Open-source invoicing and e-invoicing for freelancers, small businesses and their accountants.
Host it yourself: quotes, invoices, payments and the paperwork that follows, including the e-invoicing rules of the country you bill from.
What you get
- Quotes, invoices, credit notes, purchase orders, goods receipts, expenses and received invoices —
one document engine, one lifecycle, one list and detail screen for every type.
- Payments, partial payments, deposits, instalments and settlement states computed from the record,
never stored on the document.
- Clients with their own portal, account statements and aged balance.
- An article catalogue with stock counts, project time tracking that turns into invoice lines, and
recurring documents.
- Bank statement import (CSV/OFX) with reference and amount matching, plus online payment methods.
- PDF generation, e-invoice XML (Factur-X, UBL, CII, XRechnung, Peppol BIS, FatturaPA, FA(3)) and
national transmission channels.
- A legal archive per issued document, with the retention duration and its starting point taken from
the country's own rule.
- Encrypted, scheduled backups of every archived document and uploaded file to a separate bucket,
with a key the storage provider never holds.
- Sign-in by e-mail/password, OIDC/SSO (instance-wide or per company) or API key; multi-company,
role-based access; webhooks, a REST API, an MCP server and a plugin system.
- 18 interface languages, per-recipient document language, multi-currency with rate history.
- Installable as a PWA, light and dark themes.
Screenshots
Invoice list, filtered by status, with the settlement state of each one.
The editor: every section on one page, VAT rates from the seller country's own rate list, and a live
preview of the document beside it.
Invoice detail: totals, settlement and the legal archive with its retention rule.
Quotes, convertible to invoices, with deposit and instalment requests.
Credit notes correct an invoice line by line, never freehand.
Purchase orders sent to suppliers.
Received invoices — uploaded, OCR-read into an editable proposal, then approved or rejected.
Client list with activity and supplier filters.
Account statement: every document, the balance and the aged balance.
The client portal — the client's own documents, balance, PDFs, payment and quote decisions.
Quote signing: a one-time code sent to the signer, then a signed quote.
Articles priced per hour, day, unit or service, with stock counts and low-stock alerts.
Time tracking per project, billable or not, turned into invoice lines in one step.
Bank reconciliation: import a statement, confirm the suggested match, get a real payment record.
Payment methods offered to clients, with the details each one shows on the document.
Company settings — the country decides which identifiers are asked for, and how they are labelled.
E-invoicing channels: connect the national platform the country expects, then use it as the invoice
transport.
Signing certificates for PAdES-signed PDFs.
E-mail templates, one per document type plus the system e-mails.
Country coverage
A country is data, not code: which actions a document allows, which identifiers a party must supply,
which correction route applies, which VAT rates exist, which channel and format a buyer requires, how
long an archive must be kept — each is its own catalogue of sourced facts, and every fact carries the
legal text it comes from.
Germany, France, Italy, Poland and Portugal ship with their catalogues filled in.
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