Public - Group chats.
vatlayer API - Free VAT Validation & EU VAT Rates API
Chalk - Chalk is a calculator that tries to do right what others do wrong.
VatStack - Simplify VAT & GST for your digital business.
Slaask - Slaask enables you to set up a dedicated live chat channel on your Slack.
vat-search.eu - VAT (Value Added Tax) ID - Numbers Search Lookup