Amazing tool and amazing customer support. This software allows our agency to track website changes for our clients. It also pulls data from Google Search Console and Google Analytics which gives us additional insight into our campaign. The auditing features are great as well. They provide actionable insights with guides explaining exactly what to do.
ContentKing gives us a holistic view of our site health and where we can make improvements.
Still figuring out some of the alert settings and making sure that changes aren’t being tracked as errors, but overall we haven’t discovered any real cons!
I love its simplicity. The ability to go back and see the change in a site’s performance and different metrics is great. A real value added for our customers.
We are using ContentKing in our SEO department. It keeps us well informed of anything updated on our client’s website, sending us notifications of crucial things that might have been changed on the website or may have been lost for technical reason.
If you are doing SEO to a complex website that is run by a large complex company that always keep track of the changes they make onsite than this tool is perfect for you.
Our SEO team loves this tool. It is easy to use and works great with slack and our internal project management workflows. If you manage multiple sites and have critical ranking pages that need monitoring and on the fly auditing, get this tool on your toolkit.
Monitoring SEO impacting changes on real-time for all websites has never been easier. As an agency this has been an issue specially when you’re managing over 50 clients - team implements a change, new site is launched, broken links go un-noticed unless re-audited. Our SEO team benefits the most from getting real time notifications from broken links, H1 changes and so much more. SEO Managers are proactive and on-top of their game due to this tool. The Auditing tool is easy for an entry-level SEO or web developer to understand and make sense out of data.
Finds issues before they become problems. I needed a way to monitor multiple websites and monitor and track changes being made to each website and prevent certain changes (made by clients) before they negatively affect website rankings.
Amazing customer service and support. Vojtech went above and beyond to ensure my experience was great!
We are currently using ContentKing for real-time monitoring of our sites (medium size sites). It comes very handy when you don’t want to spend time crawling your sites every week to detect any issues. With that tool, you will be aware of any changes your dev team made, as well as your content teams. If your dev team added a no-index tag by mistake, you will instantly be notified. It also notifies us from server issues that we usually can’t track with regular crawling tools. The difference with regular crawling tool is that ContentKing offers real time monitoring and HTTP header snapshots. You can also have issue tracking and history per URLs.
They respond very quickly and have deep technical knowledge so they will always find a solution to your problem.
ContentKing is well suited if your are managing different blogs or ecommerce stores and you need to keep an eye on any changes made. Good pricing structure based on the number of pages you have. You will be sure that you’re monitoring your sites effectively and staying on top of problems before they occur.
We use ContentKing for real time monitoring and auditing. It gives various teams within the business the ability to review and work on different aspects of the site – whilst monitoring the impact together.
I use Contentking as a specific tool for audits and keeping track of changes. The latter was how I was looking for software and found out about ContentKing. I did not know at that time they were also very good in reporting or using it as an audit tool.
They say in their chat they have a reaction time of some hours, but I always had a reaction within 10 minutes and also a very complete answer, they went the extra mile. It’s just almost hard to believe they have a support level this high. It’s not what we’re used to anymore.
We are using ContentKing in our SEO department to track our clients’ websites. For us, one of the main problems is the interaction with dev/analytical departments and managers on the client side. Sometimes it is very difficult to find that changes made by another team have affected important website features that play a big role in SEO. With ContentKing we can identify changes quickly. In addition, ContentKing has helped to detect server issues just in time.
ContentKing is well suited for any SEO agency’ common workflows, such as implementing new features on the websites, publishing new content, working with large outsourcing dev/marketing teams.
ContentKing support is one of the best I’ve ever worked with. It answers quickly, provides full information on your issue, and improves your setup in best way.
Structured view of all pages and their content. Real time notifications on whatever might be critical - H1 changes, title changes, etc. The fact that the app not just points you to precisely where the issue occurs, but the fact that it tells you how to fix it. Customer service - super responsive and helpful!
The site offers many tools and features that assist our growing sites. ContentKing offers a great deal to its consumers! I would highly recommend the site to any consumer working with SEO or related content. Their customer service exceeds expectations too.
ContentKing offers solutions to your problems. Take advantage of teaching tools on the site. Learn the ins and outs to take advantage of what the site has to offer.
