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Billing & Invoicing

Frisbii (formerly billwerk+)

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Panel rating · 6 judges · How to read the stars

Category median

Sovereignty: 1 of 4 dimensions proven

0–5 in half steps. 5 means the rubric's top anchor is met on the evidence.

by Frisbii Germany GmbH · frisbii.com

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Frisbii (formerly billwerk+): AI-assisted analysis on whats-best.ai Frisbii (formerly billwerk+): AI-assisted analysis on whats-best.ai (dark)

Add ?theme=dark to the image address for dark backgrounds. The badge shows the category and the month of the latest evaluation, and EU-Made where that is the product’s provenance. It never shows a score.

Frisbii (formerly billwerk+) at a glance

Vendor
Frisbii Germany GmbH
Headquarters
Not stated on the vendor’s pages as of 26 Oct 2026
Data hosting
Not stated on the vendor’s pages as of 26 Oct 2026
Free plan
Not stated on the vendor’s pages as of 26 Oct 2026
Starting price
“Starter Launch your subscription billing – simple, fast, low complexity Integrated payment gateway Plans, add-ons, discounts & coupons Hoste...” (vendor’s words) source, captured 26 Oct 2026
Panel verdict
The AI panel rates Frisbii (formerly billwerk+) 3/5, the mean of 6 judges. Frisbii, formerly billwerk+, is the recurring-revenue platform of Frisbii Germany GmbH in Frankfurt. how scores are made
As of
Vendor pages captured 26 Oct 2026; evaluated by the panel 28 Oct 2026. all sources

Frisbii (formerly billwerk+) alternatives, European ones first →

Read this page as one judge. Each weighs the same scores by what they care about.

The Service-Business Owner

Weighted verdict

Runs an IT service company with two hundred maintenance contracts, hosting packages and monthly retainers, all billed to German businesses. Wants contract terms and price increases handled by the system, SEPA direct debit with mandates, e-invoices that public-sector customers accept, a DATEV export for the tax adviser, and customer data kept in Europe.

Same scores as the panel view — this lens weights them the way this judge cares.

Scored by The Service-Business Owner

Panel median The Service-Business Owner This judge’s scores over the panel median. Each label opens its reasoning below.
Scores per criterion, in stars out of 5
Criterion Panel median The Service-Business Owner
Plans, pricing models & subscription lifecycle 3.5 of 5 3 of 5
Invoices & e-invoicing compliance 3.5 of 5 3.5 of 5
Cross-border VAT & tax handling 3 of 5 3 of 5
Payment collection, dunning & portability 3 of 5 3.5 of 5
Revenue reporting & accounting handoff 3.5 of 5 3.5 of 5
European sovereignty 2 of 5 2 of 5

Plans, pricing models & subscription lifecycle

How this is scored

How the product models what is sold and to whom: plans, add-ons and price points, trials, upgrades and downgrades with proration, usage-based and seat-based pricing, contract terms and renewals, quotes, and a self-service portal where the customer changes or cancels their own subscription.

0 — No subscription model; recurring charges are set up by hand per customer or per invoice.

3 — A recurring invoice or a fixed plan that repeats on a schedule, but no proration, no trials, no add-ons and no usage component.

5 — Plans with add-ons and trials, upgrades and downgrades with proration, renewals and cancellations handled by the system, and a customer portal for viewing and changing the subscription.

8 — Usage-based, tiered, volume and seat-based pricing with metering through an API, contracts with minimum terms, ramps and notice periods, quotes that convert into subscriptions, multiple currencies and price books, and the subscription history kept per customer.

10 — The commercial model lives in the product: hybrid pricing (commitments, prepaid credits, overage) without custom code, price changes rolled out to existing customers with grandfathering, entitlements exposed to the selling application, and every change to a subscription versioned and attributed.

