Every company that handles your data, in plain language.
As a data controller under UK and EU GDPR, Keryth is responsible for your personal data. Where we engage third-party services — subprocessors — that handle data on our behalf, we are required to disclose them. We do this not merely because the law requires it, but because we think you have a right to know exactly who touches your data.
We have deliberately kept this list short. Every subprocessor was chosen partly on privacy grounds. We do not use Google Analytics, Meta Pixel, or any advertising technology.
Infrastructure & storage
Provider
Purpose
Location
Hetzner Online GmbH
Privacy policy ↗
Application servers, databases, and object storage. All Keryth application infrastructure runs on Hetzner. Your documents and account data reside here.
🇩🇪 Germany (EU)
SiteGround
Privacy policy ↗
Hosting for the Keryth public website (keryth.com). Marketing pages only — no manuscript or account data is stored here.
🇬🇧 United Kingdom
Artificial intelligence
Provider
Purpose
Location
Mistral AI SAS
Privacy policy ↗
AI inference — the language model that powers Keryth’s writing assistant. Mistral AI is a French company. Under our data processing agreement, your content is not used to train their models. We are transparent about this rather than obscuring which AI provider we use: it is not OpenAI.
🇫🇷 France (EU)
Payments & billing
Provider
Purpose
Location
Mollie B.V.
Privacy policy ↗
Payment processing. Mollie handles card and bank payment transactions. Keryth never stores your card details — these are handled entirely by Mollie. Mollie is a Dutch company regulated by the Dutch National Bank.
🇳🇱 Netherlands (EU)
Quaderno
Privacy policy ↗
VAT compliance and invoice generation. Quaderno calculates the applicable VAT for your location and generates invoices. It processes your country of residence and transaction amount for this purpose. Quaderno is a Spanish company.
🇪🇸 Spain (EU)
Provider
Purpose
Location
mailcow (self-hosted)
About ↗
Transactional email (account confirmation, password reset, billing receipts). We run our own mail server using the open-source mailcow stack. Your email address is not shared with any third-party mail provider.
🇩🇪 Germany (EU)