Datanyze can be a useful tool for understanding your market. You're able to use Datanyze to see how many people are using your technology as well as who is using your competitors. Receiving alerts on who is adding and dropping you vs your competitors is always helpful. It's a tool that can potentially give back as much as you put in.
It's a great research tool to give someone a direction but it's definitely not the most accurate tool. The agency hierarchy (it shows the holding company structures) and client relationships are awesome. Certain webcrawler activities should available in reports but on the other hand MR builts custom reports if needed. Overall, it's a great tool for sales development. It helps sales and marketing to get started but not to rely on it 100%.
One of the strengths of Media Radar is that it has a lot of brands in the database. The big money spenders are there, along with smaller brands and startups. This is helpful when I'm looking for information for smaller brands, because I cannot say the same about other products I use.
The contact information is super organized and the site overall is very user-friendly.
Datanyze used to give really good data on specific person level. You could then look up prospects using the Chrome extension inside of LinkedIn. This made prospecting extremely easy and very efficient. Unfortunately, this no longer exists and it is much harder to do without their data.
I have found that sometimes the data inside of datanyze is not always current. When reaching out to companies they will mention that they were just testing a tool, not fully using it.
There are really no other places to push the data from Datanyze except for Salesforce. This makes it tough when using other tools or CRMs.
I've used products like Builtwith and Wappalyzer and neither compare to the level and organization of data within Datanyze. It's much more robust and easy to access. However, it isn't perfect and sometimes needs to be updated, or removed and re-installed simply for it to function
MediaRadar is what my company chooses to use for this purpose because of a few specific unique things it does, such as tracking competitors and allowing us to make mock-ups.