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Rechnungskit
Rechnungskit vs. Sufio

Sufio alternative: Shopify invoices with DATEV bookings

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Rechnungskit issues the invoice for every Shopify order itself and carries it all the way into accounting: ZUGFeRD under EN 16931, cancellation invoices from refunds, a locked GoBD archive, payout reconciliation with fees and finished DATEV bookings. Sufio is strong on the invoice itself: its own number sequence, automatic credit notes on refunds and order edits, ZUGFeRD for German merchants (as a public beta) and, according to the provider, storage for up to ten years. The accounting export at Sufio is a CSV file; the provider does not mention DATEV booking records.

Sources checked: October 1, 2026 · Updated: October 1, 2026 · No guarantee of accuracy · Sources below the table

The short version

Rechnungskit fits if …

the invoice shouldn't be the end of the chain: your tax advisor gets booking records in DATEV format with a Beleglink, payouts from Shopify Payments, PayPal and others are broken down, plus OSS, the qualified VAT ID check and voucher logic.

Sufio fits if …

you want a very well-designed invoicing app for Shopify or BigCommerce, with quotes, pro forma invoices, payment reminders and packing slips, and your tax advisor builds the accounting from documents and bank statements.

On the invoice itself, Sufio and Rechnungskit are close: own number sequence, automatic credit notes, ZUGFeRD. The difference comes afterwards. Sufio ends at the document and a CSV file; Rechnungskit turns it into bookings, reconciles payouts and hands everything to DATEV.

Rechnungskit and Sufio in detail

Every row is backed by a source. Where something couldn't be confirmed from public sources, the table says so.

Feature comparison of Rechnungskit and Sufio, as of October 1, 2026
Feature RechnungskitSufio
E-invoicing
ZUGFeRD 2.x / Factur-X outgoing Yes ZUGFeRD 2.5 under EN 16931, every invoice Status: included Yes, beta2 ZUGFeRD 2.3 in the EN 16931 (COMFORT) profile for invoices and credit notes of German merchants, automatic and, according to the provider, as a public beta Status: included, see footnote 2
XRechnung for public-sector buyers Yes XRechnung 3.0 automatically as soon as the customer has a Leitweg-ID (public-sector routing ID) on file Status: included Not documented2 Sufio only mentions XRechnung as a format intended for public-sector buyers; Peppol sending is documented for Belgian merchants Status: no reliable source found, see footnote 2
Validation before sending Mandatory fields under §14 UStG, tax rates, format rules Yes every invoice before sending (Mustang/EN 16931) Status: included Not documented2 no documented scope of checks before sending Status: no reliable source found, see footnote 2
Receive and process e-invoices No deliberately out of scope. Rechnungskit creates outgoing invoices Status: not available Not documented1 Sufio only describes outgoing documents Status: no reliable source found, see footnote 1
Shop automation
Native shop and payment integrations no third-party tools Yes Shopify, WooCommerce and Shopware natively, Stripe/Mollie/PayPal/Unzer, own checkout link for one-time purchases and subscriptions without a shop, own push API Status: included Shopify, BigCommerce1 two shop systems; according to the listing compatible with POS, Recharge, Klaviyo and Stripe, payment reconciliation is not documented Status: limited, see footnote 1
Invoicing on the correct date of supply shipping date instead of payment date, automatically Yes from the shop's shipping event; for subscriptions, the service period comes from the billing period Status: included Optional, shipping date3 delivery date not set by default; optionally the date of the first fulfillment, but only if shipped before the invoice, otherwise by hand Status: limited, see footnote 3
