Best SEO Checker and Website Analyzer Tools Compared 2021

Could your business survive without 75% of its visitors? The answer to this question seems obvious. However, what if we tell you that you’re probably reaching only 25% of your potential customer base? It’s true. More than 80% of the online users don’t get to the second results page. So, if you didn’t manage to locate your site on the first page of Google, most people don’t even know you exist. From all of this, it’s clear that getting to the first page is what you should aim for. It’s not an easy task, as you already know. But with proper tools, anyone can do it. Now, we can’t help you with your patience. However, we know a thing or two about SEO and things that can make it easy. So, we present you with a list of the best SEO checker and website analyzer tools compared.

A person writing on a whiteboard.
The best SEO checker and website analyzer tools are there to help you reach your audience.

Why should you use SEO tools?

Think of SEO as well-oiled machinery. It has a lot of moving parts, and all of them need to be in perfect shape for it to work. But since there are so many of them, it can be hard to keep track of everything. The tools we’ll talk about today help you do just that.

When you use an SEO checker, you can see if your site is well optimized. On top of that, you’ll get suggestions for changes you can make to improve your on-page SEO. As a matter of fact, it’s an essential part of the marketer’s or webmaster’s arsenal. Here are some of the things these can help you with.

  • Fixing SEO errors that hold your site back
  • Making improvements for more traffic
  • Keeping track of other SEO strategies (such as backlink building)
  • Uncovering areas where you can gain rank

So, let’s take a look at some of the best examples of these and compare them to see who’s got the edge in 2021.


According to many, All in One SEO (AIOSEO) is the best tool out there. More than 2 million websites use it. So, it got something going for it, for sure. A good thing about it is that it’s very comprehensive. It’ll analyze your site from the bottom up and let you know what improvements you can make.

Although it’s comprehensive, it’s still beginner-friendly. And that’s always a great thing. It has a setup wizard that will walk you through every step along the way. You’ll choose all the best SEO settings for your site, and then you’ll get an SEO score. Of course, a detailed report of everything wrong goes with it.

You can expect it to tell you to add internal or external links, fix broken things, and add meta descriptions and tags. It takes care of all those little things that matter a lot. So, even if you’re new to the world of SEO, it’ll be the guide that you need.

If you follow through with all the changes it suggests, you’ll get very close to a perfect on-page SEO score. And that will easily get more traffic to your website. But if you want to dig even further, there’s also a competitor research feature.

When you put it all together, it’s clear why AIOSEO is one of the best SEO checker and website analyzer tools out there.

Two men looking at some of the best SEO checker and website analyzer tools.
AIOSEO is a tool that both beginners and pros can use and enjoy.


SEMRush is another strong tool that the market loves. WordPress blogs, SEO experts, and business owners all use it, and they have nothing but praise for it. And if you want to do some keyword research or tracking keyword rankings, there’s no better thing than it. But it can also analyze your website and do the SEO audit.

It’s great for tracking backlinks, as well. It’ll show you all the sites linking to yours, and it’ll list all the anchors they used, as well as their authority. So, if you want to see if your link-building efforts are paying off, look no further than SEMRush. On top of that, it’ll help you detect spammy backlinks before they can impact your site. And this feature alone can save you a lot of trouble in the long run.

They offer a 7-day free trial, so feel free to take advantage of it. If it gives you what you need, it makes sense to open up for one of their premium plans.


With more than 3 million websites as users, MonsterInsights must be a tool worth looking into. And indeed it is. It lets you easily set up Google Analytics in WordPress and see all the traffic data directly in your dashboard. And the same goes for your keyword rankings. Your Google Search Console will be accessible from your site, and you’ll be able to see anything you need to.

Besides all that, it shows you the number of impressions, clicks, click-through rate, and the average position of every keyword you rank for. So, it allows you to bring all your Google tools to your website and gives some useful insights. It’s great for that, but it works the best with a tool like AIOSEO alongside it. If you combine them, you’ll get results you couldn’t even hope for.

It’s worth mentioning that there’s a free version of MonsterInsights that you can download. So, there’s no reason why you shouldn’t use it, or at least try it.

A hand holding a pen pointing at Google analytics.
MonsterInsights will let you bring Google Analytics directly to your site.


Serpstat is an SEO platform that offers a wide range of different SEO tools. You can perform an in-depth website analysis with it, but you can do much more. Although feature-rich, it still manages to stay accessible and have a great user experience.

With it, you can do pretty much anything. Do an audit, check your traffic and performance, analyze backlinks, or check keyword ranks. You’ll get to see all the SEO issues present on your site and recommendations on how to fix them. You can also use it to compare your pages with competitors.

It’s a great all-around tool, and it will definitely help your site. There’s a free version, but the premium ones are among the cheapest on the list. So, if you’re looking for something to get started, Serpstat is a great choice as it still is one of the best SEO checker and website analyzer tools in 2021.


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