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The Service-Business Owner

Subscription lifecycle is genuinely modelled: seven states from pending through trial to expired, add-ons and one-off charges attached to a plan, usage-based and hybrid pricing on the higher plans, scheduled actions, and a self-service portal where customers upgrade or downgrade. We found no public information on proration, metering through an API, quote-to-subscription conversion or multi-currency price books, so it sits above basic recurring billing but short of full commercial-model machinery. 2 6 7

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Invoices & e-invoicing compliance

How this is scored

Whether the invoices the product issues are legally valid where the customer is: mandatory invoice content, sequential numbering, credit notes and cancellations instead of edits, retention and archiving to GoBD, and structured e-invoices (XRechnung, ZUGFeRD/Factur-X, Peppol) for business customers and public bodies.

0 — No invoices; the product charges cards or sends payment requests and the seller writes invoices elsewhere.

3 — PDF invoices from a template, but numbering, mandatory content, corrections and retention are not described.

5 — Invoices with sequential numbering and the mandatory content stated, credit notes and cancellations instead of edits, invoices in several languages and currencies, and a documented archive.

8 — Structured e-invoices to EN 16931 issued as XRechnung or ZUGFeRD/Factur-X and sent through Peppol, GoBD-compliant numbering and unalterable archiving stated, invoice data exportable for a tax audit, and the e-invoicing mandates in named EU countries addressed.

10 — Invoicing that stands up in any audit it may face: e-invoicing to public bodies and businesses in several EU countries with the channels named, clearance and reporting models (France, Italy, Poland) supported where they apply, a Verfahrensdokumentation or equivalent offered, and every invoice traceable to the subscription event that produced it.

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The Service-Business Owner

Invoices are numbered automatically with configurable prefixes and reset options, generated and archived as PDF, and corrections happen through credit notes carrying their own accounting number while the original invoice stays untouched; e-invoicing produces Factur-X 1.0.07 / ZUGFeRD 2.3 under the EN16931 profile for invoices and credit notes alike. We found no public information on XRechnung output, Peppol delivery or GoBD-conform archiving statements, which I would still need for public-sector customers. 8 9

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Cross-border VAT & tax handling

How this is scored

How the product gets tax right when the seller sells across borders: VAT rates per country and product type, reverse charge for business customers with VAT ID validation (VIES), the EU One-Stop-Shop, US sales tax — or, for a merchant of record, which tax liability it takes on in its contract and which it leaves with the seller.

0 — No tax handling; the seller types the rate on every invoice.

3 — One configurable VAT rate or a manual rate table, with no customer-location logic and no VAT ID check.

5 — Tax rates applied by customer country and status, reverse charge for business customers with a VAT ID field, and tax shown correctly on invoices and in reports.

8 — Automatic VAT per country and product type, VIES validation of VAT IDs, OSS reporting data, evidence of customer location kept, US sales tax through a named engine — or a merchant-of-record contract that states the tax liability it assumes and in which countries.

10 — Tax is discharged and evidenced: filings or filing data for OSS and the countries sold into, rate changes maintained by the vendor with a stated process, tax decisions per invoice explainable, and the division of liability between seller and vendor written into the terms.

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The Service-Business Owner

VAT is determined automatically by customer country, a standard tax setting ships with the normal rates of the 20 main European countries, reverse charge fires for EU business customers with a configured VAT number, non-EU customers are billed at 0% with a printed exemption text, and German rate changes with key dates and service-period-end logic are preset. We found no public information on VIES validation of VAT IDs, OSS reporting data or US sales tax, so those checks stay with my tax adviser. 10 11

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Payment collection, dunning & portability

How this is scored

How invoices turn into money: which payment providers and methods the product works with, SEPA direct-debit mandates, automatic retries and dunning sequences, payment reconciliation, collections handover — and whether the seller can move subscriptions and stored payment details to another provider.

0 — No collection; invoices are sent and payment is chased by hand.

3 — One built-in payment provider with card payments, and failed payments reported but not retried or chased.

5 — Several payment providers or methods including SEPA direct debit with mandates, automatic retries of failed payments, dunning emails with configurable steps, and payments matched to invoices.

