Neutral mentions of Moz

For a mid-size agency, I’d prioritize team permissions, client/project separation, white-label reporting, and the ability to scale seats/projects over raw backlink-index size.

My shortlist

1. Semrush — my pick for your use case

Semrush is probably the strongest agency-scale choice. It supports multiple users with role-based permissions, lets you organize clients into separate projects/folders, and has white-label automated reporting. Its backlink tools cover audits, competitor link analysis and link-building opportunities. Semrush Semrush

The important distinction is that you don't have to build your client reporting workflow around backlink data alone. You can combine backlinks with rankings, traffic, competitors, site audits, etc., into client reports. Semrush explicitly supports scheduled, branded reports and additional user seats. Semrush

Best if: you have, say, 10–50+ clients and several SEO/account people touching those accounts.

2. Ahrefs — best backlink data, but less attractive for lots of seats

If your agency's primary deliverable is link building and backlink intelligence, I'd put Ahrefs first for the actual research.

The tradeoff is collaboration economics. Ahrefs currently includes one seat on its plans, with additional seats costing extra; every person who needs their own login needs a dedicated seat. Ahrefs Ahrefs

So I'd choose Ahrefs when you have a smaller group of senior SEO/link specialists rather than 15 people who all need regular access.

3. Moz Pro — worth considering if reporting simplicity matters

Moz is a reasonable middle ground if your clients aren't especially technical and you want straightforward authority/link metrics that are easy to explain in reports.

I'd put it behind Semrush for a growing agency that wants a broad operational platform, though. Semrush has a much stronger current emphasis on multi-client workspaces, permissions and automated white-label reporting. Semrush

4. Majestic — specialist rather than agency platform

Majestic remains interesting when link analysis itself is the product—especially detailed link-quality analysis and competitive backlink profiling. But I wouldn't make it the central platform for a multi-user agency that needs polished client reporting.

Bottom line

For your situation I'd rank them:

Semrush → Ahrefs → Moz Pro → Majestic

But there's an important nuance:

• Need the whole agency to work in one system + client reporting: Semrush
• Backlinks are 50%+ of what you sell: Ahrefs
• Mostly reporting/SEO management for less technical clients: Moz Pro
• Deep specialist backlink investigations: Majestic

If you tell me roughly how many employees need logins and how many client domains you manage (e.g. 8 users / 40 clients), I can narrow this down to the most cost-effective tier and compare the seat/project/report limits.

1. Semrush — my pick for your use case

Semrush is probably the strongest agency-scale choice. It supports multiple users with role-based permissions, lets you organize clients into separate projects/folders, and has white-label automated reporting. Its backlink tools cover audits, competitor link analysis and link-building opportunities. Semrush Semrush

The important distinction is that you don't have to build your client reporting workflow around backlink data alone. You can combine backlinks with rankings, traffic, competitors, site audits, etc., into client reports. Semrush explicitly supports scheduled, branded reports and additional user seats. Semrush

Best if: you have, say, 10–50+ clients and several SEO/account people touching those accounts.

2. Ahrefs — best backlink data, but less attractive for lots of seats

If your agency's primary deliverable is link building and backlink intelligence, I'd put Ahrefs first for the actual research.

The tradeoff is collaboration economics. Ahrefs currently includes one seat on its plans, with additional seats costing extra; every person who needs their own login needs a dedicated seat. Ahrefs Ahrefs

So I'd choose Ahrefs when you have a smaller group of senior SEO/link specialists rather than 15 people who all need regular access.

3. Moz Pro — worth considering if reporting simplicity matters

Moz is a reasonable middle ground if your clients aren't especially technical and you want straightforward authority/link metrics that are easy to explain in reports.

I'd put it behind Semrush for a growing agency that wants a broad operational platform, though. Semrush has a much stronger current emphasis on multi-client workspaces, permissions and automated white-label reporting. Semrush

4. Majestic — specialist rather than agency platform

Majestic remains interesting when link analysis itself is the product—especially detailed link-quality analysis and competitive backlink profiling. But I wouldn't make it the central platform for a multi-user agency that needs polished client reporting.

