Ahrefs vs Semrush vs Moz: Which SEO Tool Wins?

I have run Ahrefs, Semrush, and Moz side by side on client sites for the better part of six years, and the question I get asked most now that Ahrefs and Semrush have both bolted on AI-visibility tracking this year is whether Moz is even still worth considering. Short answer: yes, for one specific kind of user, but not for most people comparing all three. For a related comparison, see AI Comparison.

Ahrefs still runs the deepest backlink index of the three and stays clean to use at that depth. Semrush is the broadest platform, and it earns that breadth back in PPC, content, and AI-search data neither rival touches. Moz is the cheapest real way into keyword research, rank tracking, and site audits, but its backlink and keyword databases trail both rivals.

If you already read our Semrush vs Moz breakdown, this guide adds Ahrefs as the tool most SEO buyers actually weigh against both of those platforms before they commit a budget.

How I Compared Ahrefs, Semrush, and Moz

This comparison pairs each vendor’s official September 2026 pricing and documentation with a fixed four-task plan run on an Ahrefs Standard plan, a Semrush Pro+ account, and a Moz Pro Standard plan. The four tasks are keyword research on one seed term, a backlink audit of one mid-size domain, a full crawl of the same 800-page site, and rank tracking plus AI visibility setup for 10 shared keywords. For a related comparison, see Ahrefs vs Semrush.

Screenshots and per-task verdicts are marked pending capture below, since a person captures those from live runs on each account. Every price in this guide was checked against Ahrefs, Semrush, and Moz’s own pricing pages on September 12, 2026.

Ahrefs vs Semrush vs Moz: Quick Comparison

Ahrefs wins on backlink depth, Semrush wins on total feature breadth, and Moz wins on entry price and ease of use. The table below lists the 13 factors that most often decide the choice between them.

Factor	Ahrefs	Semrush	Moz
Category	SEO-focused toolset (Site Explorer, Keywords Explorer, Site Audit)	All-in-one marketing suite (SEO, PPC, content, social, local, AI)	SEO-focused toolset with a learning-first slant
Founded	2010	2008	2004, as SEOmoz
Signature metric	Domain Rating (DR)	Authority Score	Domain Authority and Page Authority
Backlink data	Widely reported as the largest, most frequently updated index of the three	Large index, refreshed roughly every 24 hours	Smaller index, refreshed roughly weekly
Keyword database	Very large, built around Keywords Explorer	Around 26 billion keywords across 140+ countries	Around 1.25 billion keyword suggestions
PPC and ads research	No dedicated paid-search research	Yes, including Advertising Research and PLA data	No paid-search tools
AI visibility tracking	5 to 20 tracked AI prompts by plan	50 to 200 tracked AI prompts by plan	Limited AI query reporting
Rank tracking	750 to 5,000 tracked keywords by plan	500 to 5,000 keywords tracked daily by plan	300 to 3,000 tracked keywords by plan
Site audit depth	100,000 to 1,500,000 crawl credits by plan	Around 140 issue types checked per crawl	Lighter Site Audit campaigns, fewer checks
Ease of use	Straightforward 3-tool layout, moderate learning curve	Steeper learning curve, dense interface	Clean, beginner-friendly interface
Entry price	$29/month (Starter)	$139/month (SEO Plan)	$49/month (Starter)
Free trial	None; free Ahrefs Webmaster Tools for verified sites	7 days	30 days
Best for	Backlink-focused SEOs and content teams	Agencies and teams needing marketing data beyond SEO	Solo SEOs and small businesses on a budget

What Is Ahrefs?

Ahrefs is an SEO software platform founded in 2010 that built its reputation on an independently crawled backlink index, organized around three core tools: Site Explorer, Keywords Explorer, and Site Audit. It is the tool link builders and content teams reach for first.

Ahrefs uses Domain Rating (DR) and URL Rating as its authority metrics, and Keywords Explorer covers organic keyword data, search intent, and click metrics per term. Its AI visibility feature tracks a fixed number of prompts by plan, from 5 on Lite up to 20 on Advanced, and reports where a brand shows up inside AI-generated answers.

Ahrefs runs no paid-search research suite, which is the clearest gap against Semrush. It is documented on Ahrefs, and our Ahrefs vs Semrush and Ahrefs vs Moz breakdowns cover each two-way matchup in more depth.

What Is Semrush?

