Ahrefs
SEO research built on its own web crawler
Ahrefs runs its own crawler rather than licensing someone else's index, and uses it for backlink analysis, keyword research, rank tracking and site audits. Live since 2010.
Pricing and platforms
- Paid from
- $29 per month vendor's pricing page,
- Has a free tier
- Ahrefs Free: limited access to Site Explorer and Site Audit for a site you verify you own.
- Runs on
- Web, API, Browser extension
Facts from the vendor's own pages, checked August 19, 2026. Source
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