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Flat Invoice vs Faktwise

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Flat Invoice compared with Faktwise
Detail Flat InvoiceFaktwise logo Faktwise
What it doesSend the invoice. Skip the chasing. Automatic e-invoices for Shopify with ZUGFeRD, XRechnung, VAT checks and GoBD archive
StageNot given Not given
FoundedNot given Not given
Based inUS PT
Pricing modelFreemium Freemium
Pricing3 invoices per month free, then $2 per invoice. Pro plan: $9 per month or $79 per year for unlimited invoices. Edits, resends and reminders are free. Free plan: 25 invoices per month. Unlimited plan: $22 USD/month (approximately €19 depending on exchange rate) with 14-day free trial. Billed through Shopify in USD. No per-order fees.
Key features
  • Automatic payment reminders on day 3, 7 and 14
  • Late fee calculator with interest calculation
  • Ready-to-send reminder email templates
  • Direct client payments
  • Optional Stripe integration for card and bank payments
  • Free edits and resends
  • Free late fee calculator tool
  • Unlimited invoice drafts on free plan
  • ZUGFeRD 2.4 and XRechnung 3.0.2 e-invoice formats
  • 10-year GoBD-compliant archive with sequential invoice numbers
  • Source selection to choose which orders invoice automatically
  • VAT ID validation through VIES and reverse charge support
  • Support for Kleinunternehmer (German small-business scheme)
  • OSS (One-Stop-Shop) quarterly reports with BOP import file
  • Monthly export ZIP with PDFs, XMLs and CSV summary for accountant
  • Theme app block for B2B/public-sector buyers to enter VAT ID and Leitweg-ID
  • Validator-checked using KoSIT, Mustang and veraPDF
  • Customizable invoice email text in German and English with optional BCC
What makes it different
  • Never touches client payments or takes a percentage
  • Automatic reminders reduce payment chasing
  • Free late fee calculator included with service
  • Simple pricing with no setup fees
  • Supports multiple EU VAT schemes including reverse charge, OSS, and Kleinunternehmer in one app
  • Direct integration with Shopify cart for B2B buyer data capture
  • Automatic public-sector invoice routing with XRechnung Leitweg-ID support
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check40 −2 (down) since last check
Trust Flow (Majestic)02
Citation Flow (Majestic)1218
Referring domains (Majestic)37

6 details filled in for both companies.

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