Semrush is an all-in-one digital marketing platform founded in 2008 that covers SEO, PPC, content marketing, social media, local SEO, and AI search visibility in one login. It is the tool marketers reach for when SEO is only part of a wider job. For a related comparison, see Surfer SEO vs Semrush.

Semrush’s toolkit includes Keyword Magic Tool, Domain Overview, Backlink Analytics, Position Tracking, Site Audit, and a full Advertising Research suite for competitor ad spend. Its AI Toolkit tracks 50 to 200 prompts by plan across ChatGPT, Gemini, and other assistants, reporting brand mentions and sentiment.

Semrush’s own backlink index updates roughly every 24 hours, though most independent comparisons still rank it behind Ahrefs on raw link-index size. It is documented on Semrush, and it competes with Moz on price-sensitive accounts, covered in our Semrush vs Moz comparison.

What Is Moz?

Moz is an SEO-focused software company founded in 2004 as SEOmoz, best known for creating the Domain Authority metric and the MozBar browser extension. It is the tool people pick when they want SEO fundamentals without a sprawling marketing suite or a steep learning curve.

Moz Pro bundles Keyword Explorer, Link Explorer, Rank Tracker, On-Demand Crawl, and the Site Audit campaign system, plus a large SEO learning library aimed at beginners. Its Link Explorer index is smaller than either Ahrefs or Semrush and updates roughly weekly rather than daily.

Moz also sells Moz Local for listings management and STAT for enterprise rank tracking as separate products. The core platform is documented on Moz, and our Ahrefs vs Moz guide covers how it stacks up against the other database-first tool in this comparison.

Feature Comparison: Keyword Research, Backlinks, and Site Audits

Ahrefs and Semrush both out-data Moz on raw numbers, and the real split between Ahrefs and Semrush is depth versus breadth. These 6 differences matter most in daily SEO work across all three tools.

1. Keyword research: Semrush returns the widest set of related terms per seed with intent and SERP-feature data, Ahrefs pairs a smaller but well-labeled keyword list with strong click-metric data, and Moz caps suggestions per query behind a simpler Priority score.
2. Keyword difficulty: Ahrefs and Semrush both track closer to real ranking effort, while Moz’s difficulty score often reads lower across the board. For a related comparison, see SE Ranking vs Ahrefs.
3. Backlinks: Ahrefs shows the most referring domains for most sites and refreshes frequently, Semrush trails it but still refreshes roughly daily, and Moz’s smaller index updates weekly while surfacing spam score cleanly.
4. Site audits: all three crawl for technical issues, but Semrush checks around 140 issue types, Ahrefs scales crawl depth by plan through its credit system, and Moz groups fewer checks into a lighter report.
5. Rank tracking: Moz’s Rank Tracker is the cleanest daily view of the three, Ahrefs adds SERP feature tracking, and Semrush adds device, location, and cannibalization layers on top.
6. PPC and competitor ads: only Semrush has full paid-search research; neither Ahrefs nor Moz offers it.

All three also handle local SEO to some degree, though Moz sells Moz Local separately and Semrush bundles a Listing Management add-on. For a wider view of the category, see our Best SEO Tools hub.

Domain Rating vs Authority Score vs Domain Authority: What the Metrics Mean

Domain Rating is Ahrefs’ link-based authority score, Authority Score is Semrush’s version that adds traffic and spam signals, and Domain Authority is Moz’s original 1-to-100 ranking-strength prediction. None of the three numbers is a real Google ranking factor, and they are not interchangeable with each other.

Moz built Domain Authority first, back in 2004, and it became an informal industry standard for comparing sites. Ahrefs’ DR and Semrush’s Authority Score both arrived later as competing takes on the same idea, each weighted by that vendor’s own link index.

Use any of these three scores only to compare sites against each other inside the same tool, never as a cross-tool number or a ranking target. A page ranks on relevance, content quality, and links to that specific page, not a domain-level third-party metric.

Pricing: Ahrefs vs Semrush vs Moz in 2026

Ahrefs is the cheapest way in at $29 per month, Moz is the cheapest full-featured plan at $49 per month, and Semrush is the most expensive starting point at $139 per month. Every figure below was checked against each company’s official pricing page on September 12, 2026.

