Billyou vs Smartbill API
A technical comparison for developers evaluating invoicing APIs for Romania. Focused on E-Factura, developer experience and production reliability.
Feature comparison
Key differences
E-Factura: automatic vs manual
Billyou submits invoices to SPV ANAF automatically when you create them, with digital signature included. Smartbill requires a separate manual step through their web interface or a more complex API workflow. For developers building automated pipelines, this makes a significant difference in integration complexity.
Real-time webhooks vs polling
Billyou fires webhook events for every status change: invoice.created, invoice.sent_spv, invoice.confirmed, invoice.rejected. Smartbill does not offer webhooks; you must poll the API repeatedly to check status. This results in higher API usage and slower reaction times in your application.
SDK availability
Billyou offers official SDKs for Node.js, Python and PHP with full TypeScript types and automatic retry logic. Smartbill only offers a PHP client library. Teams building on Node.js or Python must write their own integration from scratch against the Smartbill API.
Pricing transparency
On a Billyou subscription there is no per-document fee and no overage between the soft and hard quota, so a spike month costs the same as a quiet one. We do offer pay as you go at 0.12 RON a document, but it is a deliberate choice for low or unpredictable volume, not a charge that switches itself on once you cross a threshold. Smartbill API charges per invoice above a threshold, which is what makes cost forecasting hard as your platform scales.
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