8 — Gateway-agnostic collection across named providers, smart retries and card updaters, dunning with escalation and service suspension rules, bank-transfer reconciliation, a handover to a collection agency, and recovery reported.

10 — Collection is portable and measurable: subscriptions and payment tokens importable and exportable with a documented migration path, routing across providers per country or method, recovered revenue reported per dunning step, and no lock-in to the vendor's own payment service stated in the terms.

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The Service-Business Owner

SEPA direct debit via PPRO or EBICS with configurable return handling, retries that classify temporary versus permanent failures, a dunning plan I control interval by interval up to automatic cancellation, receivables and collection-performance dashboards, and a beta AI collections agent that contacts debtors and records promises to pay. We found no public information on SEPA mandate management, card updaters, a handover to a collection agency, or a documented migration path for subscriptions and payment tokens. 2 8 12 13 14

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Revenue reporting & accounting handoff

How this is scored

What finance gets out of billing: MRR, ARR, churn and cohort reporting, revenue recognition and deferred revenue, the export or sync to the accounting system and to DATEV, CRM and data-warehouse integrations, an API and webhooks, and a complete export of customer and subscription data.

0 — No reporting and no export beyond downloading individual invoices.

3 — A revenue overview and a CSV export of invoices, with no subscription metrics and no accounting integration.

5 — Subscription metrics (MRR, churn) on a dashboard, an export or sync to at least one named accounting tool, and a documented API with webhooks.

8 — Revenue recognition with deferred revenue schedules, a DATEV export or booking-ready journal for the ledger, native CRM and accounting integrations named, MRR movements explainable per customer, and a full data export documented.

10 — Billing is the system of record for revenue: recognition to IFRS 15 / ASC 606 stated, month-end close supported with reconciled reports, data-warehouse sync, audit trail of every financial event, and a complete export of customers, subscriptions and invoices that a successor system can import.

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The Service-Business Owner

The DATEV handoff is what my tax adviser wants: SKR03 or SKR04, EXTF or ASCII formats, posting key overrides, automatic debtor IDs, revenue accounts per tax country, rate and currency, and delivery to Google Drive, OneDrive or my own SFTP on daily, weekly or monthly cycles. MRR, ARR and churn sit on dashboards with retention KPIs and a Salesforce integration is named, but we found no public information on deferred-revenue schedules or a complete export of customer and subscription data. 2 10 14 15

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European sovereignty

How this is scored

Who the contracting entity and the parent company are, where customer, invoice and payment data are hosted, and who the subprocessors are (hosting, payment providers, tax engines, email delivery). Independently sourced by the sovereignty pipeline; billing data is personal and financial at once, so the whole chain counts, not only the database.

0 — Non-EU vendor and contracting entity, hosting unstated, subprocessors unnamed, and no data processing agreement offered.

3 — A privacy policy and a data processing agreement exist, but hosting location is unstated or non-EU and the subprocessors are not listed.

5 — EU hosting available and an EU contracting entity or EU representative, but parts of the chain (tax engine, email, analytics, support) run through non-EU providers without a stated safeguard.

8 — EU hosting on named infrastructure, EU contracting entity, subprocessors listed with their locations, a data processing agreement published, and security certifications (ISO 27001, SOC 2) stated.

10 — Sovereign end to end and evidenced: European ownership, entity, hosting and every subprocessor, data export and deletion documented, and certifications published with their scope rather than implied.

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The Service-Business Owner

I like contracting with Frisbii Germany GmbH in Frankfurt — a German commercial register entry, a German data protection officer, a published data processing agreement in four languages, and standard contractual clauses with third-country providers plus some processing on servers in Germany and the EU. But we found no public information on where the core billing platform hosts customer, invoice and payment data, on the group's ownership, or on product-chain subprocessors beyond Salesforce hosting one module, so I cannot confirm my customers' data stays in Europe. 3 4 5

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Pricing transparency not rated — the vendor publishes no price

How this is scored

Whether a buyer can compute the real annual cost from public pages alone: platform fee, percentage of billed revenue or per-invoice fees, which modules (revenue recognition, e-invoicing, tax, extra gateways) cost extra, overage above a revenue band, setup and minimum term, and the merchant-of-record fee where it applies.

