About 29; min
Picking the wrong SEO tool is an expensive mistake. At $99–$499/month before you add users or API access, Ahrefs, Semrush, and Moz represent a real line item in any marketing budget. This breakdown covers exactly what you get at each pricing tier, where the hidden costs show up, and which tool makes sense depending on how you actually work.
Pricing data is current as of Q1 2026. All prices shown in USD.
Quick Pricing Overview
Ahrefs
Starter: $29/mo | Lite: $129/mo | Standard: $249/mo | Advanced: $449/mo | Enterprise: $1,499/mo
Annual discount: 2 months free (~17% off)
Semrush
Pro: $139.95/mo | Guru: $249.95/mo | Business: $499.95/mo | Enterprise: custom
Annual discount: ~17% off
Moz Pro
Starter: $49/mo | Standard: $99/mo | Medium: $179/mo | Large: $299/mo | Premium: $599/mo
Annual discount: ~20% off
The entry price gap between Ahrefs Starter ($29) and Semrush Pro ($139.95) is significant, but those tiers are not doing the same job. Ahrefs Starter is genuinely limited — no historical data, no rank tracking, no API. Semrush Pro, for all its cost, includes rank tracking for 500 keywords and full site auditing.
Tier-by-Tier Breakdown
Budget Tier: Who Gets You Started for Less?
Moz Pro Starter at $49/month and the new Ahrefs Starter at $29/month both target individuals or very small teams who need basic SEO visibility without a large monthly commitment.
| Feature | Ahrefs Starter ($29) | Moz Starter ($49) |
|---|---|---|
| Tracked keywords | — | 50 |
| Crawl credits/mo | 5,000 | 100,000 pages |
| Projects / campaigns | 1 | 3 |
| Backlink index access | Limited (no history) | Full current index |
| Historical data | No | No |
| Users included | 1 | 1 |
Neither is a real workhorse at this tier. Ahrefs Starter is best understood as a taste-test — useful for validating a single site’s backlink profile or doing light keyword research without committing to a full subscription. Moz Starter’s rank tracking for 50 keywords at $49 beats Ahrefs Starter on utility, though Semrush has no real equivalent at this price point.
Mid Tier: Where Most Professionals Land
This is where the real comparison happens. Most solo consultants and in-house SEOs operating a single site land somewhere in this range.
| Feature | Ahrefs Lite ($129) | Semrush Pro ($139.95) | Moz Standard ($99) |
|---|---|---|---|
| Tracked keywords | 750 | 500 | 300 |
| Site crawl pages/mo | 100,000 | 100,000 | 400,000 |
| Projects | 5 | 5 | 5 |
| Historical data | 6 months | Full | Full (1 year) |
| Backlink index | Full (35T+ links) | Full (43B+ domains) | Full (45T+ links) |
| Content tools | No | No (Guru+) | On-page grader |
| API access | No | No (Business+) | No |
| Extra users (monthly) | $40/user | $45/user | $39/user |
Moz Standard at $99 offers the cheapest entry into full professional SEO tracking, and its crawl limits are generous for the price. But keyword tracking caps at 300, which runs thin fast for active SEOs managing multiple properties. Ahrefs Lite squeezes out 750 tracked keywords for a comparable price to Semrush Pro, which is a meaningful advantage. Semrush’s edge is full historical data access from day one — Ahrefs Lite gives you only 6 months of history, which matters if you’re doing competitive analysis over time.
Power Tier: Standard/Medium — For Growing Teams
| Feature | Ahrefs Standard ($249) | Semrush Guru ($249.95) | Moz Medium ($179) |
|---|---|---|---|
| Tracked keywords | 2,000 | 1,500 | 900 |
| Site crawl pages/mo | 500,000 | 300,000 | 2,000,000 |
| Projects | 20 | 15 | 10 |
| Historical data | 2 years | Full | Full |
| Content tools | No (Advanced+) | Yes (Content Marketing Toolkit) | On-page grader |
| Multi-location rank tracking | Yes | Yes | Yes |
| White-label reports | No | Yes (PDF reports) | Yes |
| API access | No | No | No |
At nearly identical price points, Ahrefs Standard and Semrush Guru split differently. Ahrefs gives you more keywords (2,000 vs 1,500) and more projects (20 vs 15). Semrush Guru includes the Content Marketing Toolkit — topic research, SEO content templates, and a content audit feature — which Ahrefs doesn’t offer until its Advanced plan. For anyone doing both SEO and content strategy work, that difference is worth $70/month in avoided add-ons. Moz Medium at $179 is notably cheaper, and the 2M crawl pages per month is genuinely impressive for the price, but the 900 tracked keywords is a hard ceiling that limits its appeal for multi-client work.
