Zamp vs Kintsugi: Which Sales Tax Platform Is Best in 2026?

Zamp is a fully managed sales tax compliance service: you approve, Zamp executes — registrations, filings, notices, and audit defense, handled end-to-end. Kintsugi is an automation-first sales tax platform that connects to your data sources and automates nexus monitoring, calculations, filings, and remittance, with support available from the Kintsugi team. That single distinction shapes every other difference in this comparison.

We reviewed both platforms across pricing, features, liability, integrations, and real user feedback to give you the data you need to decide.

Key takeaways

Here are the six things that matter most when evaluating Zamp vs Kintsugi for your business.

• Pricing models differ meaningfully. Kintsugi Starter charges $75 per automated action, including filings and registrations, while Zamp uses custom pricing based on your footprint.
• Zamp markets a formal commitment around filing and accuracy. Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits. Kintsugi customers bear all audit and penalty risk themselves.
• Zamp emphasizes a managed-service model with dedicated tax professionals. Kintsugi combines automation with chat-based support and access to human tax experts.
• Kintsugi has a free tier and no annual contract. For pre-revenue startups or businesses filing in a handful of states, that accessibility is a genuine advantage worth acknowledging.
• In April 2025, Vertex Inc. invested in Kintsugi (10% stake), establishing a revenue-sharing and IP-sharing commercial partnership. Enterprises evaluating Kintsugi for the long term should factor in what that relationship means for platform independence.
• Zamp covers real-time rooftop-accurate rates across 13,000+ U.S. jurisdictions and 70+ countries. Kintsugi markets VAT and GST support beyond the U.S., including coverage for Canada, the EU, and many additional countries, so international fit should be evaluated based on the specific jurisdictions and workflows your team needs.

Zamp vs Kintsugi at a glance

These are the top-line differences that define the Zamp vs Kintsugi decision for most businesses.

Why teams are evaluating Zamp vs Kintsugi in 2026

The Zamp vs Kintsugi decision comes up most often when a finance team has outgrown their current setup — typically at the point where multi-state filing volume is straining the team or audit exposure is becoming real.

Sales tax complexity has compounded since South Dakota v. Wayfair (2018) made economic nexus enforcement mandatory in all 45 states with a sales tax. A company selling across channels — Shopify, Amazon, B2B direct — can trigger nexus in a dozen states without ever opening an office. State notice volumes are rising. Audit exposure follows.

Most finance teams evaluating Zamp vs Kintsugi are in one of two situations:

They’ve outgrown their current setup. A spreadsheet or disconnected filing tool worked at five states. At fifteen, it doesn’t. Filing deadlines are stress. Notices go to the wrong inbox. Nobody is certain whether every state is registered correctly.

They’re choosing their first compliance platform. A recent funding round, a new state launch, or a Wayfair threshold crossing has made the status quo untenable. They want to get ahead of the problem before the first notice arrives.

In a Zamp vs Kintsugi evaluation, both platforms solve the same underlying problem — but they solve it differently. That difference matters most at scale and in high-exposure situations.

What is Zamp?

Zamp is a fully managed sales tax compliance platform for growing ecommerce and SaaS companies. It handles everything — registrations, filings, notices, audit defense, and international VAT/GST — for businesses from startups to enterprise-scale operations. The core promise: “The last sales tax service you’ll ever need.”

Zamp offers two operating models: done for you — Zamp takes care of everything, client approves and Zamp executes — or done with you — for controllers who prefer more oversight while Zamp handles execution. Both models use the same platform and the same team; the difference is how much your finance team stays in the loop.

Behind the platform, Zamp maintains first-party tax content across 13,000+ U.S. jurisdictions and 70+ countries. Rates are real-time and rooftop-accurate — not pulled from stale third-party data sources. When a notice arrives in a state mailbox, Zamp’s team closes it before it reaches your desk. When nexus thresholds are approaching, Zamp alerts clients proactively before threshold crossing.

Implementation is fast — most clients are live quickly. When a question surfaces, the team responds promptly. Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits.

