Kuvasz

Kuvasz is an open-source, self-hosted uptime and SSL monitoring service that helps teams track availability, response times, and certificate health. It provides a modern web UI, a full REST API, and integrations for metrics and alerting to fit into existing observability stacks.

Key Features

• HTTP(S) monitoring with configurable intervals, custom headers, body, status matching, and response time checks
• SSL/TLS certificate monitoring with advance expiry alerts
• Push (heartbeat/cron) monitors for scheduled jobs and non-pollable checks
• Per-monitor notification channels including email, Discord, Slack, Telegram, and PagerDuty
• Brandable public or private status pages for communicating incidents
• Full REST API for managing monitors, checks, and status pages programmatically
• Metrics exporters for Prometheus and OpenTelemetry (OTLP) for integration with existing monitoring
• YAML-based IAC support and backup/export capabilities for configuration-as-code
• Distributed deployment as a single Docker image; requires PostgreSQL as the primary data store

Use Cases

• Monitor websites, APIs, and services for uptime, latency regressions, and SSL expirations
• Publish status pages to inform customers or internal teams about incidents and maintenance
• Export metrics to Prometheus or OTLP pipelines and integrate alerts into existing incident workflows

Limitations and Considerations

• Native port, DNS, and domain-expiration monitoring are not available or are limited compared to some hosted competitors
• ICMP (ping) and some advanced network checks are not first-class features out of the box
• SMS/voice notifications require external paid providers; some integrations are planned but may be incomplete
• High-frequency checks (e.g., 5s intervals) increase resource usage; plan JVM and database capacity accordingly

Kuvasz is a focused uptime and certificate monitoring solution that integrates with observability tooling and supports configuration-as-code. It is well suited for teams that need status pages, per-monitor notifications, and Prometheus/OTLP integration while operating in self-hosted environments.