Quaderno Review 2026: Features, Use Cases, and Who It is for

Quaderno is a self-service tax compliance platform built for digital product sellers, SaaS founders, freelancers, and small online businesses with international customers. It helps calculate VAT, GST, and sales tax, generate compliant invoices, and organize tax reports across multiple markets.

This Quaderno review 2026 covers what the platform does, who it is built for, and how it compares with a managed compliance service like Zamp for companies that want sales tax handled end to end.

For U.S.-focused businesses with multi-state obligations, the bigger question is not only whether a platform can calculate tax. It is who manages the work after calculation: registrations, filings, notices, audit support, and ongoing nexus monitoring. That is where Zamp becomes the stronger fit for startups to $300M+ companies that want a partner to handle compliance for them or with them.

Key takeaways

• Quaderno is a self-service tax compliance tool built for digital goods sellers, SaaS founders, and freelancers with international customers. It calculates tax, generates invoices, and produces reports.
• Quaderno uses a self-service subscription model, while Zamp uses custom-scoped, all-in-one pricing based on the actual compliance footprint.
• Quaderno covers VAT and GST compliance across 100+ countries, which makes it useful for cross-border digital commerce.
• U.S. sales tax support requires setup and is generally best evaluated based on a business’s exact state, product, and filing needs.
• Quaderno added PEPPOL e-invoicing support, which is relevant for EU B2B e-invoicing requirements.
• Quaderno was acquired by Visma, a Norwegian enterprise software company, in September 2023. Product roadmap decisions now operate within Visma’s broader portfolio priorities.
• Zamp is the stronger fit for companies that want managed U.S. sales tax compliance, global VAT/GST support, registrations, filings, notice management, audit support, and liability sharing.

What is Quaderno?

Quaderno is a self-service tax compliance platform for companies selling digital goods, software, subscriptions, and online services across international borders. It automates tax calculations, generates compliant invoices, and produces tax reports for businesses that need VAT and GST support without building tax logic from scratch.

Quaderno covers VAT across Europe and many international markets, GST in countries including Australia, Canada, and New Zealand, and U.S. sales tax after setup. At each transaction, the platform determines the applicable rate, generates an invoice, and captures the data for reporting.

Quaderno operates as a software tool. Businesses use the platform to calculate tax, create invoices, and organize reporting data. Zamp operates differently. Zamp’s managed sales tax service combines software, dedicated tax professionals, registrations, filings, notices, audit support, and ongoing compliance execution in one place.

In September 2023, Visma acquired Quaderno. Quaderno now operates within the Visma portfolio, which gives it the backing of a larger enterprise software group.

Quaderno at a glance

Quaderno features in 2026

Quaderno’s core features cover tax calculation, automatic invoicing, EU e-invoicing, jurisdiction reporting, nexus monitoring, integrations, and VAT ID verification. These features are most relevant for businesses that want software to support tax workflows while keeping internal ownership of the process.

Tax calculation across 100+ countries

Quaderno handles VAT, GST, and U.S. sales tax through a single interface. Core features include real-time tax rate determination, automatic invoicing, and filing-ready reports across 100+ countries.

The platform identifies the correct VAT or GST rate based on the customer’s location, the product category, and applicable local rules. For EU VAT, Quaderno supports the One-Stop Shop framework, which helps businesses organize cross-border EU VAT reporting through a single quarterly return process.

For U.S. sales tax, businesses should evaluate how Quaderno’s setup fits their exact obligations. U.S. sales tax operates across more than 13,000 jurisdictions at the state, county, city, and special-district level, with product taxability rules that vary by location.

For businesses that want managed U.S. sales tax support, Zamp covers 13,000+ U.S. jurisdictions and 70+ countries with real-time rooftop-accurate rates, dedicated experts, and managed compliance workflows.

Automatic invoicing and billing

Every transaction processed through Quaderno can generate a tax-compliant invoice. Invoices are customizable, available in multiple languages, and include the tax fields needed for international compliance workflows.

Quaderno also supports credit notes and expense records. Quaderno Checkout is an optional payment collection layer that combines payment processing and compliant invoice generation into one flow.

