Using StackEx as a prefix for the name of my app?

Question

According to trademark guidance:

[...] Including one of the terms, "Stack" or "Exchange" or "Overflow" in your product name is generally okay.

I'd like to use "StackEx" as a prefix for my app name (e.g., "StackExcavate", "StackExSave") - Is this allowed?
Also, what about replacing the "Ex" with just "X" (e.g., "StackXplore")?

• I saw this question to which Joel suggested to contact the team, which I did (with more questions) some time ago, but didn't get an answer (well, yet).

Answer 1

[mandatory I Am Not A Lawyer prefix]

Do not overthink this - using a part of the Stack Exchange trademark, especially if it occurs naturally in the name of your app, is perfectly fine (unless you are trying to make a competitor service and then register it as a trademark yourself - this might get a bit more complicated).

The important part of the quote you provided is not the example, it is this part:

Do name your application with something unique.

There are numerous prominent user organizations, applications, and scripts that are using the trademark even in full (the Stack Overflow one) - however, they are called sufficiently uniquely to be absolutely in the clear:

• SOBotics
• SOCVR (Stack Overflow Close Vote Reviewers)
• SOX (Stack Overflow Extras)
• SOUP (The Stack Overflow Unofficial Patch)

The list goes on. Some of the above explicitly add a note that they are not affiliated with Stack Exchange (e.g. SOBotic's "We are not affiliated with Stack Overflow or the Stack Exchange Network."), though.