Zero context
No logs, incident details, or sensitive infrastructure data live on a personal device.
Built for the moment it matters
Wake the right person.
Nothing else.
Hark is open-source, zero-context paging for teams that cannot afford to miss a critical alert.
High certainty
Native notifications built to break through the noise when an incident is real.
Open by design
Inspect it, self-host it, and keep ownership of your alerting path.
A calm, dedicated receiver
The alert is clear.
The response is immediate.
Hark gives on-call engineers only what they need to take ownership—without exposing the rest of your incident context.
A deliberately narrow system
Paging is not
a chat app.
Trigger
Your monitoring system calls Hark when an incident needs attention.
Route
Hark reaches the relevant on-call engineer through a dedicated mobile app.
Respond
The engineer acknowledges the page, then investigates in the tools that already hold the context.
A focused control plane
Route pages.
Know who responded.
The lightweight admin console gives incident commanders a direct view of subscribers, ongoing alerts, and acknowledgements.
Self-hosted and transparent
Own the path
between alert and action.
Hark includes a Go backend, a Flutter app for iOS and Android, passkey authentication, and Firebase Cloud Messaging delivery.
Read the source on GitHub