PEPPOL e-invoicing for EU mandates

Quaderno supports PEPPOL e-invoicing, which is relevant for businesses selling to EU B2B customers. PEPPOL is a structured electronic invoicing standard used across Europe for digital invoice exchange.

For businesses with EU enterprise customers, PEPPOL support can help produce invoices in a structured digital format. This is especially relevant as more European countries move toward digital B2B invoicing and real-time VAT reporting requirements.

Tax reports by country and jurisdiction

Quaderno pulls sales data from connected channels and organizes it into tax reports by country. For EU VAT, reports are structured to support OSS submission. For other jurisdictions, reports summarize tax collected by country so internal teams or accountants can use that information in their filing process.

Reports update in real time, which helps teams track obligations throughout the reporting period instead of reconstructing transaction data at quarter-end.

Nexus threshold monitoring

Quaderno tracks sales volume against registration thresholds for each country and U.S. state. When sales approach a threshold, the platform sends alerts so businesses can review potential obligations before they become more complex.

For businesses that want more than threshold alerts, Zamp’s nexus monitoring helps identify where registrations may be needed and supports the next steps through managed registration and compliance workflows.

Integration with 15+ platforms

Quaderno connects with tools commonly used by digital businesses, including:

• Payment processors: Stripe, PayPal, GoCardless, Braintree
• Ecommerce platforms: Shopify, WooCommerce, Easy Digital Downloads, Gumroad, PrestaShop
• Billing and accounting: Xero, Recurly, Chargebee
• Automation: Zapier

Each integration helps pull transaction data into Quaderno so calculations, invoices, and reports stay current.

Businesses using Shopify, Stripe, or WooCommerce should evaluate how each integration supports their taxability rules, transaction types, and reporting workflows. Zamp also supports major ecommerce, billing, accounting, and ERP platforms, including Shopify, Stripe, WooCommerce, and NetSuite.

VAT ID verification for B2B transactions

Quaderno verifies EU VAT ID numbers for business customers. Confirmed B2B transactions can qualify for reverse-charge treatment, depending on the transaction details and applicable rules.

This is useful for SaaS companies and digital product businesses with enterprise customers across Europe, where B2B VAT treatment can affect a meaningful share of transactions.

Pricing model comparison

Quaderno uses a self-service subscription model tied to usage. That model can work for teams that want software to calculate tax, generate invoices, and produce reporting data.

Zamp is different. Zamp uses custom-scoped, all-in-one pricing based on the business’s actual compliance footprint. There are no per-transaction fees, no per-filing fees, and no surprise invoices. Pricing is bundled around the work Zamp handles, including calculations, nexus monitoring, registrations, filings, notices, dedicated experts, and global VAT/GST support where needed.

Zamp’s pricing structure includes:

• Free: Nexus assessment, taxability review, exposure estimate, 30-minute expert consultation, and API sandbox
• U.S.: Full managed compliance, including calculations, nexus, registrations, filings, notices, and dedicated experts
• Global: Everything in U.S., plus VAT/GST calculations, international thresholds, global registrations, and multi-country filing

For companies evaluating tax software and services, pricing should not be judged only by the subscription model. The bigger question is whether the provider is only giving your team tools or actually handling the work. Zamp is built for businesses that want tax compliance handled through a managed partner, not pushed back onto the finance team.

Who Quaderno is designed for

Quaderno is designed for businesses that sell digital products or services across international borders and want a self-service platform for tax calculation, invoicing, and reporting.

Quaderno is commonly evaluated by:

• SaaS founders and independent developers selling subscriptions to international customers
• Digital product sellers, including course creators, template makers, and software license sellers
• Freelancers and consultants with clients in multiple countries
• Small ecommerce businesses with international customers and manageable transaction volume
• Businesses that want invoice and reporting support for VAT/GST workflows

For companies with expanding U.S. sales tax exposure, the evaluation changes. Multi-state obligations can involve registrations, filings, notice management, audit support, product taxability reviews, marketplace facilitator rules, and historical exposure cleanup.

That is where a managed service like Zamp becomes a stronger fit. Zamp is built for ecommerce, SaaS, digital services, and multichannel businesses that want a partner to manage compliance execution while still giving finance teams visibility and control.