Bottom line

For your situation I'd rank them:

Semrush → Ahrefs → Moz Pro → Majestic

But there's an important nuance:

• Need the whole agency to work in one system + client reporting: Semrush
• Backlinks are 50%+ of what you sell: Ahrefs
• Mostly reporting/SEO management for less technical clients: Moz Pro
• Deep specialist backlink investigations: Majestic

If you tell me roughly how many employees need logins and how many client domains you manage (e.g. 8 users / 40 clients), I can narrow this down to the most cost-effective tier and compare the seat/project/report limits.

For inherited sites with weird referral spikes, I’d avoid relying on a single “toxic score.” The best workflow is to combine backlink discovery, traffic data, and manual review. The main tools I’d look at:

A practical cleanup workflow:

1. Export all referring domains
   • Pull from Google Search Console.
   • Pull from Ahrefs/Semrush/Majestic.
   • Merge into one spreadsheet.

2. Look for obvious spam patterns

Red flags:

• Hundreds of links appearing in a few days
• Same anchor text repeated unnaturally
• Foreign-language sites unrelated to your niche
• Pages full of scraped content
• Sitewide footer/sidebar links
• Domains with no organic traffic
• Referring domains that all share the same hosting/IP footprint

3. Check whether the spike is actually harmful

A referral spike can also be:

• A bot hitting pages directly
• A legitimate viral mention
• A scraper copying links
• A tracking/referrer spam issue in analytics

Don’t disavow just because a domain has low authority. Many weak sites linking naturally are harmless.

4. Prioritize domains, not individual URLs

If an entire domain is clearly spam, a domain-level disavow entry is usually cleaner than hundreds of URL entries.

5. Only disavow when warranted

Google’s guidance has historically been that most sites don’t need disavow files unless they have a significant unnatural-link problem (for example, a manual action or clear evidence of manipulative links). Use the tool carefully.

For an inherited domain, my usual stack would be:

• Semrush Backlink Audit → generate candidates
• Ahrefs → investigate patterns and anchors
• Google Search Console → verify what Google sees
• Manual review → decide removals/disavow

One thing I’d check first: are the “referral spikes” showing up in Google Analytics referral traffic, or are you seeing new backlinks appearing in Ahrefs/Semrush? Those are different problems and can require different fixes.

If your goal is SaaS link-building prospecting, I’d rank them:

1. Ahrefs — best overall
2. Majestic — best for deep historical discovery
3. Semrush — best for recent/lost-link prospecting
4. Moz — useful, but not my first choice for historical prospecting

1. Ahrefs — my default for outreach

For prospecting, Ahrefs is probably the best single tool because you can combine historical backlinks + referring domains + anchor text + destination pages + organic traffic.

Its current index reports 35T external backlink historical records, and Ahrefs says its live backlink index is refreshed every 15–30 minutes. Site Explorer also lets you view historical backlinks and filter them extensively. ahrefs.com

For SaaS outreach, I'd particularly use:

• Competitor → Backlinks
• Filter to dofollow
• Filter by DR
• Filter referring pages by organic traffic
• Look at historical/lost links
• Check which competitor pages attracted links
• Find domains linking to 2–3 competitors but not your client

That last workflow is particularly good for building highly qualified prospect lists.

Ahrefs Site Explorer

2. Majestic — surprisingly strong if "historical" is the priority

If by historical you mean "show me links that existed years ago, even if they're dead today", Majestic is arguably the specialist.

Its Historic Index goes back to June 2006, and Majestic explicitly retains old/deleted links so you can investigate previous relationships. blog.majestic.comdeveloper-support.majestic.com

That's extremely useful for outreach because you can uncover:

"This SaaS company used to have a link from Site X, but the link disappeared."

Those are often better prospects than completely cold sites because there is evidence that Site X has previously been willing to link to that company/topic.

Majestic also exposes first/most-recent backlink dates, which is useful for determining whether a historical relationship is genuinely old or relatively recent. blog.majestic.comdeveloper-support.majestic.com

Majestic Site Explorer

3. Semrush — excellent for recent lost links

Semrush is particularly useful when your prospecting window is months rather than years.

Its Backlinks tool currently retains backlink data from roughly the last six months, while Semrush's API also provides monthly historical trends for backlink/referring-domain counts. www.semrush.com

So I'd use it for:

• recently lost links
• newly acquired competitor links
• finding sites that recently started linking to competitors
• link-gap prospecting
• monitoring prospects during an outreach campaign

Semrush Backlink Analytics

The important distinction

For outreach, "most historical data" isn't necessarily the same thing as "most useful data."