0 — No public prices at all; every customer is a sales call.

3 — A starting price or a free tier exists, but how cost scales with billed revenue, invoices or modules is unclear.

5 — Tiers are public with their main inclusions and revenue bands, but at least one commonly needed piece (e-invoicing, revenue recognition, extra gateways, overage) is unpriced or "on request".

8 — Every tier priced publicly with its scaling rule (revenue percentage, per invoice, per subscriber), overage and add-ons listed, minimum term and VAT treatment stated.

10 — Complete price computability: annual cost derivable for a given billed revenue, invoice volume and module set, with every add-on, setup, support and payment or merchant-of-record fee and the cancellation and data-return terms published.

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The Service-Business Owner

Starter at €49/mo with one seat and Growth at €299/mo with up to five seats are public, both with a 0.95% charge on processed billing, VAT treatment stated, a twelve-month term on Growth promotions and three months' cancellation notice on Starter, and the payment service standalone is quoted at €0.08 per transaction. The Scale tiers are tailored pricing behind a sales conversation, and merchant bank processing and customer/card import fees are named without amounts, so I cannot compute my full annual cost from public pages alone. 2 5

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European sovereignty — proven facts

1 of 4 dimensions proven

Built only from facts shown on the vendor's own pages. A dimension we could not prove is left open, not scored as zero.

Ownership Not determined — uncited Report an error
Data residency Not determined ⚠ unverified — uncited Report an error
Subprocessors US CLOUD Act reach ⚠ unverified 0/2 pts 5 Report an error

Questions about Frisbii (formerly billwerk+)

Is Frisbii (formerly billwerk+) European?

Yes. whats-best.ai classifies Frisbii (formerly billwerk+) as EU-Made.

Where does Frisbii (formerly billwerk+) store data?

Not stated on the vendor’s pages as of 26 Oct 2026.

Does Frisbii (formerly billwerk+) have a free plan?

Not stated on the vendor’s pages as of 26 Oct 2026.

What are the best alternatives to Frisbii (formerly billwerk+)?

As of 28 Oct 2026, the panel rates Chargebee (3.5/5), Younium (3.5/5) and Stripe Billing (3.5/5) highest among the other 12 Billing & Invoicing products evaluated. Ratings that look equal are rounded to half stars; the order uses the unrounded rating, then the name. The highest-rated European alternative is Younium (EU-Made). Ratings are the AI panel’s opinion, formed from public evidence: how scores are made. The full list, with European products first: Frisbii (formerly billwerk+) alternatives.

Where this could be wrong

What we left out

A claim that does not survive our checks costs us the claim, not the page. This is what was taken off this one.

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Sources (15)

The pages every claim on this page was read from — each one checked, dated, and kept verifiable.

  1. 1 Vendor homepage frisbii.com Checked 26 Oct 2026 Details →
  2. 2 Pricing page frisbii.com Checked 26 Oct 2026 Details →
  3. 3 Privacy policy frisbii.com Checked 26 Oct 2026 Details →
  4. 4 Legal notice frisbii.com Checked 26 Oct 2026 Details →
  5. 5 Terms of service frisbii.com Checked 26 Oct 2026 Details →
  6. 6 Plans, pricing models & subscription lifecycle — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  7. 7 Plans, pricing models & subscription lifecycle — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  8. 8 Invoices & e-invoicing compliance — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  9. 9 Invoices & e-invoicing compliance — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  10. 10 Cross-border VAT & tax handling — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  11. 11 Cross-border VAT & tax handling — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  12. 12 Payment collection, dunning & portability — found from sitemap docs.frisbii.com Checked 26 Oct 2026 Details →
  13. 13 Payment collection, dunning & portability — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  14. 14 Revenue reporting & accounting handoff — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →
  15. 15 Revenue reporting & accounting handoff — found from sitemap help.frisbii.com Checked 26 Oct 2026 Details →