Tax compliance
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How Kintsugi and Quaderno compare on price, filing, country coverage, e-invoicing and integrations, built from each vendor’s own pages. Pick any two tools to compare them.
Showing Kintsugi compared with Quaderno.
Facts checked on against each vendor’s public pages.
Pay-per-filing sales tax
Kintsugi monitors nexus for free and, on its Starter plan, charges per registration or filing in the US and Canada. Custom monthly plans add EU, UK and other VAT and GST, real-time calculation and the API.
Choose Kintsugi if you’re one of these:
Tax automation for small businesses
Quaderno calculates sales tax, VAT and GST, issues invoices and tracks thresholds across stores and payment processors. Registration and filing are sold separately through local partners, at fees listed in its help centre.
Choose Quaderno if you’re one of these:
Kintsugi is free to start and charges per filing (Free monitoring; Starter is $75 per registration or filing). Kintsugi charges for each registration and return, so the bill grows with every state and filing. Quaderno starts at $29 a month (Hobby: 25 transactions a month, one jurisdiction). Having one US state’s returns filed costs $75 per filing with Kintsugi. Having one US state’s returns filed costs $70 a month with Quaderno.
Every row comes from the vendor’s own pricing page, help centre or docs. “Not stated” means the vendor doesn’t say publicly, not that the feature is missing.
| Criterion | Kintsugi | Quaderno |
|---|---|---|
| Overview | ||
| Type of tool | Pay-per-filing sales taxFree nexus monitoring, then pay per filing | Tax automation for small businessesTax calculation and invoicing for small online businesses |
| Built for | ||
| Countries covered | 100+ countriesMonitoring on every plan; filing on custom plans | Not stated12,000+ tax jurisdictions |
| Head office | United States | Spain |
| Founded | 2022Independent, venture-backed (Vertex is an investor) | 2014Part of Visma since 2023 |
| Pricing | ||
| Starting price | $0 a monthFree monitoring; Starter is $75 per registration or filing | $29 a monthHobby: 25 transactions a month, one jurisdiction |
| Pricing model | Fee per filing | Flat monthly plan |
| One price covers every state and country | NoPriced per filing | PartialThe Hobby plan covers one jurisdiction |
| Free plan | Yes | No |
| Free trial | Free plan instead | Yes |
| Month to month | Yes | Yes |
| Prices published | Partial | Yes |
| Filing: one US state | $75 per filingStarter plan, no monthly fee | $70 a monthNo setup fee |
| Filing: one country | Quote onlyCustom plans only | €100 a monthUK, EU OSS, Canada, Australia and NZ |
| Registration: one US state | $75 one-offUS and Canada, on Starter | Quote only |
| Registration: one country | Custom plans only | €600 one-off€300 to take over an existing registration |
| Tax coverage | ||
| US sales tax | Yes | YesEvery state |
| EU VAT | Yes*Custom plans | Yes |
| EU One Stop Shop (OSS) | Yes*Custom plans | YesFiling through partners |
| EU Import One Stop Shop (IOSS) | Not stated | PartialCalculated and reported |
| UK VAT | Yes*Custom plans | YesFiling through partners |
| Canada GST/HST | YesGST/HST, PST and QST | YesGST/HST, QST and PST |
| Australia and New Zealand GST | Yes*Custom plans | Yes |
| Rest of the world | Yes*Custom plans | Yes*Filing in about 35 more countries, higher fees |
| Compliance features | ||
| Nexus and threshold monitoring | YesFree plan | YesOn every plan |
| Real-time tax calculation | Yes*Scale plan and up | Yes |
| Tax registration | YesPaid per registration on Starter | Yes*Through local partners, fee per country |
| Return filing and payment | YesPaid per filing on Starter | Yes*Through local partners, monthly fee |
| Invoices and credit notes | Not stated | YesBranded, localised invoices and credit notes |
| E-invoicing | Not stated | Yes |
| VAT number validation | Yes | Not stated |
| Exemption certificates | Yes | Not stated |
| Marketplace facilitator sales | Not stated | Not stated |
| Developers and platforms | ||
| Public API | Yes*Premium plan | Yes |
| MCP server for AI assistants | YesMCP server | No |
| White-label for platforms | Not stated | PartialQuaderno Connect for platforms |
| Integrations | ||
| Shopify | Yes | Yes |
| WooCommerce | Yes | Yes |
| BigCommerce | Yes | No |
| Adobe Commerce (Magento) | Not stated | No |
| Amazon | Yes | Yes |
| Etsy | Not stated | No |
| Stripe | Yes | Yes |
| PayPal | Not stated | Yes |
| Chargebee | Yes | No |
| QuickBooks | Yes | No |
| Xero | Not stated | Yes |
| NetSuite | Yes | No |
| Integration library | Integrations included at no extra cost | 22 listed integrations, plus Zapier |
| Setup and support | ||
| Setup | Guided onboardingFree onboarding | Self-serveSign up yourself; an onboarding call is included |
| Support channels | email, chat and phoneAlso Slack | emailHuman support on every plan |
Yes*: offered as an add-on or on a higher plan; the note under it says how. Via partners: done by a third party. Partial: limited, see the note. Not stated: the vendor doesn’t say publicly.
Answers built from the same facts as the table above.
Kintsugi is free to start and charges per filing (Free monitoring; Starter is $75 per registration or filing). Kintsugi charges for each registration and return, so the bill grows with every state and filing. Quaderno starts at $29 a month (Hobby: 25 transactions a month, one jurisdiction). Having one US state’s returns filed costs $75 per filing with Kintsugi. Having one US state’s returns filed costs $70 a month with Quaderno.
Kintsugi offers return filing (Paid per filing on Starter). Quaderno offers return filing as an add-on (Through local partners, monthly fee). Kintsugi offers tax registration (Paid per registration on Starter). Quaderno offers tax registration as an add-on (Through local partners, fee per country).
Kintsugi calculates tax in 100+ countries. Quaderno doesn’t publish how many countries it covers. Kintsugi offers EU VAT as an add-on (Custom plans). Quaderno offers EU VAT.
Kintsugi doesn’t say publicly whether it offers e-invoicing. Quaderno offers e-invoicing.
Both connect to Shopify, WooCommerce, Amazon and Stripe. Only Kintsugi lists BigCommerce, Chargebee, QuickBooks and NetSuite. Only Quaderno lists PayPal and Xero.
Kintsugi suits small US sellers filing a few returns a year and Shopify or Stripe merchants who want to start with free monitoring. Quaderno suits creators and course sellers, small SaaS businesses and EU-based online sellers.
Every fact comes from the vendor’s own pages, checked November 6, 2026. Where a vendor doesn’t say, we write “Not stated”. GoodVat publishes this comparison and is one of the tools in it. Spotted an error? Email hello@goodvat.com.
Independently reviewed and signed off by accountants in 4 jurisdictions on November 6, 2026, to keep it objective.
GoodVat registers you, calculates tax at checkout, sends invoices and files your returns, with filing prices published per US state and per country. Tell us where you sell and we’ll map what you need.