Automatic cancellation invoices on refunds including partial refunds Yes to the cent, with its own correction document Status: included Yes3 according to the provider, creates additional invoices and credit notes "for every refund, return, and edited order" (mode with several documents per order) Status: included, see footnote 3
Payout reconciliation with fees Stripe, Mollie, PayPal and others as finished bookings Yes fees and payouts as bookings Status: included Not documented1 no reconciliation of payouts or fees documented Status: no reliable source found, see footnote 1
Tax compliance
OSS / EU distance selling Yes destination-country rates, monitoring of the €10,000 threshold, export Status: included Not documented4 taxes come from Shopify; Sufio does not describe an OSS procedure Status: no reliable source found, see footnote 4
EU tax rates updated automatically Yes monthly from the EU database TEDB, with change alerts Status: included Not documented4 no separate tax rate maintenance documented Status: no reliable source found, see footnote 4
Qualified VAT ID (USt-IdNr.) check with evidence archive Yes qualified check with the BZSt (Federal Central Tax Office), response archived for 8 years Status: included VIES, from Professional4 check via the EU's VIES service, only for EU numbers and from the Professional plan; matching name and address with the BZSt and archiving the result are not documented Status: limited, see footnote 4
Single- and multi-purpose vouchers (§3 (13) to (15) UStG) Yes own voucher and store-credit register Status: included Not documented1 single- and multi-purpose vouchers under § 3 (13) to (15) UStG are not mentioned Status: no reliable source found, see footnote 1
Deferred revenue (pRAP) / revenue recognition for subscriptions Yes pRAP for subscriptions and annual licenses Status: included Not documented1 no deferral documented Status: no reliable source found, see footnote 1
DATEV & archive
Finished DATEV booking records not just document images Yes EXTF for SKR03/SKR04, revenue + payments + fees; document images via Beleglink in the "Belegtransfer" package for Unternehmen online Status: included Not documented4 an export of document data as a CSV file is documented; Sufio names no DATEV format or booking records Status: no reliable source found, see footnote 4
GoBD archive with locking (Festschreibung) Yes WORM archive, SHA-256, locked from creation Status: included Provider's claim3 documents are "not modified" after issue, storage "for up to 10 years"; an explicit GoBD claim or audit certificate is not mentioned in the sources checked Status: limited, see footnote 3
Free access for your tax advisor Yes own tax advisor portal, documents read-only Status: included Not documented1 no separate access for tax advisors documented Status: no reliable source found, see footnote 1
Accounting & operations
VAT return (UStVA) / cash-basis accounts (EÜR) / direct ELSTER filing EC Sales List (ZM) import files are covered separately ZM data ZM import file yes; UStVA, EÜR and direct ELSTER filing stay with your tax advisor Status: limited –1 invoicing app, not accounting; UStVA and EÜR stay with your tax advisor, same as Rechnungskit Status: not applicable, see footnote 1
Entry price from €9 base fee + tiered price per document; free to test in sandbox mode Status: included from $7/month5 Starter up to 15 invoices; Growth $19 up to 50, Professional $49 up to 5,000, Premium $129 unlimited; sending into e-invoicing networks $0.05 per document Status: note, see footnote 5
API for your own systems Yes push API in every plan Status: included Not documented1 no public API documentation found Status: no reliable source found, see footnote 1

