Read-only connection
Frisbii keeps handling billing, payments, and the VAT on your invoices. Kintsugi reads your Frisbii data to calculate what you owe, monitor exposure, register you where you owe, and file and remit your returns.
Kintsugi reads your Frisbii Billing invoices and credit notes to show where you owe sales tax, then registers you, files your returns, and remits on schedule.
Free exposure monitoring · Filing from $75 · No per-transaction fees
Rated 4.6/5 on G2 (60 reviews) · 7,000+ customers

Trusted by 7,000+ businesses
Kintsugi classifies your plans and add-ons and calculates what you owe in each US jurisdiction from your Frisbii invoices and credit notes, alongside the VAT Frisbii already recorded.
Your Frisbii revenue is tracked against every state's economic nexus threshold, so you hear about it before it becomes back tax.
Kintsugi registers you where you owe, files every return, and remits on schedule, from $75 per filing or registration.
Frisbii keeps running your subscriptions, invoicing, and payments. Kintsugi reads your customers, plans, add-ons, invoices, and credit notes to work out where you owe and file on time. It doesn't change anything in Frisbii.

Create a private API key in Frisbii and paste it into Kintsugi. Kintsugi checks the key, imports your invoice history, and picks up new invoices and credit notes about every 16 minutes after that.
Kintsugi classifies each plan and add-on for taxability and calculates what you owe in every US state from your Frisbii invoices, with discounts and credit notes applied line by line.
Kintsugi registers you where you owe, files every return on schedule, and remits the tax, with the reporting you need to stay audit-ready.
| Synced | What Kintsugi does with it |
|---|---|
| Customers | Imported with name, email, and address. A VAT number is stored as the customer's tax ID. |
| Plans and add-ons | Imported as products and classified for taxability, so exposure and liability are built on the right foundation. Retired plans stay on file so older invoices still map to them. |
| Invoices and line items | Used for nexus tracking and to calculate what you owe, at the post-discount amount on each line. Invoices are imported once they're issued. |
| Credit notes | Linked to the invoice they credit and marked full or partial, so filings reflect what you actually kept. |
Frisbii keeps handling billing, payments, and the VAT on your invoices. Kintsugi reads your Frisbii data to calculate what you owe, monitor exposure, register you where you owe, and file and remit your returns.
Keep billing US customers from Frisbii and let Kintsugi track where those sales create US sales tax obligations, without exporting invoices.
Get alerted when your Frisbii revenue crosses a state's economic nexus threshold, before it becomes back tax.
Connect each Frisbii account with its own API key. Each account syncs on its own, so you can monitor and file for every entity from Kintsugi.
Frisbii Billing is a European subscription billing platform. You use it to manage plans, add-ons, and pricing, generate invoices and credit notes, collect payments, run dunning, and report on recurring revenue.
Frisbii's tax settings apply VAT rates based on your customer's country, including EU reverse charge. Its tax documentation doesn't cover US sales tax nexus monitoring, state registration, or filing and remitting returns.
This is where Kintsugi helps. Kintsugi reads your Frisbii invoices to track economic nexus across every US state and calculate what you owe, then registers, files, and remits returns for you. Monitoring is free, with transparent pricing and no per-order fees.
Jared Stark
Founder of Incendico Fire Alarm Store
The setup was incredibly seamless and much faster than I expected, with clear guidance throughout the process. What really stands out is their support since it is easy to get in touch with someone quickly and the team is knowledgeable and actually helpful when you have questions.

April Walford
Operations Manager at JMXi
They corrected errors in our past returns, enrolled us quickly and efficiently, filed everything on time, and thoroughly researched any questions or concerns we had. Their customer service is excellent.

Mo Hartman
Staff Accountant at Searchspring
Having the visibility on the dashboard has been extremely helpful and the ease of being able to approve. It is very user-friendly and I can see everything I need in one place.