Sales Tax Automation & Optimization forEcommerce & SaaS

End-to-end sales tax compliance with monitoring, filing, and optimization at flat rate pricing other tools can't beat.

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You never have to manually file or register again.

Kintsugi manages the complexity of sales tax with AI to automate filings, registrations and more — so you never have to visit a state portal website again.

Kintsugi is streamlining the state tax filings process, making a very complicated system more approachable and easier to understand.

John Roman

CEO, BattlBox

Why you should choose Kintsugi

AI Engine = Clean Data

Dirty data causes tax errors. Kintsugi’s ML cleans and labels your data as it comes is.

98.3 % fewer calculation errors out of the box
AI-powered product classification & address validation
Audit‑ready receipts stored forever

California

Indiana

Texas

Colorado

Sales Tax Compliance

Connectors, API’s & SDK

One‑click OAuth pipes clean data straight from the systems you already use.

Shopify, Amazon, Walmart, NetSuite,, QBO, Chargebee + more
API calls are included on flat‑rate tiers
Developer-ready SDK to cut development time

3‑Minute, 7‑Click Setup

Real integrations, no CSVs, live today.

Easily integrate with Shopify, Stripe, QBO & more
Import years of sales history
Bi‑directional sync stops double taxation

Built for Global Sales

Grow into new markets without switching tools.

Support for 36 countries today, with plans to support 100+ soon
Locally-based tax experts replace customer service reps
Multi‑currency & complex entity support built‑in

How It Works

Connect

OAuth into carts & ERPs; AI scrapes 2 years of history.

Review

Dashboard shows risk heat‑map and first refund savings.

Relax

Kintsugi files, remits, and reconciles every period—hands‑free.

Friendly pricing. No annual contracts.

No more hidden fee’s, credit limits or multi-year contracts. Only pay based on your automation and sales volume needs.

Free

Best for basic needs.

Start for free

No credit card required
Free nexus monitoring, physical and economic
Comprehensive exposure and historical liabilities auditing
Automated risk assessment
New nexus alerts
Address validation
Easy CSV transaction imports
No-code integrations: QuickBooks, Stripe, Chargebee, BigCommerce and more

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Starter

Frequently Asked Questions

Will this replace my CPA?

What if I’ve never filed—am I already in trouble?

How long to integrate?

Is the AI accurate?

Why not stay with my current tool?

What happens after the free period?

Ready to erase
sales tax stress?

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