E-invoicing

ZUGFeRD 2.x / Factur-X outgoing
Rechnungskit Yes ZUGFeRD 2.5 under EN 16931, every invoice Status: included
Sufio Yes, beta2 ZUGFeRD 2.3 in the EN 16931 (COMFORT) profile for invoices and credit notes of German merchants, automatic and, according to the provider, as a public beta Status: included, see footnote 2
XRechnung for public-sector buyers
Rechnungskit Yes XRechnung 3.0 automatically as soon as the customer has a Leitweg-ID (public-sector routing ID) on file Status: included
Sufio Not documented2 Sufio only mentions XRechnung as a format intended for public-sector buyers; Peppol sending is documented for Belgian merchants Status: no reliable source found, see footnote 2
Validation before sending
Mandatory fields under §14 UStG, tax rates, format rules
Rechnungskit Yes every invoice before sending (Mustang/EN 16931) Status: included
Sufio Not documented2 no documented scope of checks before sending Status: no reliable source found, see footnote 2
Receive and process e-invoices
Rechnungskit No deliberately out of scope. Rechnungskit creates outgoing invoices Status: not available
Sufio Not documented1 Sufio only describes outgoing documents Status: no reliable source found, see footnote 1

Shop automation

Native shop and payment integrations
no third-party tools
Rechnungskit Yes Shopify, WooCommerce and Shopware natively, Stripe/Mollie/PayPal/Unzer, own checkout link for one-time purchases and subscriptions without a shop, own push API Status: included
Sufio Shopify, BigCommerce1 two shop systems; according to the listing compatible with POS, Recharge, Klaviyo and Stripe, payment reconciliation is not documented Status: limited, see footnote 1
Invoicing on the correct date of supply
shipping date instead of payment date, automatically
Rechnungskit Yes from the shop's shipping event; for subscriptions, the service period comes from the billing period Status: included
Sufio Optional, shipping date3 delivery date not set by default; optionally the date of the first fulfillment, but only if shipped before the invoice, otherwise by hand Status: limited, see footnote 3
Automatic cancellation invoices on refunds
including partial refunds
Rechnungskit Yes to the cent, with its own correction document Status: included
Sufio Yes3 according to the provider, creates additional invoices and credit notes "for every refund, return, and edited order" (mode with several documents per order) Status: included, see footnote 3
Payout reconciliation with fees
Stripe, Mollie, PayPal and others as finished bookings
Rechnungskit Yes fees and payouts as bookings Status: included
Sufio Not documented1 no reconciliation of payouts or fees documented Status: no reliable source found, see footnote 1

Tax compliance

OSS / EU distance selling
Rechnungskit Yes destination-country rates, monitoring of the €10,000 threshold, export Status: included
Sufio Not documented4 taxes come from Shopify; Sufio does not describe an OSS procedure Status: no reliable source found, see footnote 4
EU tax rates updated automatically
Rechnungskit Yes monthly from the EU database TEDB, with change alerts Status: included
Sufio Not documented4 no separate tax rate maintenance documented Status: no reliable source found, see footnote 4
Qualified VAT ID (USt-IdNr.) check with evidence archive
Rechnungskit Yes qualified check with the BZSt (Federal Central Tax Office), response archived for 8 years Status: included
Sufio VIES, from Professional4 check via the EU's VIES service, only for EU numbers and from the Professional plan; matching name and address with the BZSt and archiving the result are not documented Status: limited, see footnote 4
Single- and multi-purpose vouchers (§3 (13) to (15) UStG)
Rechnungskit Yes own voucher and store-credit register Status: included
Sufio Not documented1 single- and multi-purpose vouchers under § 3 (13) to (15) UStG are not mentioned Status: no reliable source found, see footnote 1
Deferred revenue (pRAP) / revenue recognition for subscriptions
Rechnungskit Yes pRAP for subscriptions and annual licenses Status: included
Sufio Not documented1 no deferral documented Status: no reliable source found, see footnote 1

DATEV & archive

Finished DATEV booking records
not just document images
Rechnungskit Yes EXTF for SKR03/SKR04, revenue + payments + fees; document images via Beleglink in the "Belegtransfer" package for Unternehmen online Status: included
Sufio Not documented4 an export of document data as a CSV file is documented; Sufio names no DATEV format or booking records Status: no reliable source found, see footnote 4
GoBD archive with locking (Festschreibung)
Rechnungskit Yes WORM archive, SHA-256, locked from creation Status: included
Sufio Provider's claim3 documents are "not modified" after issue, storage "for up to 10 years"; an explicit GoBD claim or audit certificate is not mentioned in the sources checked Status: limited, see footnote 3
Free access for your tax advisor
Rechnungskit Yes own tax advisor portal, documents read-only Status: included
Sufio Not documented1 no separate access for tax advisors documented Status: no reliable source found, see footnote 1

