Free uptime monitoring for websites and APIs with 5-minute checks and email alerts
Lightweight eBPF flow engine for OpenWrt and Linux routers with real-time traffic monitoring and kernel shaping
Stage
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Founded
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Based in
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Pricing model
Free
Freemium
Pricing
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Free: Community plan with 2,600+ open source rules and core features. Pro Monthly: $3.99/mo with 3,800+ rules and weekly updates. Pro Annual: $29.99/yr with all Pro entitlements. Pro Lifetime: $69.99 one-time with permanent license and 1 year of rule updates.
Key features
URL and API uptime monitoring with configurable 1–60 minute intervals
Email down and recovery alerts
SSL certificate expiry warnings at 30 and 7 days
Public status pages
Ping history and uptime analytics
Maintenance window scheduling
Webhook URL configuration for status changes
Team management
Repeat reminder alerts for ongoing downtime
Real-time eBPF network telemetry with zero-copy line rate processing
Zero-agent device profiling using DHCP fingerprinting and mDNS
Encrypted traffic identification without SSL decryption
Sub-second quality telemetry with TCP/UDP RTT monitoring
Local timeseries storage in SQLite or ClickHouse databases
Per-device bandwidth ceilings and isolation with HTB
Application-aware QoS priority queues with kernel HTB classes
Sub-second policy synchronization with automatic kernel fail-safe rollback
Flow tracing from socket to BGP origin with latency tracking
Privacy-first architecture extracting only metadata, no packet payloads
What makes it different
Completely free with no credit card required
Monitor any HTTP endpoint including websites, APIs, and health checks
Public status pages with no login required
Fully self-hosted with zero mandatory cloud sync or telemetry fees
Lightweight eBPF implementation using only 1.2% CPU and 18MB RAM
Open source core engine with optional Pro rules subscription model
99.4% application identification accuracy without decrypting encrypted traffic
Complete privacy by design storing only flow headers and SNI, never payloads