If you notice your site is taking a long time to load, then you should first use PageSpeed Insights to see what can quickly be optimized (also check your file sizes, hosting server, NGINX and other common sources of slow speed, too.) And, if you've notice gradually fewer Organic Search visits, PageSpeed Insights might be able to help. As Google is reducing the prevalence of slow sites, you could be losing traffic. Speed up your page load times by finding what is blocking renders, slowing down contentful paints, and other critical page speed signals.
If someone is looking for a SEO tool that excels in finding technical issues for a site, Lumar is a fantastic choice. Not only does it outline everything that's wrong, it does a much better job than other tools as to showing you how it the issue is presented. For instance many tools could outline a temporary redirect on your site, but Lumar will show you where that redirect starts, if there's a chain involved, and why it's worth fixing
I find the loading panel during a crawl to be a bit deceptive. It's very hard to tell how long a crawl will take—a more accurate estimate would go a long way.
I love the "fetch time" tab in theory, but I have a hard time believing it—not that the figure they give is untrue, but I find it at wide variance with other tools. PageSpeedInsights will have a site looking disastrous and DeepCrawl will log it all fetching "quick". But perhaps page speed is just notoriously difficult to assess.
It's great once you know how to use it... That being said there can definitely be some hiccups trying to learn the program. Even when writing this review i originally gave it an 8 and realized how many things I didn't even know existed after using it for a couple of years. Not the best 'usability' if you can't even find all the features you might want to use.
I liked the platform overall. It is a good crawler. I no longer use because it's duplicate of what I get with seoClarity. I did not give it 10/10 because sometimes I had a hard time isolating site areas that I wanted and didn't get much technical support from Conductor on how to use the tool
I think GTmetrix has some feedback that PageSpeed doesn't provide, but Google's tool is easier overall and has a better user experience; also offers compressed images, CSS, and javascript files if that's the case. Also, Google has extensive documentation to help you better understand what can be done to improve your grade.
All of the products I have used have been amazing in their own way, but DeepCrawl makes it easier to put it into visuals. Sometimes when you look at results, it can be quite difficult to get something easy to understand. DeepCrawl gets rid of that, the results are so easy to comprehend. I would recommend it to any data consultant (DC).