Key features

• Fully managed registrations and filings — Done for you or done with you across all 45 states. Client approves, Zamp executes.
• Proactive notice management — Zamp closes state notices before they reach your inbox.
• Audit defense with formal commitment — Full audit support. Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits.
• Real-time rooftop-accurate rates — First-party tax content across 13,000+ U.S. jurisdictions and 70+ countries. Not stale third-party data.
• International VAT/GST coverage — 70+ countries included in the standard service. No add-on required.
• Former state auditor team — Dedicated account managers with combined expertise, not a ticket queue.
• Proactive nexus monitoring — Threshold alerts before you cross.
• Cleanup and remediation — Past-due returns, back registrations, and historical exposure work included.

Strengths

• Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits
• Human support with dedicated account managers with real tax expertise
• First-party tax data across 13,000+ jurisdictions is more accurate than platforms relying on third-party data feeds
• All-in-one pricing with no per-transaction, per-filing, or surprise fees
• Global VAT/GST in 70+ countries as a standard service, not an upsell
• High filing accuracy

Best for

Zamp is positioned as a strong option for businesses that want a managed sales tax service with hands-on compliance support. Ecommerce brands and SaaS companies managing registrations across multiple jurisdictions, carrying real audit exposure, or handling international VAT/GST obligations will find Zamp a strong option. It is also a strong sales tax partner for accounting firms that need SALT capacity without absorbing liability. If your team’s time is better spent on growth than compliance configuration, Zamp is the platform built for that outcome.

Pricing

All-in-one pricing. No per-transaction fees, no per-filing fees, no surprise invoices.

What is Kintsugi?

Kintsugi is a sales tax automation platform that puts filings on autopilot. Founded in Silicon Valley, the company has built a no-code-friendly tool that connects to popular accounting and ecommerce platforms and handles nexus monitoring, tax code classification, and filing automation — with minimal configuration overhead.

Kintsugi uses machine learning to automatically classify transactions, monitor nexus thresholds, and trigger filings when deadlines approach. It offers one-click CSV imports and no-code integrations with QuickBooks, Stripe, Chargebee, BigCommerce, and Shopify. Businesses can start with the free tier to test the platform, then move to paid plans as their filing volume grows.

In April 2025, Kintsugi raised a funding round led by Vertex Inc., which took a 10% stake and established a revenue-sharing and IP-sharing commercial partnership.

Key features

• Filing autopilot — Automated multi-state filings triggered when deadlines approach.
• Nexus threshold monitoring — Real-time alerts when approaching economic nexus thresholds.
• No-code integrations — Native connectors for QuickBooks, Stripe, Chargebee, BigCommerce, Shopify.
• One-click CSV import — Easy data ingestion without engineering involvement.
• Free tier — Basic nexus tracking available at no cost.
• No annual contract — Month-to-month flexibility on Starter plan.
• Multi-state registration management — Handles state registrations alongside filings.

Strengths

• Free tier lets early-stage companies track nexus before they need to file.
• No annual contract — flexible month-to-month on Starter plan.
• No-code integrations for fast setup.
• Kintsugi offers 24/7 support through its platform and positions the product as combining AI automation with human tax-expert support.
• Fast onboarding — quick time-to-value.

Best for

Kintsugi is positioned as an automation-first option with transparent entry pricing and broader self-serve flexibility. Pre-revenue startups and early-stage companies that want a free or low-cost tool to track nexus before filing obligations begin, and growth-stage businesses where self-service automation is preferred. If your integrations are standard (QuickBooks, Shopify, Stripe, BigCommerce) and you prefer a self-service model with no annual contract, Kintsugi delivers value at that scale.

Zamp vs Kintsugi: feature-by-feature comparison

Zamp leads on liability protection, human support, and international coverage. Kintsugi leads on free entry pricing, no-code integrations, and no annual contract.

Nexus monitoring

Zamp monitors nexus thresholds proactively across all 45 sales tax states — and flags exposure before you cross a threshold. That matters because the cost of missing a threshold and getting registered retroactively — with penalties — is substantially higher than staying ahead of it.

Kintsugi offers real-time threshold monitoring and will alert you when thresholds are approaching. Both platforms cover the core nexus-tracking requirement introduced after South Dakota v. Wayfair (2018), which made economic nexus enforcement mandatory in all 45 states with a sales tax. The practical difference is that Zamp’s monitoring is backed by a tax team that takes action — not just alerts you.

