I love DDD Invoices coverage of all types of transactions; including B2C, B2B, and B2G. They cover everything from fiscalization and compliant PDFs, to e-invoicing across many countries. The abstraction of local requirements is extremely well handled, making the integration very easy and fast. They also have a public API playground, which is really cool.

DDD Invoices simplifies handling of e-invoicing and fiscalization and supports software vendors customers. The platform is intuitive, quick to onboard, and feels built with the software vendors' end-users in mind. The automation around compliance checks and invoice validation saves companies hours each week and makes them compliant with local law and regulation. I especially appreciate how responsive the support team is – they don’t just fix issues, they give advice on best practices.