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With OS/ we manage 21 million euros in turnover and more than 8,500 receipts per year with 1.5 accounting employees...

Melanie Fischer - Head of Accounting, Parasol Island GmbH

Melanie FischerHead of Accounting, Parasol Island GmbH

GoBD-compliant and simple documentation directly in DATEV

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No more worries about bookkeeping! OS/ makes it easy for you to drastically reduce your accounting workload. Imagine a world where invoices find their way into DATEV, are checked and approved almost automatically.

From output to DATEV, OS/ manages your accounting in the project context

OS/ Agentursoftware Integration: PleoDATEV LogoOS/ Agentursoftware Integration: Moss OS/ Agentursoftware Integration: Spendesk

Everything to do with accounting with OS/

/Is OS/GoDB compliant?

OS/ takes data protection and compliance very seriously and is fully GoBD-compliant. All your data and processes within OS/ comply with the strict GoBD guidelines.

/Is OS/a DMS?

With OS/ at your side, you don't need any additional invoicing software. OS/ is your complete solution that integrates all essential accounting functions - from invoicing and cost tracking to transmission to your DATEV or tax consultant.

/How difficult is it to convert my accounting to OS?

We have made the transition of your accounting to OS/ as simple and straightforward as possible. Our goal is to provide you with a smooth transition without having to go through complicated processes. With a user-friendly interface and a dedicated support team at your side, switching to OS/ is not only easy, but also stress-free.

OS/ 💚 DATEV

OS/ Schnittstelle

OS/ optimizes your accounting data for DATEV companies seamlessly online, transfers it automatically via DATEV API or as a DATEV XML archive for manual dispatch. Save valuable time and see meaningful results faster, whichever way you choose.

Step 1

Invoice entry and creation

OS/ enables the time-efficient entry of incoming invoices directly in the project context, regardless of who enters the invoice within the company.

An innovative feature is the direct creation of new suppliers from the Google Places database, including all available address data directly from the document entry. It's that simple.

The outgoing invoice is also generated in minutes. Regardless of whether it's an invoice on account, item billing, final billing or additional costs. OS/ adapts to your workflow and your individual needs.

Step 2

Invoice approvals

Invoices are approved directly in OS/ by the project manager and accountant. This means that only GoBD-compliant and flawless invoices end up in DATEV, which saves a lot of coordination and discussion time.

Step 3

Additional invoice data

Before invoices are sent to DATEV, OS/ enriches them with extensive additional information such as booking accounts, bank accounts, cost centers (KST1 and KST2) and other details from OS/ Contacts.

This extended data preparation considerably reduces the processing effort in DATEV and enables error-free and efficient accounting.

Step 4

Transfer to DATEV

The DATEV Online API enables OS/ to transmit your invoice data directly. This data is immediately available to you and your tax consultant or auditor, which considerably simplifies and accelerates the exchange of information and collaboration.

OS/ Buchhaltung OS/ Buchhaltung OS/ Buchhaltung OS/ Buchhaltung

We will be happy to advise you on a personal product tour

Book your OS/Expert appointment now. Our experts will give you a personal overview of relevant functions, answer all your questions and set up an individual test account for your business.

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Häufig gestellte Fragen

Der Fragetext steht hier

OS/ ist für Unternehmen jeder Größe geeignet. Unsere Business-Tarife bieten Enterprise-Qualität auch für kleine Unternehmen, während unser Enterprise-Service maßgeschneiderte Service- und Support-Optionen für große Unternehmen, Gruppen und Netzwerke bietet.

Der Fragetext steht hier

OS/ arbeitet nahtlos mit DATEV Unternehmen online zusammen, um Deine gesamte Buchhaltung zu vereinfachen. Alle Belegdaten inklusive ihrer Metadaten werden automatisch in DATEV Unternehmen online bereitgestellt, was maximale Effizienz garantiert.

Der Fragetext steht hier

Du kannst Lieferantenkosten entweder manuell als Belege einbuchen oder sie automatisch über eine Integration wie Pleo übernehmen.

Der Fragetext steht hier

Ja, mit OS/ kannst Du alle Projektkennzahlen als Excel-Dateien und alle Berichte als CSV-Dateien exportieren, um sie für Deine individuellen Auswertungen zu nutzen.