Cons: To an untrained eye, SEMrush can be a little overwhelming just because of the amount of data everywhere on the screen. It took me a whole week just to have some understanding of the program when I was first introduced to it. Even 2 years later..and I still find new things I didn't know before. So is it a con? Maybe not so much but to some it could be.

With Ahrefs, users get the best backlink checking platform in the industry. With just a few clicks of the button, users have a crystal clear profile of any website or URL. From links to anchors as well as the strength of the backlinks, Ahrefs reveals them all in an instant. Users can also monitor backlinks and follow their growth overtime and deploy smart filters and advanced reporting features to quickly discover relevant data.

We have done the comparison posts around these tools here and here Please go through both the review posts and go with the SEO tool which fulfil your needs. You can also try Free trial for these SEO tools. And go for the premium version of a SEO tool which you feel is best for you.
SEMRush boasts of a number of tools which are aimed at improving SEO and content marketing as a whole. The primary goal of these tools is to help users laser focus their efforts on what matters to drive the most targeted traffic which consequently improves conversions. That said getting to grips with these tools for a newbie can take some time but which is made easier thanks to SEMRush’s various blogs and tutorials.

Ahrefs boasts the best link database among any system out there. It does most everything -- link monitoring, alerts, calculated metrics, the richest clickstream blend out there, and much more. Its UI is cluttered in a good way and the company has quick and polite support. And Tim Soulo -- the public face of Ahrefs -- has done a ton of good for the SEO community.
It is also an excellent tool for anyone searching for relevant long-tail keywords that apply to their business. Long-tail keywords help to create more opportunities for ad campaigns, copy, content, and anchor text which boosts SERPs. All of the best keywords that you’re interested in targeting can be combined into one list for easy later reference that way you have all the required data on hand when needed.
Hi Anil, both are great SEO tools I would say because I’ve been using both of them for a long time now. SEMrush offers even more incredible features and their databases are even bigger and regularly get updated when compared to Ahrefs. But as you said, Ahrefs is equally good and I really like their keyword analysis data to be precise when compared to any other tool.
If you’ve gone through the whole post, we have clearly mentioned that we’re using SEMrush for a long time and also got a lot of better results with it (it means, we’re clearly mentioning that SEMrush can be a great choice for bloggers). But that being said, Ahrefs is not a bad tool either. In fact, both these tools have almost similar features with similar pricing plans. First, give a try to SEMrush with our free trial once and you’ll mostly end up using it.