I've also used Portswigger Burp. I can use both at the same time and use extensions to leverage them together. 

We're currently moving away from OWASP to PortSwigger Burp Suite Professional. It's more user-friendly with a better interface. It also comes with professional licensing. I've reached out to the support team, and the quantity of content and resources is significantly greater than Zap offers.

For me, OWASP Zap is quite a good application. The good thing about OWASP Zap is that many features are free, and we can use them.

I have used several solutions, such as Nessus, WebInspect, and Retina. The retina is a network scanner but OWASP is the best.

I used to use Portswigger Burp. This solution is free and has a lot of the paid versions Burp offers. I haven't used Burp Professional. I used the community version. I chose this solution as it is faster, at least compared to the community version. My understanding it the paid version of Burp is very fast.

I'm not a security specialist, however, to be clear, we provide services. On a development project, we frequently run into various solutions. It's not just OWASP. It could be Veracode, for example, or multiple other tools. 

We previously used Net Packer.

I use a lot of different tools, the right tool for the job. Burp Suite, IBM Security AppScan, InMap, NIKTO, Wpscan. Depending on what you find, you might have to use better tools so OWASP Zap. I don't know if it's copyright infringement or not, given that it's open source, but it's possible they could build someone else's tools into the GUI of OWASP Zap. As the months and years go by, you'll probably see more features in there.

I'd have to say Burp Suite Pro, which is the licensed, paid-for version, is better but that's just because it's got more funding.

OWASP ZAP is one of the solutions that I use. For simple tasks, I use Fiddler. For other advanced techniques, I use the Burp Suite. I would say OWASP ZAP is a really light, useful tool in the middle of the other two mentioned.

Yes, we actually use a couple of different products but there is one specifically that we use, which is the Burp Suite.

We tried PortSwigger Burp suite, but only briefly. We have also used IBM AppScan for a while.

We previously used the PortSwigger Burp Suite. It's a commercial version with support. We had to pay for the solution on a yearly basis, whereas OWASP is open-source and free.

I've used many HTTP intercepting proxies, ZAP is one of the few that has an excellent API to program against. Using ZAP manually is also very fully featured.

I have used other solutions, such as AngularJS.

No