"Spammers"

I wouldn't even consider using this company.

They have been sending us incessant unsolicited spam emails without any kind of unsubscribe link. They show a UK address, but it's a rented office space. They are either a much smaller business than they make out, or are really based overseas.

If their approach to data protection is so cavalier even before we sign up with them, how could I possibly trust my business data with them ?

"just a third class cheap software , waste of money and time as well"

if you want to waste your money and time as well then you just use this software otherwise there is nothing to use you can't list any item easily, you can print order or label easily if you ask them that features does not work it take 30 days to resolve the issue and you can just pay them free of cost without using the software they denied to refund you money. I highly recommend don't waste your time to move into this.

"I've tried using the software and it is…"

I've tried using the software and it is very poor, nothing works as advertised. I was practically helping them develop the software. I had to contact etsy myself to get them to help kartzhub integrate as all my listings wouldn't transfer correctly, it was full of glitches. It doesn't integrate with any of the parcel companies, it only seems to create csv files. The design of kartzhub is like using something from 1999, very old fashioned and difficult to navigate. Be very wary of this software. I asked for a refund but they wouldn't give it. Just don't use kartzhub, there are plenty of other order software companies that do it much better!!

"Kartzhub is much easier to use than…"

Kartzhub is much easier to use than competitive products. There's almost no learning curve. You'll be up and running within an hour! I've been using Kartzhub since the middle of last year and continue to be impressed. It does a very good job managing our inventory on Amazon, eBay and Big Commerce and adding listings to eBay is pretty easy

"A very dodgy company that does not care about privacy"

A very dodgy company that does not care about user privacy. I run a meetup group, a non-profitable one, helping beginners to set up and run their small-medium eCommerce marketplace businesses. The trust levels are very high in my group.

One or many of the sales people from KartzHub joined in our group and started directly contacting our members through their phone numbers, which is absolutely against the UK/EU GDPR laws.

Imagine how such dodgy sales people can be in doing business with you when you buy their services. Such "I need only customer's money"-minded companies should be eradicated from existence, in my humble opinion.

Sorry to say, even "if" they really have legitimately helping software, such practices will only be considered anti-customer-friendly, leading to a disastrous experience.