Accounting & operations

VAT return (UStVA) / cash-basis accounts (EÜR) / direct ELSTER filing
EC Sales List (ZM) import files are covered separately
Rechnungskit ZM data ZM import file yes; UStVA, EÜR and direct ELSTER filing stay with your tax advisor Status: limited
Sufio –1 invoicing app, not accounting; UStVA and EÜR stay with your tax advisor, same as Rechnungskit Status: not applicable, see footnote 1
Entry price
Rechnungskit from €9 base fee + tiered price per document; free to test in sandbox mode Status: included
Sufio from $7/month5 Starter up to 15 invoices; Growth $19 up to 50, Professional $49 up to 5,000, Premium $129 unlimited; sending into e-invoicing networks $0.05 per document Status: note, see footnote 5
API for your own systems
Rechnungskit Yes push API in every plan Status: included
Sufio Not documented1 no public API documentation found Status: no reliable source found, see footnote 1
Sources & footnotes
  1. 1. Shopify App Store, listing "Sufio: Professionelle Rechnung", checked on October 1, 2026: 4.9 stars from 467 reviews, in the App Store since July 22, 2013, compatible with checkout, customer accounts, POS, Klaviyo, Recharge, SparkLayer, Stripe, Weglot and Zapiet; plus sufio.com/de (Shopify and BigCommerce).
  2. 2. Sufio help ZUGFeRD e-invoices for Shopify stores in Germany: "ZUGFeRD 2.3 format in the EN16931 (COMFORT) profile", "currently in public beta"; announcement of 18.12.2024. Peppol: Belgian merchants. Checked on October 1, 2026.
  3. 3. sufio.com/shopify/invoice: credit notes "for every refund, return, and edited order", "documents are not modified after they are issued", "secure storage for your invoices for up to 10 years"; help on delivery dates and numbering. Checked on October 1, 2026.
  4. 4. Sufio help capturing and validating VAT IDs (VIES, "only on the Professional and higher plans"), CSV export and FAQ, checked on October 1, 2026.
  5. 5. sufio.com/de/preise, checked on October 1, 2026; prices in US dollars, monthly payment. The Rechnungskit price comes from the pricing curve on rechnungskit.de/preise (€9.00 base fee + €66.50 usage for 600 documents).
  6. Information from the provider's website, App Store listing and help center, last checked on October 1, 2026; prices in US dollars as shown in the Shopify App Store.
  7. Rows marked "Not documented" mean we found no reliable public source, not that the feature is missing.
  8. Rechnungskit information reflects the current product; items marked "Planned" are not available yet.
  9. Legal basis for the rows and sections (German law): mandatory invoice details § 14 (4) UStG, e-invoicing § 14 (1) and (2) UStG with the transition rules in § 27 (38) UStG, small-amount invoices § 33 UStDV, vouchers § 3 (13) to (15) UStG, OSS threshold § 3c (4) UStG and filing § 18j UStG, VAT ID confirmation § 18e UStG, intra-EU supply § 6a UStG, tax arising in the filing period of the supply § 13 (1) no. 1 (a) UStG, retention § 14b (1) UStG and § 147 (3) AO, deferred revenue § 250 (2) HGB, archive GoBD, BMF letter of 28.11.2019.

All information from publicly available sources, checked October 1, 2026. Providers' features and prices can change. Please report mistakes to support@rechnungskit.de. How we rate is explained in How we compare.

When is Sufio the better choice?

Rechnungskit doesn't do everything. In these cases, Sufio is the more honest recommendation.

You need quotes, pro forma invoices and payment reminders

Besides invoices and credit notes, Sufio creates quotes, pro forma invoices, packing slips and payment reminders. Rechnungskit's focus is invoices and correction documents from your shop and payment provider.

You sell on BigCommerce

Sufio exists for Shopify and BigCommerce. Rechnungskit connects to Shopify, WooCommerce and Shopware, not BigCommerce.

Design and languages come first

Templates, fonts and invoices in more than 40 languages: Sufio offers more on design and language choice. Rechnungskit prints invoices in six languages.

Your tax advisor books from documents anyway

If your tax advisor books from invoice PDFs and bank statements and doesn't need finished booking records, Sufio gives you a solid invoicing process for up to 50 invoices a month at $19.

What Rechnungskit does differently

Invoicing

Invoicing on the correct date of supply

Shipped goods are invoiced on the shipping date, not the payment date. It sounds like a detail, but it decides which period the revenue lands in.

Date of supply (Leistungsdatum) from the shop's shipping event
Small-amount invoices automatically under §33 UStDV
Handover to DATEV in the right period
Tax compliance

VAT ID check with evidence archive

Qualified check with the BZSt (Federal Central Tax Office) including company name, city, postcode and street. The response is archived unchanged for eight years and linked to the individual invoice.

Qualified BZSt check instead of a simple format check
Response linked to the invoice and delivery date
No tax-exempt invoice without a usable check
Accounting

DATEV bookings with linked documents

Your tax advisor gets finished EXTF booking records, not just a folder of PDFs. Revenue, payments, fees and payouts are already matched, and every invoice booking carries a Beleglink to its document image in the "Belegtransfer" package for Unternehmen online.

EXTF bookings for SKR03 and SKR04
Document image attached to the booking via Beleglink
Fees and payouts already matched
Your tax advisor downloads them directly

Price comparison

List prices net per month, as of October 1, 2026. Discounts and promotions are not included.