How we evaluated Quaderno

We evaluated Quaderno across five criteria: geographic coverage, reporting support, pricing model, integration quality, and service model. Public product information and third-party user feedback were reviewed to understand Quaderno’s tax calculation, invoicing, reporting, and self-service workflows.

The evaluation found that Quaderno is positioned as a self-service option for international VAT/GST automation, while Zamp is positioned for businesses that want managed registrations, filings, notice support, liability sharing, and end-to-end compliance execution.

These factors matter for startups to $300M+ companies expanding into multiple U.S. states, especially when sales tax work becomes too complex for a lean finance team to manage manually.

Quaderno user feedback

Quaderno earns positive user feedback across third-party software review platforms, with ease of integration with Stripe and Shopify and automated invoicing cited often by users.

What users highlight:

Ease of integration is a common theme in positive reviews. Users often reference setup with Stripe and Shopify, along with automatic invoice generation and reporting support.

International sellers with EU customer bases also highlight OSS reporting support as a helpful part of the platform. For businesses selling digital products or SaaS across Europe, Quaderno can help organize VAT data into a more manageable reporting workflow.

Developers and platform builders also highlight Quaderno’s API as a useful option for teams embedding tax logic into custom applications.

How Quaderno compares to a managed service

Quaderno sits in the self-service software category. The platform provides tools to calculate tax, generate invoices, and produce reports. The business keeps ownership of the broader workflow, including registrations, filings, notices, and audit response.

Zamp sits in the managed compliance category. Zamp combines software, dedicated tax experts, automated registration and filing workflows, notice management, audit support, and liability sharing. The result is a service model where Zamp can handle tax compliance for you or with you, depending on how much control your team wants to keep.

Zamp

Zamp is a managed sales tax compliance service built for startups to $300M+ companies that want tax handled by experts, not pushed back onto internal teams. It combines intelligent automation, dedicated tax professionals, and hands-on compliance execution across U.S. sales tax and global VAT/GST.

Zamp supports two operating models. In a done-for-you model, Zamp handles the compliance workflow from registrations through filings, notices, and audit support. In a done-with-you model, your finance team keeps more oversight while Zamp handles execution. That flexibility matters for controllers and CFOs who want visibility without becoming sales tax operators.

Zamp is especially useful for businesses that sell across multiple states, use multiple platforms, manage product taxability rules, or need help cleaning up past exposure. Instead of handing your team reports and leaving the rest to you, Zamp helps manage the process from start to finish.

Where Zamp adds managed support

• Real-time rooftop-accurate rates. Zamp supports real-time rooftop-accurate rates across 13,000+ U.S. jurisdictions and 70+ countries.
• Registrations included. Zamp helps manage state registrations so businesses are set up properly before filing obligations expand.
• Filing support. Zamp files returns on your behalf and supports ongoing filing workflows with dedicated experts.
• Notice management. Zamp proactively manages tax authority notices and helps close them out before they become a larger distraction.
• Audit support. Zamp provides audit defense and support throughout tax inquiries.
• Liability sharing. The Zamp Commitment means Zamp covers penalties and interest if Zamp makes an error.
• Global support. Zamp supports global VAT/GST across 70+ countries, including calculations, international thresholds, registrations, and multi-country filing.
• Expert access. Zamp customers work with tax professionals who understand sales tax, not just software support queues.
• Cleanup work. Zamp supports past-due returns, registration remediation, and exposure review when businesses need to clean up historical issues.

Zamp’s team brings 400 years of combined sales tax expertise. The company has served 1,200+ finance and accounting teams, completed 100,000+ filings on time, managed 75,000+ notices, and maintains 97.8% customer retention.

For a direct comparison of Quaderno, Webgility, and Zamp, see the Quaderno vs. Webgility vs. Zamp breakdown. For broader market comparisons, explore Zamp’s guides to sales tax compliance software and sales tax automation software for ecommerce.

Get sales tax off your plate with Zamp’s managed service for registrations, filings, notices, audit support, and global compliance.

