I have a small agency and I am currently hosting only a handful of websites. I have not used any SEO services in the past and I decided that in order to move to the next level, I needed to do some research and invest in some tools to be able to provide my clients with proper SEO services.

What I discovered on the open market while researching is that SEO tools are expensive!
It is hard to find the right tool that can offer a good balance of features and cost.
I am so thankful that I discovered Appsumo and some of the great LTD's available for SEO. It seems that there is some fierce competition for the number one spot. Here is what ultimately led me to make my decision for Ranktracker.

Since I usually set up new sites for new customers, I am looking for a tool that I can use for client acquisition. I need Something that will let me research keywords, walk me through setting up a good SEO strategy and then monitoring the site for a while.
Rank Tracker offers this process on unlimited domains unlike other tools which is a plus.
It also offers unlimited users which will allow me to work with clients and invite them to a dashboard to view the progress.

The SEO checklist tool literally walks you through setting up a site properly. After site launch, I can use the SEO audit tool to review and analyze the site for optimum performance. Ranktracker has a reporting feature that allows me to generate branded reports and email to a customer on a regular basis. All of these features will provide a much needed professional boost for my website business. If you do nothing else, be sure to visit their website and read their SEO guide manual. This is better than some paid SEO courses that I have taken!

As many have already mentioned, the keyword offering is low by comparison to others and they go a lot quicker when you add all of the monitored sources. However, the developer has a plan for adding additional monthly keywords, allowing me to expand as needed affordably. There is talk of adding the feature to change the tracking frequency to weeks or months which would really help the situation. I hope this feature gets added soon. I am happy with my investment so far, and I plan to stack a few more codes before the deal ends.