ContentKing

Pros: Provides actionable insights on how to continuously improve the health and SEO posture of your websites.
Out-of-the-box simple configuration - you just add your URL and it works!
I like receiving the weekly website health summary - a great overview that allows me to see how our website is being maintained.
I can see the actual changes to my pages.

Cons: We could have started using it earlier, which would have helped us do some optimizations early on. But as far as the product goes - no complaints.

Overall: It is evident that every element is carefully thought through by a team of SEO experts. We've been using ContentKing for over a year and the product keeps evolving with more and more features. This is a great addition to our toolset that gives us peace of mind when it comes to managing and optimizing our website.

Pros: - Sped up my internal link audits, simple things like filtering by unlinked pages in a certain segment, or being able to export lists of links to redirects/canonicals internally is very useful. Finding broken internal links is also super speedy with this tool.

- Ensures I know about any major changes to sites I work on and sends me alerts when a page change type of links become broken etc. This is like insurance for your website when you have creative devs, clients, or buggy servers.

- Helps me delegate some time-consuming work (Updating titles/descriptions of product pages)

- Thanks to the alerts it provides, provided me pages which became unindexable, or vice versa due to developer error

- Segmenting tools help me find information on the pages I need fast

- Makes tracking multiple sites much simpler

- The support team is great

Cons: Could add an "ignore" option on a page level, for example, for unlinked pages that you know you'll never need/never change.

CK Offers a purge orphans option, and similar ways to achieve this, but when looking at for example an unlinked page (both internally and externally) it would be nice to click "ignore" and stop tracking changes/filter out the page from the software.

I guess it's a good idea to track this type of page anyways though, but couldn't think of any other cons at all!

Overall: I use CK on a regular basis. Their support team are friendly, and it's a tool I wish I had years ago.

Pros: Easy to use
Live page information
In-depth page analysis

Cons: Lack of Schema markup assistance is a negative. Adding this would be helpful, given Google's structured data testing tool is great at telling you you've made a mistake, but very reticent to give useful advice on how to fix.

Overall: An easy to use tool that helps break down what can be overwhelming projects into bite-sized tasks. As a result, my sites are more optimised than they've ever been.

Pros: Email alerts have taken away the need for any SEO and development worries. If something changes, ContentKing makes sure I know about it.

Cons: There are some specific features I'd like for my situation which aren't yet developed for the app, however I've contacted support and they actually followed up to take a lot of notes and are considering pushing the features out.

Overall: 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.

Pros: 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.

Cons: Honestly I can't think of anything I really dislike. Perhaps the per-page pricing can be a little awkward at first (wasn't entirely sure how many pages we had) but that's a very very minor point in what is overall an excellent product.

Overall: We can ensure that our development and search visibility teams are now fully aligned, and any SEO disasters are quickly averted thanks to the real time change tracking.

Pros: The simplicity of it - the fact I can set it up for clients in minutes and it just keeps everyting monitored - alerts and updates are excellent - as well as the interface, I can use it on a mobile.
It is also fantastic value for money compared with other tools out there

Cons: Currently the only issue is that it doesn't look at JavaScript - but then as Google is terrible at it - it isn't a major issue

Overall: Great user experience, love it to monitor all my clients sites (around 20) which means I don't have to much every day about checking things. The features are absolutely excellent and hopefully they will continue to monitor it