Common mistakes when choosing tax compliance software

Choosing tax software is not just about finding a tool that can calculate a rate. It is about choosing the right operating model for your business.

Confusing VAT coverage with U.S. sales tax depth

VAT and U.S. sales tax are different compliance problems. VAT often operates at a country level, while U.S. sales tax involves more than 13,000 jurisdictions, state-by-state product taxability rules, economic nexus thresholds, and filing requirements.

A business that sells digital products internationally may care most about VAT and invoicing. A business expanding across U.S. states may need registrations, filings, notices, and audit support. Zamp is built for companies that want those U.S. and global workflows managed in one place.

Only comparing software subscription costs

Subscription cost is only one part of tax compliance. The real cost also includes internal time spent reviewing reports, managing registrations, submitting returns, resolving notices, and explaining tax decisions to finance leadership.

Zamp’s custom-scoped, all-in-one pricing is designed around the actual compliance work needed. That means calculations, nexus, registrations, filings, notices, and dedicated expert support are bundled without per-transaction fees or per-filing fees.

Overlooking liability

With self-service tools, the business usually keeps primary responsibility for the final compliance outcome. That means internal teams still need to understand registrations, filing deadlines, notices, product taxability, and audit exposure.

Zamp takes a different approach. With the Zamp Commitment, Zamp covers penalties and interest if Zamp makes an error. For growing businesses, that liability-sharing model can be a major difference.

Waiting for a state notice before evaluating compliance

Many businesses wait until a state notice arrives before reviewing sales tax obligations. By that point, the issue may involve missed registrations, late filings, historical exposure, or cleanup work.

A proactive review can reduce that risk. Zamp helps businesses assess nexus, estimate exposure, manage registrations, file returns, and address cleanup work where needed.

Final verdict

Quaderno can be useful for teams that want self-service tax calculation, invoicing, and reporting for international VAT/GST workflows. But for businesses that want compliance handled end to end, especially across U.S. sales tax obligations, Zamp is the stronger choice.

Zamp handles calculations, nexus monitoring, registrations, filings, notice management, audit support, and global VAT/GST workflows with dedicated tax professionals. It supports real-time rooftop-accurate rates across 13,000+ U.S. jurisdictions and 70+ countries, and the Zamp Commitment means Zamp covers penalties and interest if Zamp makes an error.

For startups to $300M+ companies that want fewer handoffs, less internal tax work, and a partner that can do it for you or with you, Zamp is the better long-term fit.

We believe you should not have to understand sales tax to get it right. Get sales tax off your plate with Zamp’s managed service for registrations, filings, notices, audit support, and global compliance.

Frequently asked questions

How does Zamp compare to Quaderno?

Quaderno is a self-service tax tool for calculation, invoicing, and reporting. Zamp is a managed compliance service that handles calculations, nexus monitoring, registrations, filings, notice management, and audit support. For businesses that want less internal tax work, Zamp is the stronger fit.

Does Zamp handle registrations and filings?

Yes. Zamp handles registrations and filings as part of its managed U.S. sales tax service. It also supports notice management, audit support, and cleanup work for past-due or historical exposure.

Does Zamp support global VAT and GST?

Yes. Zamp supports U.S. sales tax plus VAT/GST coverage across 70+ countries, including calculations, thresholds, global registrations, and multi-country filing.

How is Zamp priced?

Zamp uses custom-scoped, all-in-one pricing based on the business’s actual compliance footprint. There are no per-transaction fees, no per-filing fees, and no surprise invoices.

Who is Zamp best for?

Zamp is built for startups to $300M+ companies that want sales tax handled by a partner, not just software. It is especially useful for ecommerce, SaaS, digital services, and multichannel businesses with growing U.S. or global obligations.

Is Quaderno a managed service?

Quaderno is a self-service tool for tax calculation, invoicing, and reporting. Zamp is the managed service option for businesses that want registrations, filings, notices, and audit support handled by dedicated tax professionals.

What makes Zamp different from self-service tools?

Zamp combines software, dedicated tax experts, managed registrations and filings, proactive notice management, audit support, and liability sharing. With the Zamp Commitment, Zamp covers penalties and interest if Zamp makes an error.