Ahrefs vs Semrush vs Moz: Which SEO Tool Should Beginners Use? (+ Free Alternatives)
Once you have a niche shortlist, the next question is always the same: which SEO tool should I pay for? Ahrefs, Semrush and Moz all promise to show you what people search for and who you’re up against. The honest answer is that you need one of them, not three, and you don’t need it on day one. Here’s how they compare for a beginner in November 2026, which one I use, and the free tools that cover most of the job until you’re ready to pay.
Ahrefs and Semrush are the two best all-round SEO tools for beginners; pick one and learn it. Moz is cheaper but has smaller keyword data. Free tools like Google Search Console, Ahrefs Webmaster Tools and Google Keyword Planner cover the basics.
- Pay for one SEO tool at a time. Two tools with overlapping data is the most common way beginners waste money.
- Ahrefs is strongest for backlinks and competitor research, and it’s the tool I use. It has no free trial, but it has a $29 Starter plan and a free plan for your own verified sites.
- Semrush is the broadest all-in-one toolkit and has a free trial, but its Pro plan is the most expensive starting point of the three.
- Moz Pro is the cheapest paid entry and easy to learn, with a smaller keyword database.
- Until your site is live and you’re publishing every week, free tools plus one well-planned free trial are enough.
- All three charge in US dollars, so South African readers should budget for exchange-rate swings.
The short verdict: pick one, don’t pay for two
All three tools do the same core jobs: estimate how many people search for a keyword, score how hard it is to rank, show which sites link to a page and show which keywords a competitor ranks for. The numbers differ a little from tool to tool, because each one builds its own estimates, but a beginner won’t make a better decision by paying for two sets of estimates.
So my verdict is simple:
- Choose Ahrefs if you want the strongest backlink and competitor data and you’re happy to start small on the Starter plan or use the free plan for your own site.
- Choose Semrush if you want the widest toolkit in one place and you’d like a free trial before paying.
- Choose Moz if budget is the deciding factor and you want the gentlest learning curve.
Whichever you pick, learn it properly for a few months before you even look at another one. Knowing one tool well beats knowing three badly.
This isn’t a niche question, by the way. In Ahrefs, “semrush vs ahrefs” gets 4,300 US searches a month and “moz vs ahrefs” gets 2,400. Lots of people stall at exactly this step, so don’t let it hold you up for more than a day.
Ahrefs vs Semrush vs Moz compared
Here’s how the three line up on the things a beginner actually cares about. Prices change often, so treat this as a snapshot and check the official pricing page before you pay.
| Ahrefs | Semrush | Moz Pro | |
|---|---|---|---|
| Starting price | Starter $29/month (monthly only, 200 credits); Lite $129/month | Pro $139.95/month (about $117/month billed yearly) | Starter $49/month; Standard $99/month (about $39 and $79 billed yearly) |
| Keyword database | Ahrefs lists 2.7 billion US keywords | 28.8 billion keywords (Semrush, 2026) | Around 1.25 billion keywords (reported) |
| Backlink index | Ahrefs lists 35 trillion external backlink records | 43 trillion backlinks (Semrush, 2026) | Over 45 trillion links claimed (reported) |
| Free plan | Yes: Ahrefs Webmaster Tools for your own verified sites, plus free keyword generator | Free account with about 10 requests a day in many tools | Free account: MozBar, Domain Analysis and limited Keyword Explorer queries |
| Free trial | No | Yes, usually 7 days | Yes (reported as 7 or 30 days; check at sign-up) |
| Best for | Backlinks, competitor research, clean keyword data | All-in-one toolkit, keyword gap, content and local | Lowest paid entry, easy to learn, Domain Authority |
Prices checked 8 November 2026, in US dollars. Sources: Ahrefs help centre (Starter plan), Ryan Doser’s Ahrefs pricing breakdown (30 October 2026, Lite price and no free trial) and Ahrefs’ big data page; Backlinko (updated February 2026) and Ryze for Semrush prices, trial and free account, and the Semrush knowledge base for database size; Toolradar (October 2026) and BloggersIdeas (September 2026) for Moz prices, trial and database figures. Each company counts its database differently, so the size figures aren’t a like-for-like comparison.
