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Open Alert Viewer vs karma: catalog facts
Open Alert Viewer	karma
Free Free and open source under the MIT licence.	Free Free and open source with no paid tier.
Linux, Android	Linux, Web, Self-hosted
One view for Prometheus, Nagios, Icinga and Zabbix alerts Runs on both Android and Linux desktop	Groups alerts to make large outages readable Web interface for creating and managing silences
Zabbix support is partial Only Basic Authentication for most backends	Only useful alongside Prometheus Alertmanager Requires Alertmanager 0.22.0 or newer
Downloadable app	Self-hosted
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.