[return0]

That's not very devilish, there is clear room for confusion here, the OP should seek another name.

anecdotally, I don't use either, but i 've heard of zendesk, and would naturally associate zenbilling with them.

[yashg]

Now, zendesk doesn't own the word zen do they? Does this mean anyone in the world now can not use the word zen anywhere in the name if they are in the SaaS business?

I believe they also had a problem with a company named FreshDesk which was a direct competitor.

http://www.ripoffornot.org/

I just see a company being bully here.

[return0]

Obviously they don't there is potential for confusion it would be settled in court (unlike, for example, zenRobotics)