Agency Tier: Advanced and Business Plans
| Feature | Ahrefs Advanced ($449) | Semrush Business ($499.95) | Moz Large ($299) |
|---|---|---|---|
| Tracked keywords | 5,000 | 5,000 | 1,900 |
| Site crawl pages/mo | 1,500,000 | 1,000,000 | 5,000,000 |
| Projects | 50 | 40 | 25 |
| API access | Yes (limited units) | Yes (full API) | No |
| Content tools | Yes (AI writing tools) | Yes (full toolkit) | On-page only |
| White-label | No | Yes | Yes |
| Users included | 1 (+$40/extra) | 3 (+$45/extra) | 3 (+$39/extra) |
| Historical data | Full | Full | Full |
Moz Large at $299 is an outlier — the crawl limits are enormous (5M pages/month) and it’s $150–$200 cheaper than the two alternatives. The tradeoff is keyword tracking capped at 1,900, no API access, and weaker content tooling. If you’re running a technical SEO shop auditing large sites, Moz Large is a serious contender. If you need to track keywords at scale or pull data programmatically, look at Ahrefs Advanced or Semrush Business.
One important note: Semrush Business includes 3 users at base price. Ahrefs Advanced ships with 1 user only. If you have a 3-person team, Semrush Business at $499.95 and Ahrefs Advanced at $449 + $80 (2 extra users) land at nearly the same monthly cost — but Semrush includes white-labeling and full API.
Backlink Index: Who Has the Data?
All three tools claim industry-leading backlink databases. The honest answer is that index size claims are marketing numbers, and real-world comparisons between tools frequently produce different results for the same domain.
- Ahrefs crawls roughly 8 billion pages per day and maintains an index of 35+ trillion links. It is widely considered the most accurate for backlink discovery, particularly for fresh links. The “live” index shows links found within the last 30-60 days; the full index goes back years.
- Semrush claims 43 billion domains in its database and updates its index daily. Its backlink analytics tool is solid but historically considered slightly behind Ahrefs on fresh link discovery.
- Moz claims 40+ trillion links in its index (updated monthly). Monthly update cadence is the real limitation here — for link monitoring or disavow work requiring fresh data, monthly updates create meaningful blind spots.
For active link-building campaigns or disavow work, Ahrefs wins this category on freshness. For competitive research where a slightly older snapshot is acceptable, all three will return comparable data quality.
Keyword Research: Limits and Data Quality
| Metric | Ahrefs | Semrush | Moz |
|---|---|---|---|
| Keyword database size | 28B+ keywords | 25B+ keywords | 1.25B+ keywords |
| Countries covered | 243 | 142 | 170+ |
| Keyword Difficulty model | Backlink-focused KD score | Competitive analysis-based | Page Authority-weighted |
| SERP feature data | Yes | Yes (extensive) | Limited |
| Search intent classification | Yes | Yes | No |
| Questions/PAA data | Yes | Yes | Limited |
Moz’s keyword database is substantially smaller — 1.25 billion versus 25–28 billion for the other two. For US-focused research on competitive terms, this gap rarely surfaces. For long-tail, niche, or non-English keywords, Moz’s database gaps can become a real problem.
Semrush’s keyword data is particularly strong for PPC research alongside SEO — if you’re running Google Ads alongside an organic strategy, Semrush’s combined organic + paid keyword tools offer better ROI than buying two separate tools.
Rank Tracking: Frequency and Accuracy
| Feature | Ahrefs | Semrush | Moz |
|---|---|---|---|
| Update frequency | Daily (Standard+) | Daily | Weekly (daily on Large+) |
| Mobile tracking | Yes | Yes | Yes |
| Local rank tracking | Yes | Yes | Yes (local add-on) |
| SERP volatility alerts | No native | Yes (Sensor tool) | No |
| Competitor rank tracking | Yes | Yes | Yes |
Moz’s weekly rank updates on its Standard and Medium plans are a notable limitation. If you’re monitoring after a major site change or algorithm update, weekly data means flying blind for days at a time. Ahrefs Lite only updates weekly too — daily tracking kicks in from Standard tier ($249). Semrush and Ahrefs both offer daily tracking at their mid tiers, giving a clearer picture of ranking changes as they happen.
The Real Cost: What You’ll Actually Pay
Published prices rarely tell the full story once you factor in user seats, add-ons, and annual commitment discounts.