Registrations and filings

Both platforms handle multi-state registrations and automated filings. Zamp manages registrations as part of the all-inclusive service — no additional fee, no separate process.

Kintsugi handles registrations and filing autopilot as well. The distinction: Zamp’s team executes filings on your behalf, whereas Kintsugi’s automation relies on accurate data inputs from your connected systems. When integrations work correctly, Kintsugi’s filing workflow is smooth. When they don’t, resolution falls on your team, not theirs.

Zamp vs Kintsugi: audit support and liability

This is where Zamp vs Kintsugi diverges most clearly. Zamp provides full audit defense support and markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits.

Kintsugi does not offer an equivalent liability-sharing arrangement. If an audit finds an error — whether from a misclassified transaction, a missed filing, or a data import issue — the customer bears the full financial exposure. For businesses managing significant multi-state revenue, that distinction is material.

International coverage

Zamp covers VAT/GST compliance in 70+ countries — relevant for SaaS and software companies with customers in the EU, UK, Australia, Canada, and beyond. International coverage is part of the standard service, not an add-on.

Kintsugi markets VAT and GST support beyond the U.S., including coverage for Canada, the EU, and many additional countries, so international fit should be evaluated based on the specific jurisdictions and workflows your team needs.

Integrations

Kintsugi’s strength is its no-code integration catalog: QuickBooks, Stripe, Chargebee, BigCommerce, Shopify, and one-click CSV imports. Setup is fast, and the no-code approach means finance teams can configure the tool without engineering involvement.

Kintsugi is actively improving integrations. If you run a deeply customized ERP stack, validate integrations thoroughly before committing.

Zamp integrates with standard accounting and ecommerce platforms. Its integration catalog should be reviewed if you run a deeply customized ERP stack.

Zamp vs Kintsugi pricing: what you actually pay at scale

In any Zamp vs Kintsugi comparison, pricing is one of the biggest decision points. Kintsugi’s Starter pricing is publicly listed per automated action, including filings and registrations, while Zamp uses custom pricing based on your filing footprint and compliance scope.

Zamp’s pricing includes everything: nexus monitoring, state registrations, automated filings, notice management, audit defense, international coverage, and dedicated support. No per-transaction fees. No per-filing fees. No surprise invoices at the end of the month — a known pain point with legacy providers like Avalara and TaxJar that Zamp’s transparent pricing model was designed to eliminate.

For businesses already filing in multiple states — or planning to scale within the next 12 months — Zamp’s all-inclusive pricing delivers strong unit economics and eliminates the billing variability that creates budget headaches for finance teams.

Zamp vs Kintsugi: human experts vs automated support

One of the sharpest contrasts in any Zamp vs Kintsugi analysis is support quality. Kintsugi offers 24/7 support through its platform and positions the product as combining AI automation with human tax-expert support. For routine questions about integrations, filing status, and standard nexus lookups, that works fine.

Where automated support can fall short is in nuanced compliance situations: complex audit defenses, state-specific gray areas, multi-jurisdiction exemption certificate handling, or the kind of judgment calls that require someone who has worked as a state auditor. Those are not automated support questions — they are questions that require a person.

Zamp’s support model is built around human access. Clients work with dedicated account managers — not a ticket queue. The team includes former state auditors and specialists with combined sales tax expertise. When an audit notice lands or a state questions a classification, Zamp’s team handles it.

That level of human access is Zamp’s biggest operational differentiator. Finance teams consistently describe it the same way: they expected software, and got a team.

Final verdict

Zamp is positioned as a strong option for businesses that want a managed sales tax service with hands-on compliance support, while Kintsugi is positioned as an automation-first option with transparent entry pricing and broader self-serve flexibility. Here is how to make the final call:

• For scaling businesses with real audit exposure, Zamp is a strong choice. The all-inclusive pricing model, formal commitment with stated conditions, and human support team handles the situations that software alone cannot.
• For early-stage companies and startups with low filing volume who want a self-service tool, a free starting point, and month-to-month flexibility, Kintsugi is a legitimate option at that scale.
• For businesses evaluating long-term platform independence, the April 2025 Vertex Inc. investment in Kintsugi — a revenue-sharing and IP-sharing partnership with a legacy sales tax incumbent — is worth factoring into your multi-year planning.

