# Kintsugi > AI sales tax software that monitors nexus exposure, then registers, calculates, files and remits sales tax, VAT and GST. Kintsugi is AI-assisted sales tax compliance software. Kintsugi connects to a company's billing, payment and ERP systems, shows where sales have created tax obligations, and then registers, calculates, files and remits sales tax, VAT and GST. Exposure monitoring is free, and filings are charged individually on the Starter plan or under a custom Premium agreement. **Best for:** Ecommerce and SaaS companies selling into many US states or countries that want registration and filing handled for them. - Official site: https://trykintsugi.com - Listed in: [Finance & Accounting](https://trendhub.net/ai-tools/category/finance-accounting), [E-commerce](https://trendhub.net/ai-tools/category/ecommerce) - Last checked: 2026-10-09 (facts taken from trykintsugi.com) - Source page: https://trendhub.net/ai-tools/kintsugi-ai-sales-tax-compliance-software ## Key facts - Platforms: API - Pricing model: Freemium - Free plan: Yes - API: Yes - Made by: Kintsugi AI ## What is Kintsugi? Kintsugi is sales tax compliance software for ecommerce, SaaS and finance teams. It connects to billing, payment, HR and ERP systems, then monitors where a business has crossed, or is approaching, physical or economic nexus thresholds across US states and more than 100 countries. Once exposure is identified, Kintsugi handles registration, calculates tax at checkout or on invoices, prepares and files returns, and remits payment, covering sales tax, VAT and GST in one platform. AI is used for specific tasks: classifying products, validating addresses down to the local district, tracking thresholds, and powering Kin, an in-app assistant that answers questions from the customer's transaction data. Decisions that need judgment, such as voluntary disclosure agreements, stay with Kintsugi's human team. The platform also manages exemption certificates and back filings and offers an API. ## Key features - **Exposure Monitoring**: Tracks economic and physical nexus thresholds by state and country and alerts the business when one is near or crossed. - **Registration and Filing**: Registers the business where required, prepares returns on each filing schedule and remits the tax due. - **Tax Calculation**: Works out the tax at checkout or on an invoice using rules for the specific product and address. - **AI Product Classification**: Categorises each product, including items in mixed carts, for the customer to review and approve. - **Kin Assistant**: Summarises filings, explains rates and retrieves transactions in response to typed questions. - **Integrations**: Syncs with stores, marketplaces, billing, payments, HR and ERP systems, with an API for custom connections. ## How Kintsugi works 1. **Connect a data source**: Link a sales system through an integration, or upload a file, so nexus and liabilities can be calculated. 2. **Add physical presence**: Indicate where the business has offices, warehouses or employees. 3. **Add organisation details**: Provide the company information required for registrations. ## Use cases - **Checking Exposure After Growth**: See whether a funding round, new sales channel or seasonal surge has created new obligations. - **Multi-State Ecommerce**: Collect and file for a direct-to-consumer store selling into many US states. - **SaaS Billing**: Apply the correct tax to software subscriptions invoiced through a billing system. - **Cleaning Up Past Periods**: Address earlier gaps through back filing or a voluntary disclosure agreement. - **Selling Abroad**: Handle VAT and GST registrations and filings alongside US sales tax. ## Things to know - **Starter is US-focused**: Registration and filing on Starter cover the United States; multi-country compliance is part of Premium. - **Guarantee is a Premium feature**: The Kintsugi Guarantee, under which the company pays penalties or interest caused by its own calculation or filing errors, is included with Premium only. - **Vertex engine for NetSuite**: For NetSuite customers, Vertex's tax engine runs inside Kintsugi's workflows. - **Human review for judgment calls**: Matters such as voluntary disclosure decisions and grey-area rules are handled by the company's team rather than by AI. ## FAQs ### What is Kintsugi? Kintsugi is AI-assisted sales tax software that monitors tax exposure and handles registration, calculation, filing and remittance. ### What is Kintsugi used for? Kintsugi is used by ecommerce, SaaS and finance teams to stay compliant with sales tax, VAT and GST across US states and other countries. ### Is Kintsugi free? Kintsugi: a free plan is available. Paid plan rates are published on trykintsugi.com. Check the official pricing page for current amounts. ### How much does Kintsugi cost? Kintsugi: a free plan is available. Paid plan rates are published on trykintsugi.com. Check the official pricing page for current amounts. ### Does Kintsugi have an API? Yes. Kintsugi provides an API, and its pricing page lists API, SDK and SSO access under the Premium plan. ### Which countries does Kintsugi cover? Kintsugi covers US sales tax plus VAT and GST in Canada, the EU, the UK and more than 100 countries, with multi-country compliance on Premium. ### Where does Kintsugi use AI? Kintsugi applies AI to product classification, address validation, exposure monitoring and its Kin assistant, while judgment calls are left to its staff. ### Does Kintsugi require a long-term contract? No. Kintsugi says there is no long-term contract lock-in and no onboarding fee. --- Source: https://trendhub.net/ai-tools/kintsugi-ai-sales-tax-compliance-software (trendhub)