XingHelper and ZingBot both automate work on XING, but they place the emphasis differently.
What XingHelper does
XingHelper is a broad XING automation suite: profile scraping and export, messaging, posting and networking campaigns, CSV exports. Messaging automation requires a XING Premium account; scraping, networking and posting do not. The vendor states explicitly that it is not affiliated with XING.
What ZingBot covers — and what it does not
Overlapping: contact requests and messages in sequence, follow-ups, and stopping the moment someone replies — all inside your own XING account.
Not overlapping, and worth saying plainly: ZingBot is not a scraping or export tool. There is no CSV extraction of profile data and no posting automation. ZingBot works lists you bring in through the standard XING import or the TalentManager import.
If what you want is primarily a data source, ZingBot is not the right tool. If it is outreach and follow-up for recruiting, that is exactly what it is built for.