Invoices out.
Money in.
Ametrus brings quotes, invoicing and dunning together in one clear system — built for German SMEs. And for facility services: from the site to the paid invoice.
Everything in. Nothing twice.
Six building blocks, one system — from the first quote to the paid invoice.
Invoicing & e-invoice check
Quote, order, invoice, credit note — in one flow, with gap-free numbering. A required-field check to EN 16931 blocks sending until everything is complete.
Customers & sites
Every customer with their sites, contacts and payment terms — including the Leitweg-ID for public-sector clients.
Receivables & dunning
Due dates at a glance, payment reminders by email — traceable, and with no tracking pixels.
Price book & CSV import
Maintain services and prices in one place. Customers and price lists come in via CSV import — with a dry run before anything is saved.
Team & assignments
Add employees, assign them to sites, control access — six roles, cleanly separated.
Every change logged. Every tenant isolated.
An append-only audit log records every action. Your data is tenant-isolated and hosted in Germany — GDPR-compliant with a DPA.
- Invoice RE-2026-0041 sent
- Payment recorded · €2,150.00
- Price list imported · 38 items
From the site to the paid invoice.
Customer, site, contract, assignment, invoice, payment — one continuous flow instead of three programs.
- 1
Customer
Master data, contacts and payment terms in one place.
- 2
Site
Every property with its address and agreed services.
- 3
Contract
Recurring services as the template for the invoice.
- 4
Assignment
Assign the team to the site, document the work.
- 5
E-invoice
Prefilled from the contract, checked to EN 16931.
- 6
Payment
Receivables at a glance, reminders by email.
Standard, not an add-on.
The requirements of German finance leaders are built into Ametrus — not bolted on.
Ready in one afternoon
Import your master data
Bring in customers and price lists via CSV — with a dry run before anything is saved.
Set up sites & contracts
Record your properties, store recurring services as contracts, assign your team.
Send your first invoice
Prefilled from the contract, checked to EN 16931, sent as a PDF — free for 7 days.
What's coming next.
In progress — not available yet. We're building Ametrus out step by step.
Banking & matching
Connect your accounts — payments match themselves to open invoices.
XRechnung & ZUGFeRD export
The EN 16931 check is live today. Next up: exporting invoices as XRechnung or ZUGFeRD files.
Scan receipts
Photograph a receipt — amount, date and tax rate are recognised and suggested.
DATEV export
A clean handover to your tax advisor — no double entry.
Ametrus Assist
AI you approve — not the other way round. Suggestions for recurring invoices and deadlines; nothing happens without your confirmation.
Automated billing runs
Bill recurring contracts in batches — with your approval before anything is sent.
Frequently asked questions
You bring over customers and price lists via CSV import — with a dry run before anything is saved. Most teams are ready in one afternoon.
A required-field check to EN 16931 blocks sending until every detail is complete — including the Leitweg-ID for public authorities. Export as XRechnung and ZUGFeRD files is on the roadmap.
Yes — it's built for them. Customers, sites, contracts and team assignments are part of the system, not an add-on. Invoices are created straight from the contract for a site.
Register with your email address and try Ametrus free for 7 days — no credit card required. After that, you decide whether to continue.
In Germany only — on AWS in the eu-central region. Processing is GDPR-compliant with a data-processing agreement.
Today you hand over invoices as PDFs, and every change is traceable in the GoBD audit log. DATEV export is on the roadmap.
Less bookkeeping. More business.
Try Ametrus free for 7 days — no credit card. Or request a short demo.