Overview

Vatstack is a VAT-focused API and web service for businesses selling digital services across borders. It is best suited to teams that need tax calculations and VAT/GST checks inside their own sales workflows. Its blend of rate lookup, validation, and reporting is practical, but usage-based charges make sales and validation volumes central to plan choice.

Key features

Rates and calculations

The rates API covers domestic and cross-border VAT rules, with updates applied when government changes take effect at midnight local time. Customer location can be determined from an IP address using MaxMind GeoIP2 or from a billing address. Vatstack calculates VAT-inclusive and VAT-exclusive prices, checks VAT numbers for exemption eligibility, and adjusts rates for some digital products such as ebooks. That combination fits sellers of telecommunications, broadcasting, and electronic services; teams with broader tax needs should assess whether a VAT-centered tool covers their workflow.

Verification and records

Real-time VAT and GST checks cover the 27 EU member states, Australia, Norway, Singapore, Switzerland, and the United Kingdom. EU and UK checks receive a unique consultation number, and records are stored in the cloud and replicated between EU data centers on AWS. Bulk CSV validation through the dashboard is useful when teams need to process many IDs without building each check into a live transaction flow.

Reporting and integrations

Vatstack compiles VAT OSS and EC Sales List reports, converting amounts to the reporting currency with European Central Bank exchange rates. Its Stripe integration syncs invoices, location evidence, and tax IDs, and adjusts reports when customers are refunded. This is a meaningful fit for teams already using Stripe, while the stated connector does not establish equivalent workflows for other commerce platforms.

Pricing

Vatstack has a free Developer plan and paid tiers starting at $15/mo. The Developer plan is free for life and includes unlimited quotes, dummy validations, and dummy supplies; it is suited to trying the API flow, not processing real VAT activity.

Launch starts at $0/mo* and includes 100 VAT validations and 20 VAT sales, with additional validations at $0.09 and additional sales at $0.45. Its zero starting price is useful for very low-volume use, but the small included allowances and higher per-use charges can make it a poor fit as real activity grows.

Small Business starts at $15/mo* and includes 500 VAT validations and 100 supplies per month; additional validations cost $0.03 and additional supplies $0.15. This is the clearest fit for a smaller seller with recurring real usage: it provides larger allowances and lower overage rates than Launch without the Enterprise entry price.

Enterprise starts at $150/mo* and includes 15,000 VAT validations and 3,000 supplies per month, with additional validations at $0.01 and supplies at $0.05. Its 99.95% SLA and lower per-use rates are aimed at higher-volume operations. Because each paid plan bills additional use per validation or sale/supply, forecast both measures rather than relying on the headline monthly price.

Platforms

Vatstack is offered through an API and web dashboard. API access and real-time calculations suit teams integrating checks into software; the dashboard also supports bulk CSV validation. The service lists multiple tax types and commerce connectors, with Stripe described as an integration.

Who it's for

Vatstack is strongest for developer-led businesses selling digital services internationally that need VAT rates, location-based calculations, number checks, and EU/UK reporting in one workflow. Teams that value auditable EU and UK validation records or already use Stripe have additional reasons to consider it. It is less compelling for companies seeking a broad, non-VAT-specific tax platform or predictable flat pricing independent of use.

Pros and cons

Pros: Broad VAT workflow combines rates, calculations, exemption checks, and reporting, reducing the need to assemble those functions separately.
Pros: Real-time checks span EU and several non-EU markets, with consultation numbers for EU and UK checks and cloud-replicated records.
Pros: Paid tiers lower per-use charges as included validation and supply capacity rises, giving growing teams a path from small to larger volumes.
Cons: Launch's 100 validations and 20 sales, and Small Business's 500 validations and 100 supplies, require attention to overages as volume changes.
Cons: The only named commerce integration is Stripe, so teams on other platforms should not assume equivalent synchronization.
Cons: The free Developer allowance is limited to dummy activity, so it does not provide a free production tier.

Alternatives

For teams whose priority is nexus exposure rather than VAT calculations and reporting, Zamp offers a free 30-day sandbox and a U.S. plan described for audit-ready U.S. compliance while scaling. Kintsugi is another freemium API option for global physical and economic nexus monitoring, historical liability auditing, and risk assessment. Numeral suits teams seeking a free nexus study, monitoring, threshold alerts, and exposure audits.

For a paid API and web alternative where pricing requires a conversation, consider Sovos Tax Determination. ONESOURCE Certificate Manager is a paid option with API, self-hosted, web, and Windows platforms and a free demo. Stripe Tax is worth comparing for teams that want tax calculation and collection within its Billing, Checkout, Invoicing, or Payment Links integrations, or through its API. Avalara VAT Registration is another paid API and web option. Quaderno may suit teams comparing transaction, user, jurisdiction, and integration allowances across its plans.

Browse Tax Engine Software or VAT Software for more options.

Verdict

Vatstack is a strong fit for digital-service businesses that want VAT rates, real-time VAT/GST verification, evidence records, and OSS/EC Sales List reporting behind an API. Its strongest case is the joined-up VAT workflow, especially for Stripe users; look elsewhere if you need a wider tax remit, a named connector beyond Stripe, or tighter cost predictability than usage-based billing provides.

	Complyt	Vatstack
Free plan	No	Yes
Free trial	No	No
Paid from	—	$15/mo
Open source	No	No
Platforms	Web	api, Web
Exemption certificates	Yes	—
Free plan	—	Yes
Paid from	—	15 /mo
Transaction limit	—	100 transactions/mo
Real-time calculation	—	Yes
Tax types	—	multiple
API access	—	Yes
Commerce connectors	—	Yes

Complyt vs Vatstack

Complyt

Vatstack