Kintsugi automates sales tax registration, filing, and remittance for ecommerce and SaaS. Free plan; paid from $75 per action. Features and pricing reviewed.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Kintsugi is sales tax automation and compliance software aimed at ecommerce and SaaS businesses. It handles the work that follows from selling across state and country lines: working out where a business owes tax, registering, calculating the right amount, and filing and paying returns.
The platform spans the whole compliance lifecycle, including exposure monitoring, registrations, tax calculation, exemption certificates, filings and remittance, and back filing with Voluntary Disclosure Agreements and notices. It covers US sales tax, Canadian GST, HST, PST, and QST, and VAT and GST in the EU, UK, and more than 100 countries.
Kintsugi says more than 7,000 businesses use it and lists SOC 2 Type II compliance. It positions itself as month-to-month with no transaction fees, with tax experts available to customers.
Setup begins by connecting a data source, either through an integration or a file upload. Customers then add where they have a physical presence, such as offices, warehouses, or employees, and enter organization details needed for registrations. Kintsugi lists these steps at roughly 5, 2, and 7 minutes.
Once connected, the sync pulls in transactions, refunds, customers, products, and addresses. Kintsugi tracks sales against each jurisdiction's own threshold and measurement window. When a threshold is crossed, it drafts a registration prefilled from the customer's data, which the customer approves.
After registration, Kintsugi prepares and files returns on each jurisdiction's cadence and remits tax once confirmed. Every transaction is tagged with the rule it followed, so reports can be exported for audits. Judgment calls such as VDA decisions stay with Kintsugi's team rather than AI.
Exposure monitoring is the core of the free plan. It tracks economic nexus (revenue and transaction thresholds) and physical nexus, including remote employees detected through HR and payroll integrations, across every US state and 100+ countries, with alerts before a threshold becomes back taxes.
AI supports specific tasks: classifying products, including mixed carts, validating addresses down to the local district, and monitoring exposure. Kin, the in-app assistant, summarizes filings, explains rates, and pulls transactions using the customer's own data. An MCP Server lets users ask Claude or ChatGPT about their tax data.
Beyond that, Kintsugi offers exemption certificate management, Kintsugi Mail for jurisdiction notices, back filing, VDAs, overpayment recovery, a mobile app for iOS and Android, an API and SDK, and a rate engine the company says updates daily from primary sources.
Kintsugi is sales tax automation and compliance software for ecommerce and SaaS businesses. It monitors nexus, registers businesses in new jurisdictions, calculates tax, and files and remits returns. It also handles back filing and VDAs.
Kintsugi has a free plan at $0 and a Starter plan at $75 per action for the US and Canada. Scale and Premium are custom flat-rate monthly plans. There are no onboarding or transaction fees.
Yes. The free plan includes global exposure monitoring, nexus alerts, historical liability auditing, AI product categorization, address validation, and the Kin assistant. No credit card is required.
No. Kintsugi states that its plans are month-to-month, with no built-in annual price increases. Its FAQ describes billing as happening when it files or registers for you.
Kintsugi connects to 60+ platforms across billing, ecommerce, ERP and accounting, and HR and payroll. Named examples include Shopify, Stripe, Chargebee, BigCommerce, QuickBooks, NetSuite, and Microsoft Dynamics 365. CSV import and an API and SDK are also available.
Yes. Starter covers US sales tax and Canadian GST, HST, PST, and QST. Scale and Premium add VAT and GST in the EU, UK, and 100+ countries.
Yes. Kintsugi audits exposure, then offers back filing, Voluntary Disclosure Agreements, or alternatives, and can recover overpayments. VDAs led by its Tax Ops team are part of the Premium plan.
It is designed to suit them, with a free starting point, month-to-month terms, and per-action pricing on Starter. Smaller sellers can monitor exposure for free and pay for registrations and filings as they become necessary.