Legally valid e-invoices in one minute
The EU e-invoicing mandates are here. Invonio turns a simple form into a compliant ZUGFeRD, Factur-X or XRechnung invoice — validated, delivered and archived. No bookkeeping package required.
Net
€900.00
VAT
€171.00
Total
€1,071.00
Illustrative example — every invoice you send goes through this same validation.
Free e-invoicing usually means you're the funnel
Most 'free' invoicing apps are bait for a tax subscription — cheap in year one, a steep bill in year two. Invonio just does invoicing, at one honest price.
- Free e-invoicing is the bait for a tax/bookkeeping subscription.
- Price jumps sharply once you're locked in (often 2-3x in year two).
- Push you toward accounting services you never asked for.
- Your data is the product — that's how "free" gets paid for.
- One honest annual price. No free tier, no bait-and-switch.
- Founding members lock their price for life — no surprise increases.
- We do compliant e-invoicing and nothing else.
- Export or delete your data in one click, any time.
From setup to sent, start to finish
We reduced a compliance headache to a clear, transparent flow.
1. Set up your business
Your company details, VAT ID and IBAN — the seller profile stamped on every invoice.
2. Create an invoice
A simple form with live totals — VAT grouped by rate, discounts handled correctly.
3. Validated automatically
Every invoice is checked against the official EN 16931 business rules before it leaves.
4. Send & archive
Delivered by email or Peppol, and kept in a compliant long-term archive automatically.
Built for the new rules, not retrofitted
Germany and France side by side — XRechnung and Factur-X from day one, ready for every deadline.
Valid by construction
Every invoice is checked against the official EN 16931 business rules before it leaves — not after your customer's system rejects it.
Send and receive
Deliver by email or the Peppol network. Incoming e-invoices land in your inbox as a readable document, not a wall of XML.
Compliant archive
Long-term, tamper-proof storage for every document — exactly what the tax office expects to see.
Live PDF preview
See the Factur-X PDF exactly as your customer will — before you send it, right in the browser.
Credit notes & corrections
A sent invoice is legally locked — correct it the right way with a linked credit note, not a silent edit.
REST API included
Everything in the app is built on the same API you can automate against — no separate integration tier.
Made for the smallest businesses
If your invoices come out of Word or Excel today, Invonio is your shortest path to compliance.
Freelancers
Freiberufler, micro-entrepreneurs and contractors who need compliant invoices without learning tax software.
Small businesses
A handful of invoices a month, every one of them legally valid — with an audit-ready archive built in.
Growing teams
A REST API, webhooks and bulk sending are part of the same product when you're ready for them. No migration, just an upgrade.
One tool, every EU e-invoicing format that matters.
Built on the exact compliance standards tax authorities and your customers' systems expect — not a best-effort approximation.
4
Compliant formats: ZUGFeRD, Factur-X, XRechnung, Peppol
2
Countries covered at launch — Germany and France
10
Years every invoice stays in your compliant archive
1
API powering the web app, mobile app and integrations
One honest price. No free-to-paid bait.
A card is always required, so you know exactly what you signed up for.
Founding Price
€24/year
Locked to your account for life.
Business
€29/month
For accountants & high volume
Questions people ask
Ready before the deadline
Lock the founding price while seats last — one honest annual price, no free-tier bait, no surprise bills.