We decided to go for Exemptify as we needed to be able to sell to European Business Customers with a EU tax exempt. There are not many solutions, and most app vendors (including Shopify) do most of the times not understand the different tax and consumer laws in Europe. Exemptify does allow you to have prices excl. VAT in Shopify, add the tax amount when needed, add no tax when a customer has a valid tax exempt, and still show consumer pricing INCLUDING VAT in your store at all times. Not like the US, Canada, UK, etc calculating and showing it when checking out.
It was not flawless from day one, as we had to do some adjustments to our stores template. But Thorsten was very responsive, very helpful, and extremely knowledgeable. So now we are very happy with our perfect working solution for now, thanks to Thorsten. Our store has grown tremendously since then.
Good to see that there are app developers who are able to compensate for a fairly major flaw in a product (Shopify) which is basically not yet made for the European market. The same is true for languages in Shopify !
Works as advertised. Easy to set up and has good support from the developer.