Rechnungskit List price
from €9 / month net + tiered price per document
Free to test in sandbox mode; billing starts at go-live
After that, a €9 base fee plus €0.15 to €0.03 per document
OSS, ZM, DATEV, GoBD archive and every feature always included
Self-service signup with no waiting list, up and running in minutes
Cancel monthly, no setup fee
Sufio By invoices
$7 to $129 / month, depending on the invoice quota
Starter $7 up to 15 invoices, Growth $19 up to 50, Professional $49 up to 5,000, Premium $129 unlimited; Sufio Plus from $499
VAT ID check via VIES only from Professional
Sending into e-invoicing networks such as Peppol $0.05 per document in all plans
14-day free trial, cancel monthly
Source: sufio.com/de/preise and Shopify App Store, as of October 1, 2026
Worked example
600 documents a month: at Rechnungskit that is a €9.00 base fee plus €66.50 usage, including e-invoicing, GoBD archive and DATEV bookings. At Sufio you need the Professional plan (up to 5,000 invoices) at $49 a month, ZUGFeRD for German merchants included. DATEV bookings and payout reconciliation are not included; your tax advisor books from documents and CSV.
Rechnungskit
€75.50
Sufio
$49

Switching in three steps

1
Bring your data over

Orders and payments from your connected sources are pulled in, and your invoice number sequence continues. Old documents stay available in your previous system; Rechnungskit doesn't import invoices created elsewhere.

2
Test in parallel

Both systems run side by side for one billing period. You compare documents and bookings before anything goes live.

3
Switch over

Sending is switched over and your tax advisor gets the new export access. The old system stays in place as an archive.

FAQ

For invoices and credit notes from Shopify, yes. Rechnungskit creates them automatically too, with its own number sequence and ZUGFeRD, and carries them through to the DATEV booking including payout reconciliation. Quotes, pro forma invoices and packing slips remain Sufio's territory, as do shops on BigCommerce.

Yes, and that's the usual way to switch. You run both systems in parallel for one billing period and compare documents and bookings before you switch over.

They stay where they are. Rechnungskit doesn't import or archive invoices created elsewhere; you keep meeting your retention duty for old documents (eight years under § 14b (1) UStG and § 147 (3) AO) in your previous system. What Rechnungskit can pull in are past orders and payments from your connected shops and payment providers, which then become new, validated invoices. For the number sequence, you set the number Rechnungskit continues from, so nothing overlaps with your old documents.

Documents are stored tamper-proof and unchangeable for eight years for as long as your account exists (WORM archive with checksums). Eight years is the retention period for invoices and accounting records (§ 14b (1) UStG, § 147 (3) AO); the requirements for the archive are set out in the GoBD. You can export them at any time, and for 90 days free of charge after you cancel. The final assessment of your process documentation (Verfahrensdokumentation) is up to your tax advisor.

Yes. For merchants based in Germany, Sufio has embedded structured data under ZUGFeRD 2.3 in the EN 16931 profile in invoices and credit notes since January 1, 2025, automatically and in all plans. Sufio itself calls this a public beta. Sufio doesn't document XRechnung or sending via Peppol to Germany. Rechnungskit creates ZUGFeRD 2.5 and validates every invoice before sending; XRechnung is created as soon as the customer has a Leitweg-ID on file.

An export of document data as a CSV file is documented. Sufio doesn't name a DATEV format or finished booking records. Rechnungskit passes revenue, payments and fees on as EXTF bookings for SKR03 or SKR04, each invoice booking with a Beleglink, and reconciles your payment provider's payouts.

For a trial period, yes; in day-to-day operation, the invoice should come from one system. Run both in parallel for a month, compare documents and bookings, then switch off invoice sending in Sufio. Your customers then get exactly one document per order. Existing Sufio invoices stay in Sufio; Rechnungskit doesn't import invoices created elsewhere.

From the providers' publicly available sources, checked on October 1, 2026, with footnotes for each row. Where we found no reliable source, the table says "Not documented". If you spot a mistake, write to support@rechnungskit.de and we'll correct it and re-date the page.

Related reading

More comparisons

Rechnungskit is not a tax advisory or law firm. This article explains general principles and does not replace advice from a tax advisor (Steuerberater, § 5 StBerG) or a lawyer (§ 3 RDG). Rechnungskit is built for businesses based in Germany and prepares documents, tax rates and bookings automatically. How your specific case is treated remains your decision, ideally together with your tax advisor or a lawyer.

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