If your primary need is getting sales tax off your plate — completely, with a team that owns the outcome — Zamp is built for that.

Frequently asked questions

What is the main difference between Zamp and Kintsugi?

In the Zamp vs Kintsugi comparison, the core difference is the service model. Zamp is a fully managed service — a team of tax professionals handles registrations, filings, notices, and audit defense on your behalf. Kintsugi is an automation-first sales tax platform that connects to your data sources and automates nexus monitoring, calculations, filings, and remittance, with support available from the Kintsugi team. This distinction shapes pricing, liability, and support quality across the entire product.

How does Zamp pricing compare to Kintsugi?

In a Zamp vs Kintsugi pricing analysis, Kintsugi’s Starter plan uses transparent per-action pricing, while Zamp uses custom quote-based pricing, so the breakeven point depends on the specific scope of your compliance footprint.

Does Kintsugi offer a free plan?

Yes. Kintsugi offers a free tier with basic nexus tracking, allowing businesses to get started without upfront cost. Paid plans activate when you are ready to file. There is no annual contract on either tier. This is a key differentiator in the Zamp vs Kintsugi comparison for early-stage companies.

Is Zamp worth the cost for multi-state filers?

For businesses filing in multiple states, Zamp’s all-inclusive pricing model can be economical once you do the math. Beyond the price, Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits — a meaningful protection that Kintsugi does not offer. For teams with real audit exposure, that combination makes Zamp a strong investment in any Zamp vs Kintsugi evaluation.

What is the Zamp Commitment?

Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits. This is not standard in the sales tax software industry, where most platforms place full audit and penalty risk on the customer. It is the clearest expression of what “fully managed” means in practice — and a major differentiator in the Zamp vs Kintsugi decision.

What happened to Kintsugi after the Vertex investment?

In April 2025, Vertex Inc. — a legacy sales tax technology company — invested in Kintsugi for a 10% stake. The deal included a revenue-sharing and IP-sharing commercial partnership. For companies weighing Zamp vs Kintsugi for long-term use, the strategic relationship is worth monitoring for its impact on Kintsugi’s platform independence and roadmap direction.

Does Zamp handle international VAT/GST?

Yes. In any Zamp vs Kintsugi international comparison, Zamp covers VAT/GST compliance in 70+ countries as part of its standard service — relevant for SaaS and ecommerce companies with customers in the EU, UK, Canada, Australia, and elsewhere. Kintsugi markets VAT and GST support beyond the U.S., including coverage for Canada, the EU, and many additional countries, so international fit should be evaluated based on the specific jurisdictions and workflows your team needs.

Can Kintsugi handle multi-state filings automatically?

Yes, Kintsugi’s filing autopilot handles multi-state filings automatically once connected to your data sources. Integration quality should be validated thoroughly before going live to ensure smooth operation.

What does it actually feel like to switch to Zamp?

Finance teams that switch to Zamp consistently describe the same experience: they expected software to use, and got a team that handles everything. Onboarding is fast. Support responds promptly.

Zamp vs Kintsugi: which is better for ecommerce?

For ecommerce companies selling across multiple channels — Shopify, Amazon, BigCommerce — Zamp is a strong choice for teams that want managed service support. Zamp’s managed service handles multi-channel nexus monitoring, registrations across all 45 sales tax states, and proactive notice management without requiring configuration or upkeep from your team. Kintsugi is a strong fit for early-stage ecommerce brands with straightforward compliance needs and standard integrations.

Does Kintsugi provide audit defense or penalty coverage?

Kintsugi does not offer audit defense or penalty coverage — the customer bears full audit liability. If a state audit uncovers misclassified transactions, missed filings, or a data import error, that financial exposure falls entirely on your business. Zamp markets a formal commitment around filing and accuracy, with coverage terms that apply in specific circumstances and are subject to stated conditions and limits, which is the primary differentiator.