Real time notifications of changes and issues that happen on your site is far superior to any other SEO product such as MOZ or Semrush. It is actually a fun product to work with for technical and SEO issues because when a notice is given or present when you fix the issue you see the error corrected and health of site improved. Other SEO products give you notices of errors but you don’t know if your fix or change has been done correctly until you submit them for real crawl.
Customer service is also 10 out of 10. Almost immediate response and extremely flexible with plans and options to ensure we have the best results and that the software is working at optimum for our needs.
Try and use this software if you work on technical issues or SEO issues with your site or have a lot of people touching your website. If you are an agent Content King is a no brainier and would greatly help manage a sites issues in real time.
Very thorough see-auditing + realtime monitoring:
I like that it monitors the changes that I am making in real-time as I make them. It gives me a score of what needs to be fixed. I like that it has a plugin for WordPress, a Chrome Extension, and a Saas application. This is the best software I have tested to monitor and recommend SEO technical changes.
The software works incredibly well for anyone doing SEO, it makes things easy to see and understand. Their customer service is even better than their already amazing software! Highly recommended. Everything they offer is extremely user friendly and easy to learn. You can see the pages of your website and any issues with them so that you can fix them easily, it even sends you email alerts in case there are any changes or issues with your website.
Don’t even hesitate, you won’t regret it.
There are several things I like about this tool. Firstly it is easy to understand, obviously a huge plus. Unlike all other tools of its kind, this one is actually proactive and not just reactive. Meaning, it continuously checks your sites for SEO and other related technical issues. So you do not have to remember to run it to keep on top of issues, which for us, is a VERY big plus.
Overall we are discovering issues faster and correcting them quicker.
The real-time alerts are undeniably the best feature for me and my business. They provide me with a ton of insight which is appreciated by my clients. I catch problems, find solutions and preempt issues from happening with ContentKing - it’s awesome.
Major problems are often avoided with ContentKing - I had a client who noindexed his entire site by accident which was found by ContentKing and pinged in my inbox - picking up deleted pages and redirecting them to consolidate equity is another huge value add. I also loved the alert on SSL certification almost expiring!
Start the trial - it’s 2 weeks long - you’ll get a lot of value - use the support if you need help or advice - the support is excellent!
The tool does a great job catching SEO-related issues quickly, and alerting us when one of our sites needs immediate attention.
ContentKing has allowed us to monitor a slew of websites for changes as we’re not always privy to content additions/subtractions/changes before they’re implemented.
Additionally, we leverage the tool as a quick content inventory that’s always up-to-date and includes a change history, which has been great!
We were looking for a product to monitor changes on our clients’ websites and most important, alert us when something bad happens, exactly when it happens.
The fact that Content King does not need “on demand” crawls and it’s a continuously monitoring tool made it our best choice and couldn’t be happier with the decision.
On top of that, cannot praise enough their support team, top notch gang! :)
I really enjoy the consistent monitoring of my sites and the alerts. I can rest easier at night knowing the system is monitoring all of the important factors on our sites. I also like that it can alert me to any changes a client might make that I don’t know about.
Great support as well. Fast response and a pleasure to work with.
I love the automatic monitoring and emails I receive from ContentKing to let me know the status of my websites. I have a small agency, but we do a lot of website migrations. The fast notifications when domain names are moved, or sites go live, or issues are picked up are very important to me to be able to offer my clients speedy service.
I also appreciate the kind and helpful support staff. There really is very little that I do not appreciate about this affordable service.
I highly recommend that you give ContentKing a try, and see all of the great ways it can help your agency or department become more effecient.
SEO Auditing has never been easier, with the King you get insightful and real-time data on how your websites are doing. It provides great insights into your pages and related SEO content, so you can monitor your overall website (and content) health. It’s properly designed and really easy to use and configure.
ContentKing is great to help you adjust your website SEO content to make pages adhere to better standards, and thus relate to better SEO results overall. It also provides great insights into the technical working of your websites, like http status info and simple things like sitemap and robots.txt files. The tool also provides reasons as to why certain checks are the way there are, through the ContentKing Academy, so you might even learn some extra things along the way. And if a certain check is not something you want to follow up on, you can always let the app ignore certain issues.
If you’re looking for a advanced monitoring system (among other features but this one is the most prominent) that’s easy to implement (click of a button) which requires nothing other than the domain name you should definitely look up ContentKing.
