Kintsugi vs VAT Sense

Kintsugi has no write-up on Specifiction yet; its figures are above.

VAT Sense is a REST API for VAT number checks and tax-related data, intended for use in other services. It validates numbers against live records in the UK, EU, Australia, Norway, Switzerland, South Africa, and Brazil, and provides EU VAT rates plus VAT and GST rates from other countries. It also supplies country data, currency conversions to GBP and EUR using official HMRC and European Central Bank rates, and VAT-compliant invoicing information. A validation can include an official government consultation number when the requester provides its own VAT number. The API requires HTTPS and HTTP Basic Auth. VAT Sense says client-side CORS requests are not supported because they could expose account API keys, and says the service uses 256-bit SSL. Client libraries are available for Python, Node.js, PHP, Go, Ruby, C#/.NET, and Java; the documentation also links to Postman collections. General limits are 300 requests per minute, with UK VAT validation limited to 3 requests per second. A free plan is available, and the pricing note lists paid plans from $6.99/mo. Plan prices exclude VAT, and payment can be in GBP, USD, or EUR.