I have paid real money for all three of these tools. Not a trial, not a free plan borrowed from a friend, actual invoices sitting in my email. Semrush for the longest stretch, Ahrefs for about fourteen months, and Moz for a year while I was doing local SEO work for a chain of clinics.
So this is not a feature table copied from three pricing pages. This is what it felt like to open each one on a Monday morning with work to do.
The short version
| Semrush | Ahrefs | Moz Pro | |
|---|---|---|---|
| Best at | Keyword research, competitor gaps, all round work | Backlink data and clean reporting | Local SEO and beginner friendly metrics |
| Entry price | $139.95 | $129 | $99 |
| Free trial | Yes, 7 days, often 14 through a partner link | No real trial, a paid starter tier instead | Yes, 30 days |
| Learning curve | Steep, lots of menus | Gentle, fewer tools done well | Easiest of the three |
| Weak spot | Crowded interface | No free trial, thinner keyword ideas | Smaller index, slower updates |
Keyword research: Semrush wins, and it is not close
The test I ran was simple. I took one topic I was writing about, coffee grinders, and put the same seed word into all three.
Semrush handed me about four times more usable long tail ideas than Moz, and noticeably more than Ahrefs, along with intent labels that told me whether a searcher wanted to buy or just learn. The filters are the real advantage. I can ask for questions only, difficulty under 30, volume over 100, in one country, and be left with a list I can write from that afternoon.
Ahrefs gives you good data with a cleaner face. For a beginner it is less overwhelming. But when I need volume of ideas rather than beauty, I open Semrush.
Moz was the weakest here. The ideas were fine, the volumes were ranges rather than numbers, and I always ended up wanting a second opinion.
Backlinks: Ahrefs still has the edge
I am going to be fair even though this page links to Semrush. Ahrefs built its name on backlink crawling and it shows. When I checked the same competitor in both tools, Ahrefs found links a few days earlier and its filtering felt more precise.
Semrush has closed most of the gap. Its index is enormous now, and the backlink gap report, which shows sites linking to your competitors but not to you, is more useful to me day to day than raw index size. If your whole job is link building, Ahrefs is the sharper knife. If link building is one part of a bigger job, Semrush is enough and you get everything else with it.
Moz gives you Domain Authority, which the industry loves to quote, but its link index is smaller than both rivals.
Site audits: a real difference in daily use
I ran all three against a messy client site with about 4,000 pages. Semrush found the most issues and sorted them by seriousness, so I knew where to start. Ahrefs found a similar set and presented it more calmly. Moz found fewer and crawled slower.
The thing that kept me on Semrush here was the plain language. It does not just say a page has a problem, it explains why the problem matters and what to change. When I hand a report to a client who does not know SEO, that difference saves me an hour of explaining.
Local SEO: Moz earns its place
For the clinic chain I mentioned, Moz Local was genuinely good. Listing management across directories, review monitoring, and a dashboard that non technical staff could read without training.
Semrush has a local toolkit too, but it is an add on with its own cost. If local is the whole business, Moz is worth a serious look. If local is one service among many, paying twice does not make sense.
Price and what you get for it
Moz starts cheapest at $99 and gives you the smallest data set. Ahrefs sits at $129 with excellent backlink data but no proper free trial, which means you pay to find out whether you like it. Semrush starts at $139.95 and covers the widest ground, and it is the only one of the three where you can test the full paid product for free before deciding.
That last point decided things for me twice. Paying 129 dollars to audition a tool feels different to testing it for a week and then paying. I have written up the full breakdown in my Semrush pricing guide if you want the numbers with more context.
Try the one with a real trial first
Semrush is the only tool of the three that lets you use the complete paid product before you spend anything. Run your own site through it and compare with whatever you use today.
Start the free trial Takes about 60 seconds. Card needed to verify, no charge during the trial.Which one should you pick
Pick Semrush if
- You want one tool that covers keywords, audits, competitors, rank tracking and content
- You do client work and need reports other people can read
- You want to test a full product before paying
- Finding content ideas is your main bottleneck
Pick Ahrefs if
- Link building is the core of your work
- You prefer a simpler interface with fewer places to get lost
- You are happy to pay before you test
Pick Moz if
- Local SEO and listings are the job
- Budget is the deciding factor
- You or your team are new to SEO and want something calm to learn on
What I run today
Semrush, with an Ahrefs subscription that I switch on for two months whenever a link heavy project lands. That combination costs more than one tool, so I only do it when a client is paying for the work.
If I could keep only one, it would be Semrush, for one unglamorous reason. It is the tool I open without thinking on a normal Tuesday when I need to decide what to write next. The others are better at one thing each. This one is good at the thing I do every day.
If you are still unsure whether the free version is enough to judge it, I compare the free account and the trial properly in this guide on whether Semrush is free.