We make finance systems work together.
We connect what you already use. E-Rechnung, DATEV, Stripe, payments and finance automation for businesses in Germany.
We connect the systems behind how you invoice, get paid and reconcile money without replacing your existing stack.
Frankfurt-based · Senior implementation · Fixed-scope projects
Connect existing systems
Make finance data move through the stack you already use.
Connect invoices, payments, webhooks, ERP and accounting across the systems you already use, without adding manual handoffs.
Payment received ✓
Webhook failed ✕
CRM outdated ✕
Accounting mismatch ✕
We fix the workflow between systems, not just one API.
The problem
Your systems work individually. The workflow between them doesn't.
Payments, invoices, banks, ERP, CRM and accounting often contain the same financial information in different states. People become the integration layer.
Manual work
Finance moves information between systems by hand.
System mismatches
Payment, invoice and accounting status disagree.
Growing complexity
Every new payment method, system or requirement adds another connection.
We connect what you already use instead of replacing the stack.
What we solve
Start with the problem you already have.
E-Rechnung & DATEV
E-Rechnung isn't just a file-format problem.
It's a workflow problem.
Before
Invoice → email → manual validation → email approval → DATEV → bank → manual matching
After
E-Rechnung → validation → approval → DATEV / ERP → payment → reconciliation → exception only
Stripe & Payments
Build, migrate or fix your payment stack.
Connect Stripe with billing, CRM and accounting so payment state stays reliable across your business.
Payments · Billing · Connect · Subscriptions · Webhooks · Reconciliation
Discuss your Stripe setupPayment received ✓
Webhook failed ✕
CRM outdated ✕
Accounting mismatch ✕
We fix the workflow between systems, not just one API.
Finance Automation
If somebody copies the data, there is probably an integration missing.
We automate repetitive finance work around the systems you already use.
Incoming invoices
Invoice → validate → extract → approval → accounting → exception queue
Reconciliation
Stripe + PayPal + Bank → normalize → match → accounting → exceptions
Dunning
Overdue invoice → payment check → reminder → escalation → CRM update
How Fynteq works
Small project. Clear result.
Diagnose
Understand the problem and systems.
Map
Create the workflow and integration map.
Implement
Build or repair the connections.
Hand over
Documentation, monitoring and maintainable implementation.
No unnecessary platform replacement. Start with one workflow.
Ways to start
Fixed-scope entry points
E-Rechnung System Check
Map your invoice workflow, systems and integration gaps.
Request a system checkStripe Integration Review
Review payment flows, webhooks and downstream synchronization.
Review my Stripe setupCase study
E-Rechnung and DATEV Export for a German Publisher
Configured Stripe Tax, ZUGFeRD-compatible invoicing, and a DATEV export workflow tied to Stripe billing events.
Problem
A German publisher sold digital subscriptions across EU markets. Finance struggled with VAT rules, lacked ZUGFeRD-ready invoice output, and spent days each month manually preparing DATEV entries.
What Fynteq implemented
Configured Stripe Tax for the customer's EU subscription setup, implemented ZUGFeRD-compatible invoice generation and built a DATEV export workflow tied to Stripe billing events.
Systems
Stripe Tax · Stripe Billing · ZUGFeRD · DATEV
Outcomes
- Automated DATEV export from Stripe billing data
- Structured invoice output using ZUGFeRD
- Reduced manual month-end preparation
- EU subscription VAT configured in Stripe Tax
Technologies
We work with the systems you already use.
Payments
Accounting
Automation
Frankfurt & Germany
Frankfurt-based. Working across Germany.
Fynteq works directly with finance and technical teams to solve payment, invoicing and accounting integration problems.
Finance integration in Frankfurt- Senior implementation by the founder, not junior consultants.
- Fixed-scope projects with clear deliverables.
- Start with one workflow. Expand only where useful.
FAQ
Common questions
Show us where the workflow breaks.
Tell us which systems you use and where the process becomes manual, unreliable or difficult to maintain.
We connect what you already use. Start with one workflow.