What is our primary use case?
My main use case for Device42 is building the as-is for the customer while discovering the virtualization environment, whether it's Azure, VMware, or Hyper-V, and adding the VMs which are important to it and related to the application. After that, I build the Application Dependency Mapping (ADP) to show the customer which applications are more important for building business resilience, creating a report that highlights which business or application is the most critical.
A quick, specific example of how I used Device42 for this project is its main purpose, which is to build all the application dependency mapping. The tool captures all connections to or from the server and displays them in the file, which helped me immensely because it sniffs all the servers, collecting tons of data simultaneously. This capability is something the network team or security team could never manage within a similar time frame; capturing all this traffic at once would take them a much longer amount of time.
What is most valuable?
The best feature Device42 offers for me is the Application Dependency Mapping (ADP).
What stands out to me about the Application Dependency Mapping feature is both its accuracy and visualization.
Device42 positively impacts my organization because we build the as-is as soon as possible. It helps us avoid the delays that would occur if we went to the network team or security team, which would take much longer than what Device42 requires. With Device42, I captured more than 100 traffic entries in just two weeks, which was great.
What needs improvement?
An additional positive outcome I noticed is that it would be nice to have a video showing how to install and use Device42, as sometimes the documentation is not clear. A video would make it more efficient. Additionally, when I contacted support about a corrupted file as shown in the documentation for the ADP, the file they provided was not useful. Fortunately, a team member with experience assisted me with the BI server, which was better. Improving the documentation to be clearer and adding a video would be helpful.
I chose a nine for Device42 because it captures a lot of traffic in no time, which is perfect for me, and it is straightforward and easy to use. However, the documentation has not been updated in a while, so it needs updates. To reach a ten, I would prefer a feature that allows for smaller intervals for scheduling, ideally running every one hour or less, instead of just once a day at one o'clock AM.
For how long have I used the solution?
I have been using Device42 since I just finished the project I started in August 2025, and we completed it in January 2026.
What do I think about the stability of the solution?
Device42 has been very stable in my experience.
What do I think about the scalability of the solution?
Device42's scalability works well for me; if I want to add more resources, such as a Remote Collector for a new site, I can easily connect it to the main appliance.
How are customer service and support?
The customer support for Device42 is perfect; they respond in less than 24 hours and follow up, which I really appreciate.
How would you rate customer service and support?
Which solution did I use previously and why did I switch?
Previously, this work was done manually, extracting from RV tools, sniffing one by one, and using Watchdog, which was painful.
What was our ROI?
I have seen a return on investment from using Device42, as I was the only one who did the full exercise and it was easy for me. I worked about 8 to 16 hours per week, which was sufficient to deliver. This efficiency with time and resources was perfect; however, I do not know about the costs since I am not involved in that aspect.
What other advice do I have?
I have nothing else to add about my main use case or how Device42 helped in this project.
I do not have anything else to add about the features or any smaller details I found handy.
My advice for others looking into using Device42 is to follow the steps in the documents, and if you encounter any obstacles, do not hesitate to contact customer service, as they are perfect, supportive, and reply quickly.
An additional thought I have about Device42 is that if you could create a video, that would be perfect for me.
I gave Device42 a rating of 9 out of 10.
Which deployment model are you using for this solution?
On-premises
Disclosure: My company does not have a business relationship with this vendor other than being a customer.