About Cavren
About Cavren: a personal safety app for Europe by Donckeybarn Ltd (United Kingdom). Our mission, our principles and our legal details.
Cavren is built and operated by Donckeybarn Ltd, a UK private limited company (Companies House 16868797) headquartered at 71-75 Shelton Street, Covent Garden, London WC2H 9JQ. Founded by M.C. Gietzelt in 2026. The mission: activate help quickly, preserve evidence accurately, coordinate volunteer responders across Europe without replacing emergency services.
Cavren is a safety support tool, not an emergency service.
About Cavren
Mission
Cavren exists to make personal safety tools accessible everywhere in Europe, regardless of language, income, or device. The Silver tier — full SOS, family map, evidence recording, and community helpers — stays free forever. Paid tiers fund operations and operator monitoring. We do not sell user data, do not run third-party advertising, and do not share location with anyone the user has not explicitly chosen.
Who is responsible for Cavren
Cavren is developed and operated by Donckeybarn Ltd, a private limited company registered in the United Kingdom (Companies House 16868797 ). Cavren was founded by M.C. Gietzelt. All product, security, and privacy decisions are reviewed by M.C. Gietzelt personally; Cavren has no anonymous contributors making consequential changes. For privacy or GDPR requests contact legal@cavren.org . For general support contact support@cavren.org .
Design principles
Privacy by design — chat messages are end-to-end encrypted, deleted from cloud relays after delivery. Primary data storage in EU data centres. Anti-stalkerware bidirectional consent for all location sharing.
Designed to fail safe — offline fallbacks, 112 button always one tap away, helper search expanding to 5,000 km, admin escalation for unresolved incidents.
No overpromise — Cavren is a safety support tool, not an emergency service or medical device. We document exactly what Cavren can and cannot do.
European focus — 50 languages including the 24 official EU languages, GDPR-compliant data residency, EU Framework Directive 89/391/EEC support for lone worker compliance.
No anonymous contributors — all consequential changes are reviewed by M.C. Gietzelt personally; we publish commit history and changelog publicly.
Registered office
Donckeybarn Ltd 71-75 Shelton Street, Covent Garden London WC2H 9JQ United Kingdom
Documents
Privacy Policy, Terms of Service, Cookie Policy, Data Retention Policy, Contact, and the full feature documentation are accessible from the site navigation.
Legal
Cavren is developed by Donckeybarn Ltd (United Kingdom).
© 2026 Cavren · Donckeybarn Ltd (UK). Cavren is not an emergency service. Always call 112 in case of immediate danger.