It is best suited for integrated security testing of applications which are hosted on web servers. The most important thing is the integration of DevSecOps which is crucial in today's fast paced environment of rapid development. The core of Acunetix is application scanning which is really great and I highly recommend this product to everyone
I don't know of any other tool that works as well as Wireshark for packet capture an inspection. It's extremely easy to get up and running, and even with little to no knowledge of how to use the tool, you can be looking at all the traffic coming off a network interface.
A more user-friendly interface would be nice, but then again it is not really designed for those who are not quite comfortable with this type of software.
Changes to functionality on updates - this can sometimes happen unexpectedly and can be an annoyance.
It's very simple and easy to use, although individuals not used to managing and administering networks would take some time to get familiar with it. Once they have mastered use of the application, it's easy to stay knowledgeable about it, iteration after iteration. It is well supported online through an open-source community network of professionals who are helpful in imparting knowledge and in providing assistance.
I don't believe Wireshark has "true" support as the software is open source. However, there is an active & friendly community around Wireshark that are more than happy to help answer questions. From a comprehensive Wiki and FAQ section on the site to the Ask a Question forum and bug tracker section, there's plenty of support options to make sure your questions and issues are addressed.
ZAP is a free tool, and adequate. But it is to that extent less friendly. I would not be as confident of the results and it definitely can't produce reports on par with Acunetix. There would be a lot of legwork on our end if we desired to switch to this tool.
Wireshark is a free tool that came highly recommended by one of our former network security consultants. Using the tool he was able to resolve all of our higher tier network tickets, so we observed first hand why we needed to add Wireshark into our toolset. We received in-depth instruction and training scenarios that demonstrated the effectiveness and power of the product, so we didn't spend any time reviewing competing products.
Saved money compared to other commercial scanners, especially over the long run.
Scan speed seems to be pretty good compared to some of the bulkier commercial products out there. However, that largely has to do with proper configuration.
A downside is that is requires a bit of extra work just to get it set up to scan APIs, web services, etc.