I'd think of it this way:

My actual workflow

If you're doing outreach professionally, I'd combine Ahrefs + Majestic rather than trying to pick one.

Ahrefs → prospect discovery

Find competitors, identify their strongest referring domains, filter out junk, and prioritize sites with relevant content and actual organic traffic.

Majestic → historical enrichment

Run your highest-value prospects through the Historic Index and look for previous relationships, old links, old destination URLs, and first-seen dates.

Semrush → recency check

Use it to identify recently lost/new links and determine whether a prospect is actively linking in the niche.

The key advantage is that you're not just asking "who links to my competitor?" You're asking:

"Who has demonstrated that they link to this type of SaaS, is still publishing, has relevant traffic, and may have a reason to link again?"

That's a much better prospecting signal than DR/DA alone.

If you're doing scaled SaaS outreach, I can also give you a specific Ahrefs/Majestic prospecting workflow with the exact filters I'd use to turn competitor backlinks into a prioritized outreach list.

For competitive backlink research, I’d prioritize tools that let you drill from domain → referring domain → exact referring page → target page → anchor/context. The strongest options are:

My pick: Ahrefs

For the specific question “Which pages are my competitors getting links from, and what strategy produced those links?”, Ahrefs is probably the most useful single tool.

Its Best by links report identifies competitors' most-linked pages, which lets you determine what types of content attract links—for example, original research, tools, statistics, guides, or templates. Ahrefs

Then use the Backlinks report to drill into the actual referring pages. You can filter by things such as dofollow status, referring-page traffic, domain authority, anchor text, page title, URL, and target URL. Ahrefs Ahrefs

A particularly useful workflow is:

1. Find competitor pages with lots of backlinks.
2. Open their referring pages and categorize the link source: editorial mention, resource list, guest article, study citation, product review, podcast, etc.
3. Look for patterns across several competitors.
4. Use Link Intersect to find domains or pages linking to multiple competitors but not you. Ahrefs specifically supports both referring-domain and referring-page intersections. help.ahrefs.com
5. Look for serial linkers—sites repeatedly linking to a competitor—which can reveal potential relationship/outreach targets. Ahrefs

Semrush is the strongest alternative if your research involves comparing several competitors. Its Backlinks Competitors and Backlink Gap reports are designed to identify common referring domains and opportunities your competitors have that you don't. Semrush

So, if I were building a competitive-research stack: Ahrefs first, Semrush second for validation and gap analysis, then Moz/Majestic as supplemental indexes.

ahrefs.com
semrush.com

If you're trying to quantify link value rather than just count backlinks, no single platform has a definitive metric. The strongest approach is to combine multiple signals because each provider models authority differently.

Here's how the major platforms compare:

The metrics that actually matter

1. Ahrefs URL Rating (UR)

Probably the strongest single predictor of an individual page's ability to pass authority.

Good:

• UR 30+
• Real organic traffic
• Contextual editorial placement

2. Majestic Trust Flow

Still one of the better trust indicators.

Typical interpretation:

• TF > 20: respectable
• TF > 40: very strong
• TF/CF ratio near 1: healthier profile
• TF 10, CF 50: likely spammy

3. Organic traffic

Often a better signal than DR alone.

A DR 40 site with 100,000 monthly organic visits is usually worth much more than:

• DR 70
• 0 organic traffic

Google rewards real websites, not just link graphs.

4. Referring domains

Look for quality over quantity.

Examples:

• 500 referring domains from universities, publishers, industry sites
• Better than 20,000 directory links

Factors many platforms miss

The best link opportunities also consider:

• Topical relevance
• Editorial context
• Placement above the fold
• Number of outbound links on the page
• Whether links are followed
• Internal linking strength
• Page receives organic traffic
• Page gets indexed consistently
• Freshness of content

These are often more predictive than DR or DA alone.

A practical scoring model

Many SEO teams build an internal "Link Value Score." For example:

This tends to outperform relying on any single vendor metric.