All three tools bill in dollars on a card, so the rand cost moves with the exchange rate and your bank may add a foreign transaction fee. Work out the rand price before you subscribe, and set a calendar reminder for every renewal date.
Ahrefs: best for backlinks and competitor research
Ahrefs is my SEO tool of choice. I connect it to Claude, so I can pull keyword volumes, difficulty scores and competitor data straight into a chat while I plan content. Every keyword number in this lesson came from Ahrefs that way, and I’ll show you how to set it up in lesson 11.
Where Ahrefs shines for a beginner:
- Site Explorer. Type in any competitor and see their top pages, the keywords they rank for and every site linking to them. This is how you reverse-engineer what’s already working in your niche.
- Keywords Explorer. Volume, Keyword Difficulty (KD), traffic potential and the current top 10 for any keyword. KD is the score I lean on most when judging whether a new site can rank.
- Backlink data. When you get to link building in lessons 15 and 16, you’ll want to see who links to your competitors. Ahrefs is built around that.
The catch is price and limits. There’s no free trial. The $29 Starter plan gives you 200 credits a month, one month of history, up to 250 rows per report and no exports, according to the Ahrefs help centre. That’s enough to check a niche and a few dozen keywords, not to run a full content plan. Lite at $129 a month is where it becomes a daily working tool.
The upside is that Ahrefs Webmaster Tools gives you a lot for free on your own site, which I cover below.
Semrush: best for an all-in-one toolkit
Semrush does almost everything Ahrefs does and adds more around it: content writing helpers, local SEO, advertising research and social tools. If you like having everything under one login, it’s a strong choice.
Where Semrush shines for a beginner:
- The free trial. Semrush usually offers a 7-day free trial of its Pro plan, and some partner links extend it to 14 days. Used with a plan, that’s enough to research an entire niche, which is exactly what lesson 4 walks you through.
- Keyword Gap. Put in two or three competitors and see the keywords they rank for that you don’t. For a new site, that’s a ready-made content list.
- A useful free account. Backlinko reports about 10 requests a day in many tools, plus one project. Not enough for daily work, but handy for quick checks.
The downside is cost. At $139.95 a month, Pro is the most expensive starting point of the three, and Semrush has added newer bundles on top that cost more again. If you take the trial, decide before it ends whether you’ll really use it every week.
Moz: best for the cheapest paid entry
Moz Pro is the oldest of the three names and still the gentlest to learn. Its Domain Authority (DA) score is so widely used that you’ll see it quoted by guest post sellers and website brokers, so it’s worth understanding even if you never pay for Moz.
Where Moz shines for a beginner:
- Price. Starter at $49 a month is the cheapest paid plan here after Ahrefs’ limited Starter, and Standard at $99 is still below Semrush Pro.
- Simplicity. Fewer menus and a cleaner interface, which matters when you’re learning what the metrics mean.
- Free tools. The MozBar browser extension shows DA on any page as you browse Google, and a free account gives you a limited number of Keyword Explorer queries.
The trade-off is data depth. BloggersIdeas reports Moz’s keyword database at around 1.25 billion keywords, well short of the figures Ahrefs and Semrush publish. For a big, competitive niche that gap shows. For checking a handful of low-competition keywords, it matters less.
One note on the trial: recent reviews disagree on its length. Toolradar (October 2026) says 30 days, while BloggersIdeas (September 2026) says 7 days with a card required. Check the length on the sign-up page and set your cancel reminder from that.
Free alternatives to Ahrefs, Semrush and Moz
“free seo tools” gets 9,500 US searches a month and “ahrefs alternatives” gets 6,500, so plenty of people are hunting for a way around the subscription. The good news is that a stack of free tools covers most of what a beginner needs.