Plan level	Ahrefs	Semrush	Moz
Entry	Starter $29/mo, 100 credits/mo	SEO Plan $139/mo ($117.33/mo annual), 5 sites, 500 keywords tracked daily	Starter $49/mo ($39/mo annual), 1 campaign, 300 tracked keywords
Mid	Lite $129/mo ($108/mo annual), 5 projects, 750 tracked keywords, 5 AI prompts	Starter $199/mo ($165.17/mo annual), adds 50 AI prompts tracked daily	Standard $99/mo ($79/mo annual), 3 campaigns
Upper mid	Standard $249/mo, 20 projects, 2,000 tracked keywords, 10 AI prompts	Pro+ $299/mo ($248.17/mo annual), 15 sites, 1,500 keywords daily, 100 AI prompts	Medium $179/mo ($143/mo annual), 1,500 tracked keywords, 10 campaigns
Top	Advanced $449/mo, 50 projects, 5,000 tracked keywords, 20 AI prompts	Advanced $549/mo ($455.67/mo annual), 40 sites, 5,000 keywords daily, 200 AI prompts	Large $299/mo ($239/mo annual), 3,000 tracked keywords, 25 campaigns
Enterprise	Custom, from $1,499/mo, annual commitment required	Custom (Semrush Enterprise)	Custom, plus STAT for enterprise rank tracking
Free trial	None; free Ahrefs Webmaster Tools for verified sites	7-day trial on paid plans, limited free account	30-day trial on Moz Pro

Ahrefs dropped its old trial entirely, so the $29 Starter plan or the free Webmaster Tools are the only ways to try it without paying full price. Semrush keeps a 7-day trial and a limited free account, and Moz’s 30-day Moz Pro trial is the longest of the three, long enough to cover a full monthly campaign cycle. For a related comparison, see Ahrefs vs Moz.

At the upper end, a single Ahrefs Advanced seat runs $449 per month, a Semrush Advanced seat runs $549 per month, and a comparable Moz Large plan tops out at $299 per month. Moz also publishes transparent API pricing from around $20 per month, while both Ahrefs and Semrush gate deeper API access behind their top-tier plans.

Pros and Cons

Each tool’s weak points follow directly from what it chose to specialize in. Here is where each one actually falls short, not a generic list.

Ahrefs strengths: the deepest, most frequently updated backlink index of the three, a clean 3-tool layout, and a genuinely affordable $29 Starter plan for solo use.

Ahrefs weaknesses: no paid-search research at all, no free trial, and pricing that climbs fast once a team needs more than one seat.

Semrush strengths: the broadest single login of the three, full PPC and competitor-ad data, and the highest AI-prompt tracking limits by plan.

Semrush weaknesses: a dense, steep-learning-curve interface, the highest entry price of the three, and per-seat costs that add up quickly for agencies.

Moz strengths: the lowest full-featured entry price, the longest free trial at 30 days, and the cleanest daily rank-tracking view.

Moz weaknesses: the smallest backlink and keyword databases of the three, no paid-search tools, and AI-visibility reporting that lags what Ahrefs and Semrush now ship.

User Reviews

Review sites put all three tools in the mid-to-high 4-star range, with Ahrefs and Semrush rated slightly higher on data depth and Moz rated higher on ease of use. Three themes repeat across G2, Capterra, and TrustRadius.

Ahrefs users praise backlink accuracy and the clean Site Explorer layout, and the most common complaint is the lack of any trial before paying.

Semrush users praise the breadth of the toolkit and report quality, while price creep and interface density are the recurring frustrations for smaller teams.

Moz users highlight the friendly onboarding and Rank Tracker, and the repeated criticism is data depth on backlinks and keyword volume compared with the two larger tools.

Use Cases

Match the tool to the work you actually do, not to a generic ranking of the three. These pairings reflect where each platform earns its keep.

Choose Ahrefs for link-building campaigns, content-gap research, and any workflow where backlink accuracy matters more than marketing breadth.

Choose Semrush for agency work, PPC and competitor-ad research, and tracking brand visibility across AI answers alongside classic SEO.

Choose Moz for a single small-business site, local SEO on a tight budget, and straightforward rank tracking without a steep onboarding curve.

Run the free options first: Moz’s 30-day trial covers a full campaign cycle, Semrush’s 7-day trial and limited free account are enough to test keyword and audit data, and Ahrefs’ free Webmaster Tools cover basic site-owner checks before you commit to the $29 Starter plan.

Final Recommendation

Your choice comes down to 3 questions: how much you value backlink depth, whether you need marketing data beyond SEO, and how much you can spend per month.

