Overview
Vatstack is operated by Gatemill, Inc., whose copyright notice runs from 2018[11]. Its validation API checks VAT numbers for all 27 EU member states, the United Kingdom, Norway, Switzerland, Australia and Singapore, using official government databases including VIES[10].
Each EU and UK check returns a unique consultation number, and Vatstack stores it automatically once the customer’s own VAT number is saved in account settings[10]. The response includes validity, format validity, active status, company name, address and type, and timestamps[10]. Its distinctive design is the handling of outages: when a government service returns an error such as SERVICE_UNAVAILABLE, Vatstack still accepts the request, keeps retrying in the background and delivers the result to the customer’s server by webhook[10]. Bulk re-validation is available by CSV import[10].
Prices are shown in dollars without a currency code and exclude VAT[11]. The Enterprise plan carries a 99.95% SLA, and data is processed in the EU[11]. The asynchronous model needs a webhook endpoint, and coverage is narrower than VAT Sense’s.
Vatstack features
- EU, UK, Norway, Switzerland, Australia, Singapore
- Consultation numbers stored automatically
- Automatic revalidation during outages
- Webhook delivery of results
- CSV bulk re-validation
- VAT rates and VAT sales records
Vatstack pricing
Developer: free test keys. Launch: $0/month with 100 validations, then $0.09 each. Small Business: $15/month with 500 included, then $0.03. Enterprise: $150/month with 15,000 included, then $0.01. Prices exclude VAT; currency code not stated.
Vatstack strengths and limitations
Strengths
- Consultation numbers stored for every EU and UK check
- Outage retries without client-side logic
- Free Launch tier with 100 validations
- Transparent overage pricing
Limitations
- Webhook integration needed to benefit from retries
- Fewer regimes than VAT Sense
- Currency of prices not stated explicitly
Appears in
Vatstack alternatives and competitors
Alternatives to Vatstack: companies ranked in the same lists.
- VIES (VAT Information Exchange System)
HMRC Check a UK VAT number
Brønnøysund Register Centre (Enhetsregisteret)- Swiss UID register
VAT Sense
MonitorPay- Lookuptax
Fonoa
vatcheckapi
Abstract API (VAT Validation & Rates)- VATcomply
VATFind
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