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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)

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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 SaaS Founder

Weighted verdict

Runs a twelve-person SaaS that sells to companies in nine EU countries and is about to add a usage-based tier. Wants plans, trials and price changes without a developer sprint, reverse charge that is right without thinking about it, failed cards retried before they turn into churn, and a billing bill that does not grow faster than revenue.

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

Scored by The SaaS Founder

Panel median The SaaS Founder 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 SaaS Founder
Plans, pricing models & subscription lifecycle 3.5 of 5 3.5 of 5
Invoices & e-invoicing compliance 3.5 of 5 3.5 of 5
Cross-border VAT & tax handling 3 of 5 3.5 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 SaaS Founder

Plans, add-ons, discounts and coupons, trials, usage-based and hybrid pricing and a self-service customer portal with upgrades and downgrades are all documented, and the lifecycle is modelled end to end through named states from pending to expired, with scheduled actions, pause and trial flags. For our upcoming usage-based tier that covers most of what I need. We found no public information on quotes converting into subscriptions, multiple currencies and price books, metering through an API, or price changes rolled out to existing customers with grandfathering. 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 SaaS Founder

E-invoices go out as Factur-X 1.0.07 / ZUGFeRD 2.3 on the EN16931 profile for both invoices and credit notes, numbering is automatic with configurable prefixes and reset rules, and corrections happen by credit note with its own configurable number sequence while the original invoice stays unchanged. Invoices are generated and archived as PDFs, with DIN5008 compliance warnings on invoice formatting. We found no public information on XRechnung, Peppol sending, or GoBD-compliant unalterable archiving, which is what a German audit would ask me for. 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 SaaS Founder

VAT is determined automatically by customer country with preset normal rates for twenty top European countries, reverse charge applies to cross-border EU business customers when a VAT number is configured and the tax setting enables it, non-EU deliveries print at 0% with an exemption text, and German rate-change dates with service-period splitting come preset. Invoices follow the customer's language and exemption texts are translatable. We found no public information on VIES validation of VAT IDs, OSS reporting data, or US sales tax, and reverse charge relies on my own configuration rather than any validated check. 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 SaaS Founder

Failed payments are retried automatically on temporary errors with smart failure classification while dunning starts immediately on permanent ones, and I control the dunning plan's intervals and actions up to automatic cancellation and reminder emails — exactly the retry-before-churn behaviour I care about. One gateway covers fifty-plus European payment methods, SEPA direct debit includes return handling, a beta AI collections agent chases unpaid invoices and records promises to pay, and a receivables dashboard tracks collection performance. We found no public information on card account updaters, bank-transfer reconciliation, 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 SaaS Founder

MRR, ARR and churn sit on dashboards alongside billing, receivables and customer-health views, and the accounting handoff is properly German: DATEV export with SKR03 and SKR04 charts, posting-key overrides, automatic debtor IDs, revenue accounts per tax country, tax rate and currency, and delivery to SFTP, OneDrive or Google Drive on daily, weekly or monthly intervals. API documentation with subscription events and a Salesforce app round it out. We found no public information on deferred-revenue schedules or revenue recognition, a complete export of customer and subscription data, or data-warehouse sync. 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 SaaS Founder

The contracting entities are German — Frisbii Germany GmbH in Frankfurt and Frisbii Media GmbH in Kempten, with register numbers and German VAT IDs — and a data processing agreement is published in four languages with a German data protection officer, GDPR clauses and standard contractual clauses for third-country providers. However, the hosting location of the core billing platform is not described on the captured pages: only the Salesforce-hosted app names its host, the marketing website runs on a US WordPress provider, and we found no public information on a platform subprocessor list or security certifications. 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 SaaS Founder

Starter at €49/mo and Growth at €299/mo are published with a 0.95% charge on processed billing, seat counts, VAT treatment and cancellation terms, and the payment service standalone is €0.08 per transaction plus method-based fees — enough to compute cost on the two lower tiers. But Scale and Scale for Media are "Tailored pricing Talk to sales", the media plan's variable fees per subscription, transaction and users carry no figures, and merchant bank processing and customer/card import fees are referenced without amounts, so the real annual cost at the top end is not computable from public pages. 2

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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 →