What I like the most about ContentKing is the alerts system. Unlike tools like Uptimerobot (or similar ones) you get more than just “Website is down”. You get a detailed explanation of important changes whether the website is down, canonicals gets changed, headers changed etc. With ContentKing we’re able to be proactive towards our clients rather than reactive.
As an agency we deal with a lot of clients, being able to stay up-to-date on the changes their making without spending a lot of time every week on looking it up is immensely helpful. Because of this we’re also able to be proactive towards our clients when major issues arise instead of noticing it weeks later.
ContentKing’s configurable alert system can notify us when things change on a site and we don’t have to find out about it after rankings have tanked. I can fully recommend it.
ContentKing is fantastic for monitoring website stability and onpage changes. If you have “a lot of cooks in the kitchen” working on your website, it’s a must-have in order to ensure that you don’t get any nasty surprises in your SEO from someone changing something they shouldn’t have.
I successfully used ContentKing to diagnose a Kubernetes architecture issue with one client. Pages from a lower environment (including the meta robots noindex) were being intermittently shown in production, and ContentKing was able to provide us the data to show that “hey, you’re noindexing your website for about 5 minutes at a time, intermittently, throughout the day.” It, of course, saved the client’s SEO and it went a long way with maintaining our relationship with them.
Lastly, CK’s customer service is great. Everyone is fantastic and responsive, and they will go out of their way to help you solve a problem.
Unlike other crawlers, ContentKing is constantly scouring my websites, letting me know when there are issues that I may not have otherwise caught for a while. It’s an invaluable tool for any SEO with large sites.
ContentKing allows us to resolve SEO related issues post-release. We’ve been able to catch certain issues before they’ve been live for too long. It also gives us peace of mind.
I don’t really have a dislike for the tool. It “does what it says on the tin”.
Contentking is very easy and intuitive to setup. Excellent UI as well.
The largest benefit for us is to be able to compare two dates to see everything that has changed on the site.
ContentKing has the ability to tell you what has changed on a site between different comparison dates. Its API, Data Studio connector and ability to extract and monitor custom elements makes the tool an essential part of our SEO tool stack
The largest benefit for us is to be able to compare two dates to see everything that has changed on the site.
Connecting all necessary resources (Search Console, Analytics) combined with their own powerfull crawler, Contentking gives you near realtime feedback of your improvements. Collecting maximum points is very satisfying.
Content is king. Having control over your content, platform performance and mistakes is crucial. Together with ContentKing, our linkbuilding went successful.
Ease of constant updates across several websites. We improved SEO of several websites very easily. Support is also very good and quick. Make use of the trial, you’ll find out how useful it is for your company.
We monitor our site on a daily basis. CK regularly highlights issues our dev team didn’t know we had. The UI/UX is more enjoyable to use, and often more insightful, than competitive tools.
Wonderful real-time alerts and dashboard. I’m super satisfied!
My overall experience has been fantastic. The team is extremely communicative and wants to ensure our success with the software. I love it!
It is so easy to set up, and customization is extremely simple. Everything you want it to do, it does, without having to figure anything out considering how straight-forward and simple it is to use.
The main thing I love about ContentKing is that I feel like we are on top of any potential issues when monitoring a website. The ease of seeing content in tags, links, and relationships of pages is just fantastic.
If you need to monitor multiple websites and most importantly changes to websites that can negatively affect rankings then ContentKing is awesome. If a developer suddenly changes pages / menu / links on a website it can massively effect rankings – I no longer have this worry.
Customers and our team get instant feedback on seo relevant settings. ContentKing is thorough and goes deeper than many other tools.
Instead of crawling your site when you expect something isn’t good, you have directly fresh data because of the 24/7 crawling/monitoring. Huge.
ContentKing has saved us many times a lot of headaches, with no/indexing parts of the site, finding redirect errors, etc. Too much to name, saved us a lot of headaches! And helps you find proof how crawlers see your site. Less discussions with development.
The online customer service is very friendly and helpful.
ContentKing have helped our SEO team to be much more time effective. In a short time ContentKing has become part of our daily work, and I can not believe how manually we worked with these areas before.
After the initial set up, ContentKing is great at automating tedious tasks and also following up the progress on a lot of separate projects. I’m especially pleased with how quickly updates are incorporated.
The way the SEO data are displayed is very modern and useful. As well the crawling speed is very high and you can define it in the settings, e.g. slow down during the day and speed up during the night. All notifications sent by CK are accurate and what is the most important, they are not overwhelming nor redundant.
