Last updated: March 2026 · Zerostone Digital
These Terms of Service ("Terms") govern your use of Hellhound ("Service"), operated by Zerostone Digital ("we", "us", "our").
By creating an account or using the Service you agree to these Terms. If you do not agree, do not use the Service.
Hellhound is an automation monitoring service. It monitors automated processes, scripts, and workflows you configure, and sends alerts when anomalies are detected.
Hellhound is a monitoring and alerting tool only. It does not control, modify, or execute your automations. It observes and reports. All decisions about your automations remain yours.
You must provide a valid email address to create an account. You are responsible for keeping your API key confidential. You are responsible for all activity that occurs under your account.
You must be at least 18 years old to use this Service. The Service is intended for business use only.
One person or legal entity may not maintain more than one free account.
Paid plans are billed monthly through Stripe. All prices are in USD and exclude applicable taxes.
You authorise us to charge your payment method on a recurring monthly basis until you cancel.
Cancellation takes effect at the end of the current billing period. We do not offer prorated refunds for partial months except under our money-back guarantee.
Money-back guarantee: if you are not satisfied within the first 30 days of your first paid subscription, email contact@zerostone.digital for a full refund. After 30 days, no refunds are issued except where required by law.
We reserve the right to change pricing with 30 days notice by email. Continued use after the notice period constitutes acceptance of the new pricing.
You agree not to:
We reserve the right to suspend or terminate accounts that violate these terms without notice or refund.
Important
THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT ANY WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED.
WE SPECIFICALLY DISCLAIM ALL WARRANTIES INCLUDING BUT NOT LIMITED TO:
Hellhound is a monitoring tool that uses heuristic detection. It may miss some failures and may occasionally report anomalies that turn out not to be failures ("false positives"). You should not rely solely on Hellhound as your only means of ensuring your automations work correctly.
Important
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, ZEROSTONE DIGITAL SHALL NOT BE LIABLE FOR ANY:
ARISING FROM YOUR USE OF OR INABILITY TO USE THE SERVICE, EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
This includes but is not limited to:
IN NO EVENT SHALL OUR TOTAL LIABILITY TO YOU FOR ALL CLAIMS EXCEED THE AMOUNT YOU PAID TO US IN THE 12 MONTHS PRECEDING THE CLAIM.
Some jurisdictions do not allow the exclusion of certain warranties or limitation of liability for consequential damages. In such jurisdictions our liability is limited to the maximum extent permitted by law.
Important
You are solely responsible for:
Hellhound monitoring your automation does not transfer any responsibility for that automation to Zerostone Digital.
Your use of the Service is also governed by our Privacy Policy at hellhound.dev/privacy, which is incorporated into these Terms.
You represent that:
The Service, including its code, design, and documentation, is owned by Zerostone Digital and protected by intellectual property laws.
You retain ownership of your data and automations.
You grant us a limited licence to store and process your data for the purpose of providing the Service.
The Hellhound name and logo are trademarks of Zerostone Digital. You may not use them without written permission except to truthfully state that you use Hellhound.
We aim to provide a reliable service but do not guarantee 100% uptime. We may perform maintenance that temporarily makes the Service unavailable.
If the Service is unavailable, your automations continue to run — only monitoring is affected.
We will not be liable for damages caused by Service downtime.
You may cancel your account at any time from your account settings or by emailing contact@zerostone.digital.
We may suspend or terminate your account if:
On termination, your data will be deleted within 30 days except where retention is required by law.
We may update these Terms. We will notify you by email at least 14 days before material changes take effect.
Continued use of the Service after changes take effect constitutes acceptance. If you do not agree to updated Terms, you may cancel your account before the changes take effect.
These Terms are governed by the laws of Sweden.
Any dispute arising from these Terms shall first be attempted to be resolved by contacting contact@zerostone.digital.
If a dispute cannot be resolved informally, it shall be subject to the exclusive jurisdiction of the Swedish courts.
If you are an EU consumer, you may also use the European Commission's Online Dispute Resolution platform at ec.europa.eu/consumers/odr.
Severability: If any provision of these Terms is found unenforceable, the remaining provisions continue in effect.
Entire agreement: These Terms and the Privacy Policy constitute the entire agreement between you and Zerostone Digital regarding the Service.
No waiver: Our failure to enforce any right or provision does not constitute a waiver of that right or provision.
Zerostone Digital
contact@zerostone.digital
Sweden