Integration Guides

Before you commission an integration, the same questions usually come up: What does it cost? Is a ready-made connector or a tool like Zapier enough? And how does the data reach your tax advisor in DATEV? Our guides answer these questions plainly and with sources. If a ready-made product is enough, we say so. Every statement about third-party products carries a date, because plans and features change.

Costs and planning

• What does an integration cost? Eight cost drivers, four cost models, total cost over three years and a checklist for your quote.
• Connector or custom integration? Criteria and a checklist for choosing between a standard product and a custom solution.

Comparing tools

• Zapier alternative: Zapier, Make, n8n and Power Automate put into fair perspective, with cost logic, data protection and the question of DATEV.

Accounting and tax advisors

• DATEV API: access and routes into DATEV. Posting batches (Buchungsstapel), receipts and online APIs, and what your tax firm has to approve.

We explain technical terms in the glossary. If you would rather talk about your project directly: the integration check takes 30 minutes and is free. Get in touch.

Updated: 10/20/2026