This tool helps to improve the website SEO and finds issues before they become a problem. It monitors real time our complete website for changes that have a potential to hurt it SEO wise. Some of the errors ContentKing found also affected the visitors of our website, so it also helped to give an improved visitor experience. Another pro is the great support team. So, a must have tool!
First of all the product is very clear and user friendly.
When you use the product for the first time it gives you a lot of improvement tips. Very clear suggestions and tips how to fix them.
But the best part is the monitoring part of the tool. It checks 24 hours / 7 days a week our website. So when we make a mistake, we know Contentking is going to find it and tell us about it.
Not only for SEO purposes but also for user friendliness. For example when there is a broken link.
Email alerts have taken away the need for any SEO and development worries. If something changes, ContentKing makes sure I know about it.
I am able to monitor changes that in-house people may make and not tell me about. This allows me to intervene should there be any pending SEO disasters before they happen.
Love the real time change tracking. It makes it so easy to ensure that our development team don’t have any inadvertent adverse impact on our search visibility. UX is fantastic too – shout out to whoever is responsible for that! The support team are also excellent and respond quickly, very impressed.
ContentKing gives me a firm grip on my SEO and what works. Since I don’t have time to shell out best practices from long-form contents that are more self-served than customer-focused, I love to just get the right information when I need it.
If you’re doing on-going SEO, ContentKing is a must-have.
I have been using Yoast SEO as a WordPress plugin for years. And before I thought this was enough to keep your website optimal SEO friendly. However, ContentKing helps me with optimizing my website even further. On the technical, content and structure site of the website. But, I am no developer. So very technical stuff are not for me. But, ContentKing presents the improvements on a very easy and clear way.
The most I love is that you have a clear overview about the health of your websites. Beside this you can see what you have to fix to make your site better. They explain you what you have to and how you can do it. If you don’t know very much about SEO, this is a good way to start learning.
– Clear issue dashboard combined with a clear explanation what to do to fix it
– When there happens something strange regarding a drastic seo impact you receive an email alert
– A good tool is nice, but worthless when there is no good support to back it up. The last is most likely the biggest strength: the people behind CK!
We like automatic reports and gamification of reaching the high result of each website. Great support team.
– Alert system for sudden problems with URLs and others important on-page SEO parameters is a huge benefit for big e-commerces.
– Possibility to see and check history of changes on the page level whenever we need.
– Automatic reports, overviews and filtering options are saving us a lot of time.
– App is also very easy to use and has a clear UX.
The 24/7 online analysis feature is very useful! It saves a lot of time for me and colleagues, because it saves us from having to manually create certain types of analysis (e.g. broken links, duplicates, etc.).
Ease of use. It is very straightforward and this makes it super easy to use for regular website and blog owners. You don’t need to be an SEO Guru to be able to manage and improve your SEO on your site. Audits are run on your sites and you are notified of all possible SEO issues and you are able to sort them by priority as well as ignore those that you do not need to focus on or fix. Each suggestion is clickable and you can go right to the page or post on your site to fix what you need to fix.
I test-drove more than 5 other SEO Tools this spring and Content King is by far the most user friendly and it does everything I want it to do. It also has the best customer service I’ve come across out of the tools I’ve tried.
Real-time monitoring of the website and keeping track of historical changes. The to do list is very easy to use and actionable. A big advantage compared to other SEO tools. The support is great, ContentKing listen to their users, for example new features.
We run a SEO, PPC and Analytics agency and we rely on ContentKing to monitor our client websites and alert us to performance issues. Before ContentKing we would manually check websites periodically and often miss errors introduced by client developers that would cause a direct impact on a clients bottom line. ContentKing has been invaluable here and is at a price point that is affordable for an agency to absorb as a direct cost. I highly recommend it.
Unlike many other tools, it requires far less configuration – configure and ignore, this means that I don’t have to schedule crawls etc.. and it feels like its continuously finding issues.
I like the alerts that I receive when something got wrong and the daily audit that it does in my website.
ContentKing collects the right points for attention, presents them beautifully and thus assures our customers of a better SEO result.
I think it’s ability to detect technical issues promptly which can save you hours of time, trying to diagnose SEO problems. I also love the interface, it’s a lot more user-friendly than a lot of the other SEO auditing tools on the market.
