Most scope-creep and change-order tools are US-first, USD pricing, EU tax bolted on if handled at all. Addenly is EU-native from day one: automatic VAT/OSS logic based on your client's country (domestic rate, reverse-charge B2B, or OSS for B2C), EUR invoicing. AI drafts a change order from the client's message in seconds with an hour estimate and price, not just reworded text. The client approves via a magic-link, no account needed, and you get a compliant, tax-correct invoice out the other end.