Last updated: March 2026 · Zerostone Digital
This Privacy Policy explains how Zerostone Digital ("we", "us", "our") collects, uses, and protects your information when you use Hellhound (hellhound.dev).
We are committed to protecting your privacy and complying with the General Data Protection Regulation (GDPR) and applicable Swedish data protection law.
Zerostone Digital is the data controller for information collected through Hellhound.
Contact:
contact@zerostone.digital
Country of establishment: Sweden
We only collect what we need to provide the service.
What: Your email address and a hashed API key
Why: To identify your account and authenticate API requests
Legal basis: Contract — necessary to provide the service
Retention: Until you delete your account
What: For each monitored automation run — start time, end time, duration, output length, exit code, output format, first and last 200 characters of output as a preview, any error messages
Why: To detect anomalies and show you run history
Legal basis: Contract — necessary to provide the service
Retention: 90 days (Pro plan) or 1 year (Agency plan), then automatically deleted
What: Email addresses, Slack webhook URLs, phone numbers you configure as alert destinations
Why: To send you alerts when anomalies are detected
Legal basis: Contract — necessary to provide the service
Retention: Until you remove the alert configuration
What: We do not store your payment card details. Stripe processes all payments. We receive a customer ID and subscription status from Stripe.
Why: To manage your subscription
Legal basis: Contract
Retention: As required by Swedish accounting law (7 years)
What: IP addresses, request timestamps, HTTP method and path
Why: Security monitoring, debugging, abuse prevention
Legal basis: Legitimate interest
Retention: 30 days, then automatically deleted
What: A session cookie that keeps you logged in
Why: Authentication
Legal basis: Contract — necessary to use the dashboard
Retention: Expires after 7 days or on logout
We deliberately do not collect:
We share data with these third-party processors only:
Role: Infrastructure — hosts our application and database
Data shared: All data stored in our database
Location: United States
Safeguards: Standard Contractual Clauses (SCCs)
Role: Payment processor
Data shared: Email address, subscription information
Location: United States
Safeguards: Standard Contractual Clauses (SCCs)
Role: SMS delivery — only if you configure SMS alerts
Data shared: Phone numbers you add as alert destinations
Location: United States
Safeguards: Standard Contractual Clauses (SCCs)
We do not sell your data to anyone.
We do not share your data with advertisers.
We do not use your data to train AI models.
Our infrastructure providers are based in the United States. We rely on Standard Contractual Clauses (SCCs) approved by the European Commission as the legal mechanism for these transfers. You can request a copy of the relevant SCCs by emailing contact@zerostone.digital.
As an EU/EEA resident you have the following rights:
To exercise any of these rights, email contact@zerostone.digital. We will respond within 30 days.
We use one essential cookie: a session cookie that keeps you logged in to the dashboard. This cookie is necessary for the service to function. It is not used for tracking or advertising.
We do not use Google Analytics, Facebook Pixel, or any third-party tracking cookies.
We protect your data using:
No method of transmission over the internet is 100% secure. We take reasonable precautions but cannot guarantee absolute security.
We retain data for these periods:
When retention periods expire, data is automatically deleted.
Hellhound is a professional B2B tool not intended for anyone under 18. We do not knowingly collect data from children.
We will notify you by email if we make material changes to this policy. The "last updated" date at the top of this page reflects the most recent revision.
For privacy-related questions or to exercise your rights:
Email:
contact@zerostone.digital
Company: Zerostone Digital
Country: Sweden