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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 Billing Engineer

Weighted verdict

Wires billing into the product and gets paged when a webhook goes missing. Wants a documented API for usage events, idempotent webhooks, entitlements the app can read, a sandbox that behaves like production, and a migration path that moves subscriptions and payment tokens out again if the company outgrows the tool.

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

Scored by The Billing Engineer

Panel median The Billing Engineer 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 Billing Engineer
Plans, pricing models & subscription lifecycle 3.5 of 5 3.5 of 5
Invoices & e-invoicing compliance 3.5 of 5 3 of 5
Cross-border VAT & tax handling 3 of 5 3 of 5
Payment collection, dunning & portability 3 of 5 3 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 Billing Engineer

The lifecycle is real engineering: seven subscription states including trial and on-hold, sub-state flags exposed via API, a named event set covering renewal, cancellation, uncancelled and pricing changes, plus plans with add-ons and credits, usage-based and hybrid pricing, three documented upgrade and downgrade routes, scheduled actions, contract management and a self-service customer portal. We found no public information on proration, metering usage through an API, quotes that convert into subscriptions, or multiple currencies and price books, which is what keeps this below the level of a full commercial-model engine. 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 Billing Engineer

Invoices are generated and archived automatically with configurable number prefixes and monthly, yearly or no reset, corrections happen as credit notes with their own number sequence while the original invoice stays untouched, and a refund automatically creates a credit note. Enabling e-invoicing produces Factur-X 1.0.07 / ZUGFeRD 2.3 hybrid PDFs on the EN16931 profile for invoices and credit notes alike, with DIN 5008 formatting warnings and per-country exemption texts. We found no public information on XRechnung, delivery through Peppol, GoBD-compliant numbering and unalterable archiving, or the e-invoicing mandates of named EU countries. 8 9 10

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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 Billing Engineer

VAT is determined automatically by customer country with a standard setting covering the normal rates of the twenty principal European countries, reverse charge applies to cross-border EU customers that have a VAT number on record, and zero-rate exemption texts exist for reverse charge, non-EU sales and domestic VAT groups, with the German 2020/2021 rate changes preset and automatic splitting of continuous services at rate-change dates. Two things cap it: we found no public information on validation of VAT IDs against VIES, and the captured pages state that EU business-to-consumer invoices simply assume you take part in the One-Stop-Shop procedure rather than describing OSS reporting data; we also found no public information on US sales tax. 10 11 15

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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 Billing Engineer

Dunning is properly engineered: smart failure classification retries temporary errors such as an exceeded credit limit and starts dunning immediately on permanent ones like an expired card, plans give full control over intervals and actions and can end in subscription cancellation, SEPA direct debit is supported with configurable return handling, and a beta AI collections agent contacts customers, answers replies and records promises to pay while the payments and receivables dashboards track failed transactions and collection performance. Gateway choice is documented only as Frisbii or partner payment gateway options, and we found no public information on card updaters, bank-transfer reconciliation, handover to a collection agency, or a migration path that moves subscriptions and payment tokens to another provider. 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 Billing Engineer

Finance gets MRR, ARR and churn dashboards with retention KPIs and an AI forecasting add-on, plus a genuinely deep DATEV handoff: SKR03 or SKR04 chart selection, posting-key overrides, revenue accounts configurable per tax country, rate and currency with separate VAT accounts, automatic debtor IDs, EXTF or ASCII formats, and monthly, weekly or daily exports delivered to SFTP, Google Drive or OneDrive, alongside a documented API with subscription events and a Salesforce integration. We found no public information on deferred revenue schedules or recognition stated to IFRS 15 / ASC 606, MRR movements explained per customer, data-warehouse sync, or a complete export of customers, subscriptions and invoices that a successor system could import. 7 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 Billing Engineer

The contracting entities are German — Frisbii Germany GmbH in Frankfurt, registered in the commercial register, plus Frisbii Media GmbH in Kempten — a data processing agreement is published in English, German, Danish and French with a German data protection officer, and the website's subprocessors are listed with locations and safeguards such as standard contractual clauses and Data Privacy Framework listing. However, the captured pages leave the hosting of the core billing platform and its data residency unconfirmed — only the Salesforce-deployed product is described, hosted by Salesforce as a subcontractor — and we found no public information on security certifications such as ISO 27001 or SOC 2. 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 Billing Engineer

Starter at €49/mo and Growth at €299/mo are published with seat counts, a 0.95% charge on processed billing, VAT stated as additional to the advertised plan price, and cancellation terms of three months' notice on Starter. Both Scale tiers are quoted as tailored pricing with a talk-to-sales path, and merchant bank processing fees, per-payment-method fees and customer/card import fees are referenced but not quantified on the captured pricing page, so a real annual cost is not computable for larger volumes. 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.

Do you know more about Frisbii (formerly billwerk+)? Tell us Report an error on this page

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 →