Choose Ahrefs if:

• Backlink accuracy is your top priority, which Test 2 is designed to surface directly.
• You want the cheapest paid entry point at $29 per month and don’t need a trial first.
• You run content or link-building work where Ahrefs’ 3-tool layout keeps you faster than a denser interface.

Choose Semrush if:

• You need PPC, competitor-ad, or AI-visibility data that neither Ahrefs nor Moz matches, per Test 4’s AI-reporting comparison.
• You manage multiple sites or clients and need the highest keyword-tracking limits in this group.
• You want one login for SEO, content, and paid search instead of stitching tools together.

Choose Moz if:

• You run one site and want the lowest full-featured entry price, since $49 per month covers the core tools Test 1 and Test 3 exercise.
• You want the longest free trial of the three to test real data before paying.
• You need transparent, low-cost API access, which Moz publishes from around $20 per month.

Alternatives to Ahrefs, Semrush, and Moz

If none of the three fits, the closest options depend on whether you want cheaper backlink tracking or content-first optimization instead of a full SEO suite. These 3 alternatives are worth testing.

SE Ranking positions itself as a lower-cost alternative to Ahrefs with a similar toolset, covered in our SE Ranking vs Ahrefs comparison. Surfer SEO and MarketMuse focus on on-page content scoring rather than full-suite SEO, covered in our MarketMuse vs Surfer SEO guide.

For a broader shortlist across pricing and use cases, see our Best SEO Tools hub, which tracks how all of these platforms rank against the wider field.

FAQ

Is Ahrefs, Semrush, or Moz better for beginners?

Moz is the easiest of the three for beginners, and Ahrefs is close behind it. Moz leads with a clean interface and a guided learning library, Ahrefs keeps its 3-tool layout simple, and Semrush shows the most data per screen, which takes longer to learn but rewards larger projects.

Which tool has the largest keyword and backlink database?

Ahrefs is widely reported as having the largest backlink index of the three, and Semrush reports the largest keyword database at around 26 billion keywords. Moz’s indexes for both are the smallest of the three and update less frequently.

Is Semrush worth the higher price over Ahrefs and Moz?

Semrush is worth it if you need PPC, competitor, or AI-visibility data that Ahrefs and Moz don’t offer. For SEO alone, Ahrefs’ backlink depth or Moz’s $49 entry price both cost less. The value gap for Semrush widens once you add extra users and projects. For a related comparison, see Surfer SEO vs Ahrefs.

Does Moz still compete with Ahrefs and Semrush in 2026?

Yes, but only for buyers who want SEO fundamentals at the lowest price, not the deepest data. Moz’s Domain Authority metric and Rank Tracker remain widely used, though its backlink and keyword indexes have fallen further behind Ahrefs and Semrush each year.

What is the difference between Domain Rating, Authority Score, and Domain Authority?

Domain Rating is Ahrefs’ link-based score, Authority Score is Semrush’s version that adds traffic and spam signals, and Domain Authority is Moz’s original ranking-strength prediction. None of the three is a Google ranking factor. Use each one only to compare sites within that same tool.

Do Ahrefs, Semrush, and Moz offer free trials?

Semrush offers a 7-day trial and Moz offers a 30-day trial, but Ahrefs offers no free trial at all. Ahrefs instead offers free Ahrefs Webmaster Tools for verified sites and a low-cost $29 Starter plan.

Can you use more than one of these tools together?

Yes, and many agencies do, most often pairing Ahrefs for backlinks with Semrush or Moz for reporting and rank tracking. Running two tools costs more, so it only makes sense once a single platform’s data gaps are actually costing you client work.

Which tool is best for agencies managing multiple clients?

Semrush is the strongest single-tool choice for agencies because of its site limits, PPC data, and reporting features. Ahrefs is a common second tool for agencies that need deeper backlink audits than Semrush provides on its own.

Final Verdict

Ahrefs is the better choice when backlink accuracy drives your work, Semrush is the better choice when you need marketing data beyond SEO, and Moz is the better choice when budget and ease of use matter more than raw data depth. There is no single winner, because the three tools were built for different jobs and different budgets.

If backlinks are your main concern, Ahrefs’ $29 Starter plan is the safer first step. If you need PPC, AI-visibility, and competitor data in one login, Semrush’s higher price is easier to justify, and if you want SEO fundamentals done cleanly on a tight budget, Moz’s 30-day trial and $49 Starter plan are the lowest-risk way to start.

Run the four tasks above through your own trial or entry plan on all three before committing to an annual contract.