To comply with Indian regulations, we require Indian customers to provide their business' GSTIN when purchasing a paid subscription on Hunter. Because Hunter is a B2B service, consumers that therefore do not have a valid GSTIN won't be able to perform a purchase.
On your invoices, you'll be able to see your GSTIN as well as a mention indicating that taxes should be paid on a reverse charge basis. You are responsible for paying those taxes.
Note that our Terms of Service include a section dedicated to India customers: https://hunter.io/terms-of-service/india.