Jurisdiction
Italy
Italy runs all B2B invoicing through the Sistema di Interscambio, and open-source libraries cover the FatturaPA format end to end — generation, validation, digital signature, and transmission. It's a focused ecosystem doing one mandatory thing well.
What's missing
Building it? SubmitAnything beyond e-invoicing. IRPEF/IRES rules modeling, declaration tooling, and Agenzia delle Entrate integrations are open-source deserts.
3 projects tagged Italy, ranked by community stars.
UncategorizedActive
FatturaElettronica.NET
FatturaElettronica/FatturaElettronica.NET
Fattura Elettronica per le aziende e la Pubblica Amministrazione Italiana