Cortena is a Finmatics alternative for teams that want an agent, not another document pipeline to babysit.
Finmatics is a known AI bookkeeping player in the German DATEV and tax-advisor space. Cortena.ai starts from a different premise. You brief an agent the way you would brief a bookkeeper, and it codes every field with a reason you can read. Here is a fair, factual comparison so you can decide which one fits.
Comparison written and reviewed July 2026. Where a Finmatics detail is not publicly documented, we mark it "varies" rather than guess.
What Finmatics does well.
We are not here to run Finmatics down. It is a serious product for Kanzleien and DATEV workflows. Credit where it is due.
Strong DATEV and Kanzlei presence
Finmatics is visible with tax advisors and German mid-market buyers evaluating AI bookkeeping. That ecosystem familiarity matters.
AI bookkeeping focus
The product is aimed at automated bookkeeping rather than a generic OCR inbox, which is closer to the real work than capture-only tools.
Published comparison content
Finmatics invests in German-language guides and roundups that finance buyers actually find in search. That content discipline is real.
If those points describe what you need, Finmatics may be the right fit and you can stop reading here. The rest of this page is for teams who want agent-first coding with readable reasons on every field.
Pipeline tools still leave humans to finish the coding.
Many AI bookkeeping tools still centre on extraction and routing, then ask your team to complete and maintain the coding. Cortena.ai is agent-first. You instruct it once, in plain language, and it does the coding with a reason on every field.
Explainable AI on every field, not a black-box guess.
Cortena.ai codes the GL account, cost centre and VAT key, and shows why it chose each one: the precedent it followed, the rule it matched, the line it read. Your team reviews reasoning, not a bare suggestion.
- Account, cost centre and BU code coded per line
- A plain-language reason attached to every field
- Precedent learning from your own corrections
Recurring server hosting from Hetzner Online GmbH. Last 6 invoices booked to 6837 (IT services), cost centre 4200. Reverse-charge not applicable, German VAT 19 %.
You brief it like a bookkeeper, not a rules engine.
Instead of building and maintaining rigid if-this-then-that rules, you write guidelines in plain language. Cortena.ai follows the briefing and asks when it is not sure.
- Guidelines in plain language, not rule trees
- Judgement on edge cases, questions when unsure
- One briefing that improves as your books do
The honest comparison.
Row by row, on the dimensions that actually change your week. Cortena facts are what we ship today. Finmatics facts we keep to what is publicly documented, and mark the rest "varies".
Finmatics is a capable product and its exact behaviour depends on plan, configuration and your tax advisor's setup. Where we could not verify a detail from public sources, we wrote "varies" instead of inventing one. If any fact here is out of date, tell us and we will correct it.
Who should pick which.
Finmatics is the better fit when
- Your Steuerberater already runs Finmatics and prefers that stack.
- You want a Kanzlei-centric AI bookkeeping suite first.
- You value an established German AI bookkeeping brand over a newer agent approach.
Cortena is the better fit when
- You want coding done for you, with a reason on every field.
- You would rather brief an agent than maintain a pipeline.
- You run several entities and want workflows to inherit.
- You want free white-glove setup and the official DATEV service.
Moving from Finmatics takes about 15 days.
There is no ledger migration to dread. Your books stay where they are and your accountant keeps their tool. We connect your invoice inbox, learn your accounts and rules from your history, and run alongside you until the coding earns your trust.
See multi-entity onboarding- 1Connect and brief, day 1Point your invoice inbox at Cortena and write your first briefing. No migration, no project team.
- 2Learn from your historyCortena studies past codings and your chart of accounts, then codes new invoices side by side with you.
- 3Go live in 15 daysOnce the coding is right, you review by exception and export booking-ready batches straight to DATEV.
Questions people ask before switching.
Yes, for teams that want an agent to do the coding rather than another bookkeeping pipeline to supervise. Both target DATEV-oriented automation, but Cortena.ai codes every field with an explainable reason and is briefed in plain language.
Cortena.ai uses the official DATEV Rechnungsdatenservice 1.0 to send booking-ready entries into DATEV Unternehmen online, with the source document attached. The archive stays in DATEV, and Cortena works GoBD-aligned.
No. There is no ledger migration. Your books stay where they are, your accountant keeps their tool, and Cortena connects to your invoice inbox and learns from your history. Most teams are live in about 15 days with free white-glove setup.
Cortena is built for multi-entity work. Workflows and briefings inherit across Mandanten, and a root mailbox can route invoices to the right entity automatically.
We have tried hard to keep it fair. We credit what Finmatics does well and, where a detail is not publicly documented, we mark it "varies" rather than invent a fact. If anything here is wrong or out of date, tell us and we will fix it.
- Still have a question?
See the difference on your own invoices.
Book a demo and bring a week of real supplier invoices. We will code them live, reason on every field, so you can compare for yourself.
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