I think most everyone will agree that as of today, the two big hitters in SEO tools are MOZ and Ahrefs.

Yes there are others platforms providing SEO tools, but these two are ones I use most.

As a website admin and website media broker, I must have the tools that provide accurate and reliable info on metrics that define SEO aspects in client campaigns, especially website marketing.

Domain authority and key word research are fundamental to establishing success in any marketing campaign.

Without knowing the key words you are using and for what purpose, who can you realistically target with your content?

To see your site grow and understand how the "Machines" perceive your efforts, you have to rely, as of today, on a score using characteristics such as domain authority.

Below I have provided a link to each platform, that is free as of today, in the intention you will begin to use it as a measuring tape. One some site there i a wide discrepancy in scores. I say that as a point of interest, not making judgements or evaluations about it.

Moz and Ahrefs are established SEO platforms, but they cater to different users in 2025. While my fav has been Moz, I am now in camp with Ahref for many reasons.

Moz Pro emphasizes beginner-friendly tools, on-page optimization, and educational resources, making it suitable for small teams or those new to SEO.

Domain Authority checker at Moz is here.

Ahrefs, meanwhile, prioritizes deep backlink analysis and keyword exploration with a focus on technical depth, appealing to advanced users and agencies. Based on recent reviews, Ahrefs generally edges out in user satisfaction and backlink data, while Moz offers more affordable entry points and broader content marketing features.

Domain Authority checker at Ahref is here.

Here's a side-by-side comparison across key categories, informed by expert analyses and official pricing as of September 2025.

Hope this info on tools is helpful!
If you need help with website design SEO, I will help you. Steu