Automate invoice bookkeeping in
DATEV Rechnungswesen.
Cortena codes every supplier invoice to your SKR03/SKR04 rules and posts booking-ready entries into Rechnungswesen. Your team reviews the exceptions instead of keying entries, so finance scales with volume, not headcount. And when a tool in your stack doesn't feed DATEV cleanly, Cortena bridges it: no CSV, no manual transfer.
What Cortena adds to DATEV Rechnungswesen.
DATEV is where your accounting lives. Cortena is the layer that fills it, so entries arrive booking-ready and your team spends its time on judgement, not data entry.
Bookkeeping done for you
Every invoice is read and coded to your SKR rules with the right cost centre and VAT key, then prepared booking-ready for Rechnungswesen. You set the control points, and nothing reaches your books without your sign-off.
Scale volume, not headcount
When invoice count doubles, the work doesn't. Cortena handles around 90% of the volume, so your team moves from keying entries to review, analysis, and the close. You grow without adding finance hires.
Bridge the tools DATEV doesn't
Other ERPs, accounting software, and spend tools rarely connect to DATEV seamlessly, which today means manual exports and CSV files. Cortena bridges those tools to DATEV and lands the data booking-ready, so the manual work goes away.
From inbox to DATEV: fully automated invoice processing.
Cortena reads every invoice from your inbox, codes and books it to your accounting rules, and posts it to DATEV with one click. You control the workflow: approvals, reviews, and thresholds. Everything configurable.
Reads your inbox
Cortena automatically reads all incoming invoices from your inbox.
Entity identified & routed
Detects which entity each invoice belongs to and routes it to the right client.
Bookkeeping agent
Codes and books every invoice to your accounting rules.
Your workflow, your rules
Set approvals, reviews, and thresholds. Everything configurable.
Exported to DATEV in one click
Direct export or manually with a click. Your choice.
Direct integration with DATEV. No CSV exports, no manual transfer.
Cortena connects to DATEV Unternehmen Online and DATEV Rechnungswesen. DATEV users can decide which system best fits their workflow and define exactly which steps Cortena handles. Everything is configurable in Cortena.
Cortena and DATEV Rechnungswesen, side by side
Cortena is the operator up front: capture, coding, and approvals. After approval, invoices are booked in DATEV Rechnungswesen, your in-house book of record. We are honest about the line.
The book of record stays inside DATEV Rechnungswesen. Cortena does the work up front and hands over booking-ready invoices, it does not replace your accounting system. See the DATEV Unternehmen online path
More than exporting. Real accounting automation.
Everything you need to move invoices from inbox to DATEV. Without manual work. Built for digital accounting in Germany, with DATEV logic at the core.
Auto-categorization with confidence score
Cortena learns your SKR03/SKR04 accounts and cost-center logic from historical documents. Every prediction comes with a confidence score: you see where the AI is reliable and where it isn't.
Your workflow, exactly how you want it
In-house or outsourced accounting, DATEV Unternehmen Online or Rechnungswesen. You decide which system to connect, where approvals happen, and how the process runs.
Export to DATEV in one click
Export runs automatically in the background or is triggered manually with a click. No CSV files, no manual transfer.
GoBD audit trail
Every AI decision, every correction, every sync is explained and logged. Fully auditable.
Bank reconciliation
Open-banking connection to Deutsche Bank, LBBW, Sparkasse, and others. Bank lines are automatically matched to invoices.
Line-item cost allocation
Cortena splits every invoice line and assigns cost centers, accounts, and BU codes at the line-item level. You set the rules and decide how it's done. Cortena follows your guidelines and handles it automatically, so finance teams can spend their time on what matters.
Agents that understand your rules
Invoices arrive and are seamlessly prepared for DATEV. Cortena's agents learn your accounting logic, apply it consistently to every invoice, and get better over time.
What you should know about the DATEV integration.
DATEV Unternehmen Online (DUo) is the bookkeeping platform where documents and booking suggestions are stored before your tax advisor transfers them into DATEV Rechnungswesen. Cortena connects to both. DATEV users can decide which integration best fits their workflow and define exactly which steps Cortena handles within the platform.
Cortena uses the official DATEV API. Documents, booking entries, accounts, and cost centers are synced directly: no CSV exports, no manual transfer. The connection is OAuth-based and live in 15 minutes.
No. Cortena automates the upstream work you do today: capturing documents, categorizing them, and preparing them for DATEV. Your tax advisor receives clean, pre-coded data and can focus on year-end closing, tax optimization, and advisory work.
Yes. Every AI decision is explained with a confidence score and logged in the audit trail. Documents stay archived unchanged and every correction is fully traceable. Cortena is GoBD-aligned and runs on ISO 27001 certified infrastructure in Germany.
Exclusively in the EU. Cortena hosts on dedicated servers in Germany (Hetzner). Your financial data never leaves the EU and is never used to train external AI models.
The DATEV connection is established in 15 minutes: OAuth login, client selection, done. Cortena then learns for 7 days from your historical documents. After that, the AI handles around 90% of your invoice volume for you.
Want to run DATEV without the manual work?
Cortena codes and books your invoices straight into Rechnungswesen, so your team reviews instead of keying. Book a demo and see it on your own invoices.