
BillingEngine
7.4#4 in electronic invoicing softwareFrom €6 a monthFree planWebAPI
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| Fact | BillingEngine | SmartBill |
|---|---|---|
| API | Paid plans include a documented REST API for customers, invoices and payments. | 개발자센터는 전자세금계산서 단건·대량 발행, 조회·수정·삭제 및 국세청 전송 API를 안내한다. |
| Headquarters | Hamburg, Germany | Seoul, South Korea |
BillingEngine suits freelancers and small businesses that need e-invoicing, quotes, reminders, expense receipts, and accounting exports. Its free plan may suit a one-user operation with low monthly document volumes.
You want what its maker publishes above — check its page for the details.