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Subprocessors

Last reviewed 6 October 2026

These are the providers we currently use to deliver GuardRailPay, as referred to in section 9 of our Privacy Policy. The list may change; we will update this page when it does.

ProviderPurposeData involved (high level)Region where known
StripePayment processingPayment and payout details, transaction records, payer and payee contact detailsSee provider
SupabaseDatabase, authentication and file storageAccount data, business records, uploaded documentsEU/UK regions
RailwayBackend application hostingData processed by the backend while serving requests and jobsEurope
VercelWeb application hostingRequest metadata and pages served to your browserSee provider
CloudflareDNS and email routingDNS queries, email routing metadataSee provider
ResendTransactional and inbound emailEmail addresses, message content and delivery metadataEU (eu-west-1)
OpenAIDocument and reply processingDocument and message content submitted for processingSee provider

Questions about this list: legal@guardrailpay.com.

GuardRailPay

Automated invoice follow-up for small businesses and accountants.

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© 2026 MATTECH OÜ, trading as GuardRailPay. Registry code 17589238. Narva mnt 86-3, Kesklinna linnaosa, Tallinn, Harju maakond, 10150, Estonia.