The best feature is the alerts. You get mails from contentking when someone has changed something on a website. For us as an agency this is really helpfull.
This tool is very easy to use and gives a full and clear overview of current SEO status of the website. Next to that I get on page level a clear guidance where and what to improve.
Our clients rely on us to optimize their websites and boost traffic and conversion. Our work is never finished, which means we need tools that never stop looking. One of the biggest advantages of ContentKing is that it supports us in every step of our process. New clients often think they need a complete rebuild of their website. ContentKing helps us determine whether that is actually necessary and, if so, why it is necessary. And once we’ve built the new website, it keeps track of a wide range of important on-site metrics that might slip through the cracks otherwise.
This tool has the ability to find SEO problems before they actually become a problem. It monitors complete websites for changes that have a potential to break it SEO wise. Its a must have tool!
It saves me so much time. It also alerts me when issues appear, so we can make sure to fix everything before we see ranking drops. The ContentKing team is also updating this tool on a regular basis, making it better every time.
+ An innovative platform that proactively monitors all your sites 24/7, ContentKing turns hours of analysis into minutes, as well as alerting you within minutes of changes occurring on the site.
+ The tracked changes feature highlights exactly what’s different, allowing you to quickly prevent an over-enthusiastic client or developer from undermining your SEO efforts.
+ Also one of the only services on the market with scalable pricing based on your exact usage (in pages), rather than having to fit your requirements into a predefined package, as is the case with most SaaS providers.
Lets see all the problems of my sites easily and quickly. Contenking does the work for me, I just have to correct the mistakes. It has become a tool that is mainly used when creating a site or a redesign
Content King gives you unique historical data by tracking the changes on a website. Usability and customer support are great. The company listens to the needs of their customers.
This software provides quick access to important SEO data of a website, especially regarding on-page indexability issues. Its user experience is a major asset, as it allows you to work very easily with a client or a web agency. Finally, the historical change tracking information is very useful.
Customer support is fast and hassle-free. There is always the possibility to ask anything, which is the wise advantage of this application.
As a former long-time Moz user, I’ve been very happy with the switch over to ContentKing. The comprehensive view of what’s going on with my clients’ site coupled with the ability to get dig down into the details is awesome! I’m also a huge fan of the change history, tracking every change that happens on ever page of your site. I’m not aware of any other tool that does this.
My favorite aspect of Content King is the customer service and user experience. You can tell they really invested in these two pillars.
+ The service. When I first started, the chat box actually had a human that was operating it and they didn’t just point me to their not-so-helpful support page (like everyone else).
+ Seeing Updated Pages – As an agency I thought, ok so it crawls the pages more than once a month, big deal. Then I realized it gave me an opportunity to show clients changes by tracking those especially for moments when the CMS doesn’t show the changes you made.
+ Pretty awesome they just integrated with GSC.
Having live updates is key here – often time SEO teams will only be crawling their sites once per month with tools like screaming frog (which is fine I guess) but where ContentKing really smashes it out of the park is with live updates. It automatically tells if something has gone wrong, and if you’re doing crawls only on the last day of the month, you may not have noticed for weeks!
Its reports are very complete and you can customize them to better fit your needs by ignoring some issues (which are not truly important). Also, every time I had the slightest issue and I had contacted the customer support, there were very patient and nice to help me understand what was going on or how could I achieve what I wanted to do. From a UX point of view, the interface is very user-friendly and nice to use. You have a general overview of your website’s situation and then you can dig deeper into what matters to you. What I also like is that they keep a history of what has happened on the pages so that you can go back in time and assess the improvements made on a specific page or understand when and why a page started to derail.
ContentKing is an awesome product. The micro/macro view help me very well each day. We can see problems, but also how many pages are affected. By the way, the monitoring part is the core of this seo tool that help me to understand which thing was modified.
ContentKing is a great SEO tool, which is easy to use, realiable and great support. Also your client can get access to work together and you get daily monitoring. In all a great tool for a good price.
Always provides actual benefit and real world best practice seo advice. The interface and presentation feels natural and is easy to use.
I really like the alerts you get. For many clients in my portfolio I get alerts of SEO issues; broken links, problems with robots.txt files or sitemap problems. ContentKing helps me to alert my clients quicker than ever. And it’s saves me time!
It saves me so much time, enabling me to get generally more efficient at my job. Further to that it protects my websites by ensuring I am informed with any major changes.
