover and scan web pages by following links across the internet.
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