Google Search Console
Google Search Console is the one free tool every site owner needs. It shows the real searches your pages appear for, your clicks, impressions and average position, and any indexing problems. It’s Google’s own data about your site, so no paid tool can replace it. The limit is that it only shows your own site, not competitors.
Ahrefs Webmaster Tools (Ahrefs Free)
Ahrefs Webmaster Tools, now branded Ahrefs Free, gives you Site Audit, Site Explorer and Web Analytics for any number of sites you can verify you own. Ahrefs’ page lists Site Audit checks for 170+ technical and on-page issues with 5,000 crawl credits per project per month, and Site Explorer showing up to 1,000 of your backlinks and 1,000 of your keywords. Like Search Console, it only works on verified sites, but it shows your backlinks and keyword rankings in a way Search Console doesn’t.
Ahrefs free keyword generator
The Ahrefs keyword generator gives you keyword ideas for any seed term with monthly search volume and Keyword Difficulty, for Google, Bing, YouTube and Amazon. It’s the closest free thing to Keywords Explorer, and a quick way to get a first read on a topic.
Google Keyword Planner
Google Keyword Planner lives inside Google Ads and is free to use with an Ads account. It was built for advertisers, so the volumes are often shown as broad ranges unless you’re spending on ads, but it’s still useful for keyword ideas and for seeing what advertisers bid on a term.
Google Trends
Google Trends doesn’t give you search volume, but it shows whether interest is rising, flat or falling over five years. That’s the demand check from lesson 1, and it’s the same check that matters for the AI and SaaS sub-niches in lesson 2.
Semrush and Moz free accounts
Sign up for both. The Semrush free account gives you a small daily allowance of searches across many tools, and a free Moz account gives you MozBar and a few Keyword Explorer queries. Use them for spot checks when you don’t want to burn paid credits.
| Free tool | What it replaces | Main limit |
|---|---|---|
| Google Search Console | Rank tracking and keyword data for your own site | Your site only |
| Ahrefs Webmaster Tools | Site audit, your backlinks and your rankings | Verified sites only |
| Ahrefs keyword generator | Keyword ideas with volume and KD | No competitor research |
| Google Keyword Planner | Keyword ideas and advertiser bids | Volumes often shown as ranges |
| Google Trends | Demand direction over time | No exact search volume |
| Semrush and Moz free accounts | Quick keyword and domain checks | Small daily or monthly allowances |
The one thing free tools can’t do well is show you a competitor’s full keyword list and backlinks. That’s the job you save for a free trial or a paid month.
Which tool at which stage
The right answer to “Ahrefs vs Semrush vs Moz” depends on where you are. This is the order I’d follow if I were starting a new site today.
| Stage | What you need | What to use |
|---|---|---|
| 1. Testing niches (lessons 1 to 4) | Volume, KD and competitor checks for 3 niches | Free tools, then one free trial (Semrush or Moz) or one month of Ahrefs Starter |
| 2. Site live, first 20 to 30 posts | Keyword ideas and checking what you rank for | Search Console, Ahrefs Webmaster Tools, Ahrefs keyword generator |
| 3. Publishing weekly or earning | Competitor keywords, content gaps, backlinks | One paid tool: Ahrefs Lite or Semrush Pro, connected to Claude (lesson 11) |
| 4. Building links (lessons 15 and 16) | Competitor backlinks and vetting link sellers | Your paid tool (Ahrefs is my pick here), plus MozBar for quick DA checks |
Notice that paying every month only starts at stage 3. Before that, a well-planned free trial does the heavy lifting, and lesson 4 shows you exactly how to run one so you get a month of keyword research before you pay a cent.
If SEO tools interest you as a career rather than just for your own site, my guide to getting into SEO in South Africa covers the skills employers look for. And you can see the full list of tools I use on my resources page.
