Find the right workflow

The Best Backlink Analysis Tools

Everything here comes down to the crawler behind it. Index size and refresh rate decide whether you see a link this week or next month — features are secondary.

What you are really deciding: Whose index actually finds the links pointing at my site and my competitors'?

EEditor’s experienceDDocumentationPPricing checked
Short answer

Whose index actually finds the links pointing at my site and my competitors'?

Ahrefs is the strongest choice for link-led work — outreach, digital PR and competitive link analysis — because its own crawler and link index are the core of the product. Semrush is the better buy if you also need link gap analysis inside a suite with PPC and research tools, accepting a link index our review calls respectable but not the largest. Moz Pro fits teams that report on Domain Authority, but its link index is materially smaller.

Criterion 01

Index depth

The main difference between these tools. Ahrefs is built around its own index; both other reviews describe theirs as smaller or not the largest.

Criterion 02

Link analysis features

Ahrefs offers Site Explorer with historical link and traffic data; Semrush offers backlink analytics and link gap analysis; Moz offers Link Explorer and Domain Authority.

Criterion 03

Reporting metrics

Domain Authority remains a common client-reporting metric and comes from Moz. If a client asks for it by name, Moz solves that directly.

Criterion 04

What else you need

Semrush bundles PPC and research; Ahrefs deliberately does not. Pay for breadth only if you will use it.

  1. 01
    Pays us $0

    The strongest backlink index, wrapped in the cleanest interface.

    Best for
    Anyone whose work is link-led — outreach, digital PR, or competitive link analysis — and agencies managing many verified domains.
    Not for
    Teams who need PPC and social data in the same subscription, or who want a usable free tier for unverified sites.
    Visit official siteAhrefsPays us $0Compare: Ahrefs vs Semrush, Ahrefs vs Moz Pro, Ahrefs vs SE Ranking
  2. 02
    Affiliate link

    The broadest all-in-one SEO and marketing platform.

    Best for
    Teams who need SEO, PPC and competitor research from one subscription and will genuinely use more than the SEO toolkit.
    Not for
    Solo operators who only need keywords and rankings — you will pay for a marketing suite and use a keyword tool.
    Visit official siteSemrushAffiliate linkCompare: Ahrefs vs Semrush, SE Ranking vs Semrush, Moz Pro vs Semrush
  3. 03
    Terms unverified

    The originator of Domain Authority, now the smallest of the majors.

    Best for
    Teams who report on Domain Authority to clients or stakeholders, and beginners who want a gentler on-ramp.
    Not for
    Anyone doing serious competitive link analysis, where the index gap is decisive.
    Visit official siteMoz ProTerms unverifiedCompare: Moz Pro vs Semrush, Ahrefs vs Moz Pro, Moz Pro vs SE Ranking