- Easy to use and all elements are explained in simple wordings
- Fast customer service and helpful expert feedback
- Alert system which keeps it manageable to react on issues and bugs on detail level
- Tracked changed on page level can be checked at all times
I receive alerts when there are issues with my website. Also the customer support is really great for an organization with so many clients.
This tool get’s the current state of your website from an external point of view. Marketing can monitor and edit while tech can see what points needs attention.
The tool gives me live updates about changes on a website which is very helpful when you work with many clients at an agency.
When you work with big websites (10.000 plus pages) it’s very helpful you don’t have to crawl a websites yourself but you just have to log in to access your websites data.
Content king makes it nearly impossible to screw something up, pretty much everything is monitored and reported. Great way to stay in control of things and make sure that every action is beneficial to your website.
Love ContentKing and the fact that I know it is always up to date. I don’t have to schedule crawls or reports, I just log in and get the latest issues and action items and go on my way. With the record keeping/change tracking, it provides a level of clarity that others tools can not.
It gives me the information I need out of the box. It gives me visibility on the SEO and overall health of our website. It provides immediate actionable insights. It gives me a peace of mind that our growing website is monitored with the deep expertise from ContentKing.
I love the interface! And I like that the ContentKing team keeps introducing new valuable features all the time. I love the new Google Analytics integration – very useful!
That we can see the most important things at glance. We have lots of user-generated content as on our site, so there are lots of parts that could break. The email summary and robot.txt check is also very nice – in just a few seconds we know that we can sleep well.
1) Website Overview: With Content King I can see the whole picture of a website: How the URLs are laid out, the health score of each page, and any problems/issues they may have (including broken links or pages that can’t be indexed).
2) Track Changes: What truly sets Content King apart from any other scanning tool I’ve used is: Content King tracks changes. It’s not a one-off scan, or merely a recurring scan. Content King keeps a running list of the changes for each page. If you’re in the businesses of monitoring client websites and providing maintenance, this is a game changer.
Example: Content King notified me that several pages had gone “”missing”” on one of my client’s sites. Turns out, they were consolidating several pages into one new page. However, they hadn’t setup any 301 redirects to let Google know they weren’t merely removed. Thanks to Content King, I was aware of the change and was able to advise my client accordingly.
3) Easy to Use: Content King has a wonderfully designed user interface. Feels fresh and new.
4) Website Migration: I haven’t had the opportunity to use Content King to monitor the success of a website migration yet, but I’m looking forward to that.
5) Notifications and Reports: Content King notifies me of any major issues that pop up on a website, and they also send a weekly summary/graph so I can see an overview of what’s going on with each of the websites I monitor.
6) Support: Very helpful and responsive support.
The fact that it touches on many different parts of the optimisation process. As an audit tool it has all the things a platform needs. But the real power lies underneath. It makes visible what for many stays hidden. It makes sense, it’s useful for the marketer, it creates clarity.
Super easy to use, great support. The price is very reasonable when compared to other tools in the market. I recommend ContentKing if you’re looking to be more productive and efficient in your SEO audits and optimization work. It saves a lot of time and effort – and I already told that it’s so easy to use?
I’d recommend Contentkings if you are looking for an easy way to scale site auditing. The tool does some really great and unique checks like finding out which pages are missing from the sitemap. I also loved the feature to find out missing (visual) analytics from pages.
Onsite SEO has always been inherently problematic in that it’s almost entirely reactive. You don’t typically notice issues until they’re already affecting your site. ContentKing tackles that issue, IMO, quite effectively: It monitors your site for changes in real time and alerts you as soon as anything bad happens.
Every SEO I know has experienced a situation where one small (usually inadvertent) change resulted in serious site issues. The accompanying panic and scramble to diagnose/fix aren’t fun. And that’s why I like ContentKing so much - it takes care of the little things so I don’t have to, and frees up my time to focus on the bigger picture.
Very nice tool for observing changes on their own pages, that is what developers changed at the last deploy and competition in reverse engineering what they do.
When you’re managing a large site, or even a series of them, it’s really exceptional. The alerts are great.
The killer feature is definitely the change tracking and alerts - no one else is doing it!
ContentKing is a no brainer if you want to make sure your websites runs flawlessly and without (SEO) flaws. You can have a good website, but without solid SEO your website will be good at best and not great. ContentKing can help you (your website) become great!