Enterprise-grade providers

If you're valuing links at scale (e.g., for link building campaigns, acquisitions, or portfolio analysis), the most respected data sources are:

1. Ahrefs — best backlink index and link authority metrics.
2. Semrush — strongest all-around SEO platform with useful authority scoring.
3. Majestic — unique trust and topical trust metrics.
4. Moz — valuable as an independent opinion and for Spam Score.

Many agencies subscribe to all four because agreement across multiple metrics is more reliable than any single score.

Recommendation

If you're building a quantitative model for link valuation, I'd combine:

• Ahrefs: DR, UR, referring domains
• Majestic: Trust Flow, Citation Flow, Topical Trust Flow
• Semrush: Authority Score, estimated organic traffic
• Google Search Console (for your own sites): actual impressions and clicks from linked pages

Then normalize those metrics into a 0–100 score and add qualitative modifiers for topical relevance, editorial placement, and spam risk. This produces a far more robust estimate of link value than using DR or DA alone.

If you're trying to quantify link value rather than just count backlinks, no single platform has a definitive metric. The strongest approach is to combine multiple signals because each provider models authority differently.

Here's how the major platforms compare:

The metrics that actually matter

1. Ahrefs URL Rating (UR)

Probably the strongest single predictor of an individual page's ability to pass authority.

Good:

• UR 30+
• Real organic traffic
• Contextual editorial placement

2. Majestic Trust Flow

Still one of the better trust indicators.

Typical interpretation:

• TF > 20: respectable
• TF > 40: very strong
• TF/CF ratio near 1: healthier profile
• TF 10, CF 50: likely spammy

3. Organic traffic

Often a better signal than DR alone.

A DR 40 site with 100,000 monthly organic visits is usually worth much more than:

• DR 70
• 0 organic traffic

Google rewards real websites, not just link graphs.

4. Referring domains

Look for quality over quantity.

Examples:

• 500 referring domains from universities, publishers, industry sites
• Better than 20,000 directory links

Factors many platforms miss

The best link opportunities also consider:

• Topical relevance
• Editorial context
• Placement above the fold
• Number of outbound links on the page
• Whether links are followed
• Internal linking strength
• Page receives organic traffic
• Page gets indexed consistently
• Freshness of content

These are often more predictive than DR or DA alone.

A practical scoring model

Many SEO teams build an internal "Link Value Score." For example:

This tends to outperform relying on any single vendor metric.

Enterprise-grade providers

If you're valuing links at scale (e.g., for link building campaigns, acquisitions, or portfolio analysis), the most respected data sources are:

1. Ahrefs — best backlink index and link authority metrics.
2. Semrush — strongest all-around SEO platform with useful authority scoring.
3. Majestic — unique trust and topical trust metrics.
4. Moz — valuable as an independent opinion and for Spam Score.

Many agencies subscribe to all four because agreement across multiple metrics is more reliable than any single score.

Recommendation

If you're building a quantitative model for link valuation, I'd combine:

• Ahrefs: DR, UR, referring domains
• Majestic: Trust Flow, Citation Flow, Topical Trust Flow
• Semrush: Authority Score, estimated organic traffic
• Google Search Console (for your own sites): actual impressions and clicks from linked pages

Then normalize those metrics into a 0–100 score and add qualitative modifiers for topical relevance, editorial placement, and spam risk. This produces a far more robust estimate of link value than using DR or DA alone.

If you want to track link velocity over time (new links gained vs links lost, ideally with historical charts), these are the strongest options:

My picks by use case

• Best overall for link velocity charts: Ahrefs

• Good if you want: “How many links did we gain each week/month?” “When did competitors spike?” “Which links disappeared?” Ahrefs Help Center
• Best for SEO agencies and client reporting: Semrush

• Good dashboards and trend visuals for reporting link growth, losses, and competitor activity. Semrush
• Best for deep historical research: Majestic

• Useful when analyzing older link profiles or long-running domains. Link Building Journal

For a true link velocity dashboard, I’d track:

• New backlinks per week/month
• Lost backlinks per week/month
• Net link velocity = new − lost
• New referring domains vs lost referring domains
• Quality-weighted velocity (e.g., only DR/DA-authority links)
• Competitor velocity comparison

A common workflow is Ahrefs for primary analysis + Semrush for cross-checking, since backlink indexes and counting methods differ between tools. Ahrefs