Solo SEO Consultant
- Ahrefs Standard annual: $249 × 10 months (~$207/mo) = ~$2,490/year — best keyword tracking volume for solo use
- Semrush Guru annual: ~$207/mo = ~$2,490/year — adds content tools
- Moz Medium annual: ~$143/mo = ~$1,716/year — significant savings, but fewer keywords
Small Agency (5-person team, 20 clients)
- Ahrefs Advanced annual: $449 base + 4 users ($160) = $609/mo → ~$6,500/year
- Semrush Business annual: $499.95 base + 2 users ($90) = ~$590/mo → ~$6,300/year (includes white-label)
- Moz Large annual: $299 base + 2 users ($78) = $377/mo → ~$4,000/year (but only 1,900 keywords)
Enterprise / Large Site
- Ahrefs Enterprise starts at $1,499/mo — custom crawl budgets, SSO, dedicated support
- Semrush Enterprise is custom-quoted — typically $5,000+/year for large orgs
- Moz Premium at $599/mo handles large-scale crawling but lacks the raw data depth of the other two at enterprise level
Annual vs Monthly: The Discount Math
All three tools discount annual billing by roughly 16–20%. On a $249/month tool, that’s $500–$600 in savings per year — roughly one or two months free. The decision isn’t complicated: if you’re using the tool consistently, commit annually. The break-even on an annual commitment is roughly 10 months of usage.
Where it gets tricky is when you’re evaluating a new tool. Monthly billing on Semrush Pro for a 2-month evaluation costs $280 total. Switching to annual after you’re confident saves ~$390 over the following year. There is no penalty for switching from monthly to annual mid-cycle on any of the three platforms.
Content Tools: Does It Replace Other Software?
This is one area where the tools diverge significantly at mid-tier pricing.
Semrush Guru and above includes an integrated Content Marketing Toolkit: topic research, SEO writing templates, content audit, and a brand monitoring tool. For teams that would otherwise pay for a separate content optimization tool (Clearscope, Surfer SEO, etc. at $45–$200+/month), Semrush Guru effectively bundles that functionality into the base subscription.
Ahrefs Advanced added AI writing tools and a content grader, but the feature set is less developed than Semrush’s. It’s useful, not replacement-grade for teams doing high-volume content production.
Moz Pro includes a basic on-page grader and keyword recommendations but has no content creation tooling. If content optimization software is on your stack, Moz doesn’t change that.
API Access: Who Needs It and What It Costs
API access unlocks the ability to pull SEO data into dashboards, reporting tools, or custom workflows. All three tools gate API access at higher plan tiers.
- Ahrefs API: Available from Advanced plan ($449/mo). API units are allocated per plan; heavy usage requires purchasing additional units at $50 per 500 units. No API on Standard or below.
- Semrush API: Available from Business plan ($499.95/mo). API calls are metered; Business plan includes a base allocation. Additional API calls purchasable.
- Moz API: Sold separately from Moz Pro through the Moz API pricing page. Entry-level Moz API is $50/month for basic domain/URL metrics; production-scale access runs $500+/month.
If API access is a hard requirement — you’re building custom dashboards or automating rank reporting — Moz’s separate API pricing can push total costs higher than Ahrefs or Semrush at their respective API-capable tiers.
Verdict: Which Tool Wins at Each Use Case?
Best Overall for SEO Professionals: Ahrefs Standard ($249/mo)
The most complete SEO research tool at this price point. Backlink data quality, keyword database depth, and site audit capabilities outperform the competition. The lack of content tools is the only real gap. For pure SEO work, nothing else at $249 matches it.
Best Value for Solo Users: Moz Standard ($99/mo)
If budget is the primary constraint and you’re managing one or two sites, Moz Standard at $99 gives you full rank tracking, a solid backlink index, and generous crawl limits. The keyword tracking cap (300 keywords) and weekly rank updates are the concessions, but for a single-site operator with a tight budget, it delivers core SEO functionality at half the price of the alternatives.
Best for Agencies Needing Content + SEO: Semrush Guru ($249.95/mo)
The content marketing toolkit bundled into Guru tier means agencies can drop a separate content optimization subscription. White-label PDF reports, full historical data, and 1,500 tracked keywords round out a solid package. Slightly fewer keywords than Ahrefs Standard for nearly the same price, but the content tools close that gap for teams doing both.
Best for Large Agencies: Semrush Business ($499.95/mo)
Three included users, white-label reporting, full API access, and 5,000 tracked keywords in one subscription. For a team of 3–5 handling 30+ clients, the per-user economics work out better than Ahrefs once you add seats.
