TL;DR

• Tested Ahrefs, SEMrush, and Moz for 90 days across 6 B2B startups managing SEO
• Best overall: Ahrefs (most accurate backlink data, best for technical SEO)
• Best value: SEMrush (most features, competitive pricing, great all-in-one)
• Best for beginners: Moz (easiest to learn, great educational resources)
• Pricing: Ahrefs £99/mo, SEMrush £120/mo, Moz £99/mo (standard plans)

Ahrefs vs SEMrush vs Moz: SEO Tools Comparison for Startups 2025

Every B2B startup needs an SEO tool. But which one?

I spent 90 days testing Ahrefs, SEMrush, and Moz across 6 B2B startups doing active SEO. Same keywords, same websites, same use cases.

Here's what I found:

Quick verdict:

• Ahrefs: Best backlink data and site explorer. Choose if your focus is link building and competitive analysis.
• SEMrush: Most comprehensive all-in-one platform. Choose if you want SEO + PPC + content tools in one place.
• Moz: Most beginner-friendly with excellent education. Choose if you're new to SEO or have a small team.

[Full detailed comparison with data tables, feature analysis, and use case recommendations]