Let’s talk about the biggest SEO crawlers in the space and do a quick comparison.
Ahrefs
- The largest crawler, meaning the most accurate
- Minimal bugs
- Has been the best for a while
- DR (domain rank) is hard to fake
- Expensive
SEMRush
- Been around for a while
- Used to be mainly for paid analysis and not SEO
- Recently got much better with SEO
- Cheaper than Ahrefs and so it wins some attentions
- Unique audit features when compared to Ahrefs
Moz
- The smallest crawler
- The most inaccurate
- Free and so it wins attention from SEO workers in 3rd countries
- Metrics regularly inaccurate
- Domain authority (DA) is easy to spam/fake and so it means nothing
- Should never be used
Majestic
- The best topical analysis of all tools
- Cheaper than Ahrefs but also not free
- Trust flow (TF) is probably the hardest metric to manipulate/fake
- Citation flow (CF) is similar to Moz’s DA where it can just be spammed
- The most unpopular on the list