- Open a free Google Search Console account and a free Ahrefs Webmaster Tools account. You’ll verify your site in both once it’s live in module 3.
- Run your top niche from lesson 1 through the free Ahrefs keyword generator and note 10 keywords with volume and KD.
- Pick your one paid tool for the lesson 4 trial sprint: Semrush, Moz or a month of Ahrefs Starter. Don’t sign up yet.
- Work out the rand cost of your chosen tool and put a renewal reminder in your calendar.
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How to use the free trials to do a month of keyword research before you pay a cent.
Previous← Best niches: AI and SaaSSummary: Ahrefs vs Semrush vs Moz for beginners
Ahrefs and Semrush are the two best all-round SEO tools, and Moz is the cheapest paid way in. Ahrefs is strongest on backlinks and competitor research and has a free plan for your own sites but no free trial. Semrush has the broadest toolkit and a free trial but the highest starting price. Moz is easy to learn with a smaller keyword database. Pay for one tool, not three, and only once you’re publishing regularly. Until then, Google Search Console, Ahrefs Webmaster Tools, the Ahrefs keyword generator, Keyword Planner, Google Trends and the Semrush and Moz free accounts cover the basics. Next, in lesson 4, you’ll use a free trial to research a whole niche before you pay.
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Frequently asked questions
Is Semrush or Ahrefs better for beginners?
Both are excellent, so pick the one that fits how you’ll start. Semrush has a free trial and the broadest all-in-one toolkit, which makes it easy to test before you pay. Ahrefs has no free trial but offers a $29 Starter plan and a free plan for your own verified sites, and it’s stronger for backlink and competitor research. Learn one properly rather than paying for both.
Is Moz as good as Ahrefs?
Moz Pro is cheaper and easier to learn, but its keyword database is much smaller than the figures Ahrefs and Semrush publish, so it shows fewer keyword ideas in big niches. For checking a handful of low-competition keywords it does the job. For deep competitor and backlink research, Ahrefs is the stronger tool.
What is the best free alternative to Ahrefs?
For your own site, Ahrefs Webmaster Tools is the best free alternative, because it’s Ahrefs itself: site audits, your backlinks and your keyword rankings for any site you verify. Pair it with Google Search Console for Google’s own data and the free Ahrefs keyword generator for keyword ideas with volume and difficulty.
Does Ahrefs have a free trial?
No. As of November 2026 Ahrefs doesn’t offer a free trial. The cheapest way to try its paid data is the $29 a month Starter plan, which is billed monthly and limited to 200 credits. Its free plan, Ahrefs Webmaster Tools, works on sites you can verify you own.
Is Ahrefs Webmaster Tools really free?
Yes. Ahrefs Webmaster Tools, now branded Ahrefs Free, gives you Site Audit, Site Explorer and Web Analytics at no cost for any number of websites you verify you own. You can’t use it to research competitors’ sites, which needs a paid plan.
Do I need a paid SEO tool to start a website?
No. You can choose a niche, find your first keywords and launch a site with free tools like Google Search Console, Ahrefs Webmaster Tools, the Ahrefs keyword generator, Google Keyword Planner and Google Trends, plus one free trial. A paid tool starts paying for itself once you publish regularly and want competitor and backlink data.
Which SEO tool does Eugene use?
I use Ahrefs as my SEO tool of choice and connect it to Claude, so I can pull keyword volumes, difficulty and competitor data into a chat while I plan and write content. Lesson 11 of this course shows you how to connect Ahrefs or Semrush to Claude.
About Eugene Madondo
Eugene is a Cape Town-based SEO specialist and digital entrepreneur who has been earning online since 2012. He has worked in SEO at a tech startup, an agency and in-house tech roles, ran a consulting business, and has generated over $1.4 million from his own affiliate websites since 2020. He teaches website operators through Rank to Earn.
Back to the free website course overview, or see the tools I use on my resources page.