Its interesting that you overlooked Ahrefs site audit tool. Unlike SEMRush which limits you to 20,000 URLs, Ahrefs can crawl very large websites. Their data explorer is by far the best in the business. SEMRush gives you a list of URLs with issues they want to identify. But no option to customize. Ahrefs, much easier to use and powerful Data Explorer are very powerful indeed.
Pros: SEMrush offers insight into all things digital. In my experience with a few similar tools, SEMrush is the most comprehensive and easiest to use. It offers insights, reporting, tracking and planning for our clients' digital programs. We can even gain tons of insights into prospects' current digital marketing initiatives which helps close leads. It integrates with numerous other tools and is definitely a tool that will be the leader for at least the next few years.
Pros: I love the fact that SEMrush solves so many digital marketing problems for me. I can accomplish all my initial project marketing goals with the help of SEMrush and the information it gives me. I can spy on competitor's marketing strategies and easily track keywords. Marketing audits are extremely easy to complete and the reports are super informative. Creating effective links and effective content is crucial for all marketers, and this tool will help you accomplish that.
Under “Top Organic Keywords” section when you click full report, you are allowed to checkout only first 10 results. It helps me understand which keyword is sending maximum traffic to my competitor’s website. I analyse the keyword for its competitiveness if in case I want to target it. Alternatively, using it as a seed keyword, I perform keyword research through Long Tail Pro.

Many websites rely on other traffic generation methods such as traffic from social media, email, referrals, and direct traffic sources over search engines. For sites like these, SEO errors aren’t as important because search engines aren’t their #1 traffic source. For a smaller website, a couple of errors can have a much bigger negative effect than those same errors on a larger website.
Removing Cross Group Negative Keywords: Cross-group negative keywords are bound to happen when you use the modified or broad match feature in your campaigns. These terms cause ads to compete with each other, and your CPC will grow as a result. However, while it is time-consuming to remove cross group negative keywords the ‘cross group negatives’ button will save you a great deal of time. You will stay on budget as a result and avoid competing against your own ads.
Overall: SEMrush is a must have for anyone involved in search engine optimization as we are. The information handled is at our fingertips in seconds and can be passed on to clients or other members of the team efficiently and coherently. SEMrush is amazing for performing audits, the SiteAudit tool kit is extensive and can be adapted to fit each client in order to provide an on point and targeted campaign. The tools provided by SEMrush are invaluable and after using it I can't imagine running a successful campaign without it.
Another advantage of using Ahrefs is their “Fresh Index” “Live Index” switch that displays backlinks that Ahrefs’ crawler found. The main difference between the two is that the Live Index is updated every 15-30 minutes to show live links in your site. For Fresh Index, it is updated at a much longer timeframe, but it still displays dead links which give you the chance to reclaim or change the dead link.
Hi Andres, sad to know that you’ve not discovered few toxic links using SEMrush. How did you find those toxic links? Have you used any other tool to find them? Also you might want to get in touch with the SEMrush support team and let them know about this issue, so they’ll look into it. But if you still are not comfortable with it, you might want to give a try to Ahrefs for a month or two to really find out the best one among them. I’d suggest you give a try to Ahrefs for some time to see if it’s the right fit for you.

The thing that I liked the best about Ahrefs is that it contains a huge database of backlinks when I've checked my own website and my competitor's websites. This has allowed me to dig deeper and find out their exact linkbuilding and SEO strategies. Ahref contains a lot of tools and features that will make the life of an SEO professional or webmaster who wants more search engine traffic a lot easier. One of these features is the batch analysis feature. Basically, instead of entering your competitor's backlinks one at a time you could actually enter it once. This allows you to quickly check on the SEO metrics for a lot of competitor URLs in just one click.
Many websites rely on other traffic generation methods such as traffic from social media, email, referrals, and direct traffic sources over search engines. For sites like these, SEO errors aren’t as important because search engines aren’t their #1 traffic source. For a smaller website, a couple of errors can have a much bigger negative effect than those same errors on a larger website. 

Ahrefs is a well-known tool primarily used for checking backlinks, but what most SEOs forget to take into consideration is that it is capable of so much more. With their massive data index, Ahrefs is definitely one of the most sought-after SaaS tools out in the market. Tools such as this helped eradicate the days wherein Google gets played by unethical, black hat SEO tactics.  They helped the industry turn for the better, and SEO has never been simpler. With the tools such as Ahrefs being available in the market, it became simple for us to get better at what we do.
Removing Cross Group Negative Keywords: Cross-group negative keywords are bound to happen when you use the modified or broad match feature in your campaigns. These terms cause ads to compete with each other, and your CPC will grow as a result. However, while it is time-consuming to remove cross group negative keywords the ‘cross group negatives’ button will save you a great deal of time. You will stay on budget as a result and avoid competing against your own ads.
Pros: SEMRush is a full-fledged powerhouse for SEO building strategy and SEO audits. It's pretty beefy, so I would only recommend it if you have the time and patience for SEO, as the software gives a ton of outlets in looking up actionable items for your SEO Strategy. The first thing that I really liked with SEMRush was the initial SEO audit of my site -- I was able to see what's good and what's bad about my SEO, and the quick errors or warnings for title headers and ideas for gaining more traffic was awesome. Moving on, I found their analytics just as good as Google Analytics, showing me where my traffic is coming from and where I can improve my paid search positions. I haven't used the Social or Content aspects of SEMRush but social listening looks to be baked in well and integrated nicely. If you're in the market for seeing how your organic and paid search traffic plays a part, and then strategizing in how to improve your overall position against organic search and then your competitors, I'd recommend SEMRush.
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