Kintsugi review

Kintsugi splits sales tax into a free monitoring layer and paid compliance work. The Free plan watches physical and economic nexus across the US and 100+ countries, sends alerts when you cross a threshold, audits historical liability and categorizes products with AI, with no credit card. Starter charges $75 per action in the US and Canada, which covers registrations, filings, amended returns, deregistrations and back filings for past periods, plus autoregister, filing autopilot where supported and a virtual mailbox for notices. Scale moves to one flat monthly bill and adds VAT and GST in the EU, UK and 100+ countries, real-time calculation on QuickBooks, NetSuite and Dynamics 365 invoices, and notice handling. Premium adds VDAs, advanced exemption certificates, an API and SDK, and single sign-on. Kintsugi says it serves 7,000+ businesses. The per-action model is cheap for a company filing in a few states, but monthly filers in many states should compare it with Scale.

Who it is for

Startups and SaaS companies that want free nexus monitoring now and pay only when they register or file.

Price

Free plan for exposure monitoring; Starter at $75 per action (registration, filing or amended return) in the US and Canada; Scale and Premium flat-rate by quote.

Starter Everything you need to register, file, and stay compliant in the US and Canada. $75 Per action, US and Canada
Quoted from the vendor pricing page on November 10, 2026.

Key features

• Free global exposure (nexus) monitoring with threshold alerts
• AI product categorization plus address validation and enrichment
• Registrations, filings, amended returns and back filings on Starter
• Kintsugi Mail virtual mailbox for jurisdiction notices
• No-code integrations with Shopify, Stripe, Chargebee and BigCommerce

Strengths and weaknesses

• Strength: Free plan needs no credit card
• Strength: No onboarding fees and no transaction fees
• Strength: Month-to-month contracts with no built-in annual price increases
• Weakness: Per-action fees add up when you file monthly in many states
• Weakness: EU, UK and wider VAT coverage need the Scale plan
• Weakness: Scale and Premium prices are only given on a call

Key facts

• Free plan: Yes, exposure monitoring
• Starter price: $75 per action
• Businesses served: 7,000+

Where it ranks

Kintsugi is No. 2 in our Best Sales Tax Software verdict.