The best invoicing API
in Romania.

The most critical differentiator for any Romanian invoicing API in 2024 is E-Factura support. ANAF requires all B2B invoices to be submitted electronically to the SPV portal. APIs that were built before this requirement often treat E-Factura as an add-on, requiring extra configuration steps or separate endpoints. Billyou was designed API-first with E-Factura at its core: set spv: true on invoice creation and the rest is handled automatically, including digital signature, XML generation and ANAF response handling.

Not all APIs that claim E-Factura support actually integrate with SPV deeply. Some require you to download the signed XML and upload it to ANAF yourself. Others have no error handling for ANAF rejections. Billyou maintains a persistent OAuth2 connection with SPV, polls for results, fires webhook events on every status change and automatically retries on transient ANAF errors. Your application is insulated from the complexity of ANAF infrastructure.

Most Romanian invoicing APIs charge per invoice above a monthly threshold. At scale, this becomes unpredictable and expensive. For a marketplace processing 50,000 invoices per month, per-invoice pricing can be 10x more expensive than a flat subscription. Billyou charges a flat monthly subscription with no per-invoice fees, regardless of volume. The cost is completely predictable.

Good developer experience means: interactive API documentation with live examples, first-party SDKs in the languages your team uses, a sandbox environment that behaves identically to production, and webhooks so you can build reactive integrations without polling. Billyou provides all of these. Competitors typically offer at most one or two of these features.

Billyou runs on distributed infrastructure with a 99.9% uptime SLA. The API is served from multiple availability zones. Rate limits on enterprise plans are removed. Billyou also acts as a buffer between your application and ANAF infrastructure: if ANAF is temporarily unavailable, Billyou queues and retries submissions automatically rather than returning errors to your application.