Open Source Monitoring Apps
Discover best open source monitoring tools to track system health, performance & infrastructure. Ensure uptime, identify bottlenecks & improve reliability.
Apps in Monitoring
Language
License
Uptrace
Devops · Monitoring
Unified open-source APM that collects OpenTelemetry traces, metrics, and logs into a single self-hosted platform backed by ClickHouse.
Hyvor Relay
AI Development · Devops · Monitoring
Self-hosted, open-source email API that automates DNS, manages SMTP delivery, and provides deep observability — replacing SES, Mailgun, and SendGrid with infrastructure you fully own.
tirreno
Monitoring · Security
Embed security inside your product — detect threats, fraud, and abuse in real time at the application layer
abtop
Developer Tools · Monitoring
Like htop, but for your AI coding agents — monitor Claude Code, Codex CLI, and OpenCode sessions, tokens, context windows, rate limits, and orphan ports all from one terminal screen.
Requestly
Developer Tools · Monitoring · Security
Open-source HTTP interceptor and API mocker trusted by 300,000+ developers — intercept, modify, and mock HTTP traffic from browser extensions or desktop without complex proxy setup.
superlog
AI Agents · Monitoring
Open-source agentic observability that ingests OpenTelemetry signals, groups them into incidents, and deploys AI agents to investigate and fix your production bugs automatically.
Pezzo
AI Development · Monitoring
Open-source LLMOps platform for prompt management, AI observability, intelligent caching, and real-time cost tracking across LLM providers.
Operational
Analytics · Automation · Monitoring
Open-source event tracker with real-time push notifications and action buttons for tech founders.
TensorZero
Ab Testing Experimentation · AI Development · Monitoring
TensorZero unifies the LLM gateway, observability, evaluation, optimization, and experimentation stack behind a single OpenAI-compatible API, built in Rust for sub-millisecond p99 latency.
GPU Hot
Devops · Monitoring
Real-time NVIDIA GPU monitoring dashboard — self-hosted, scale from 1 to 100+ GPUs with sub-second metrics and no cloud dependency.
NeoHtop
Monitoring
A cross-platform desktop system monitor built with Rust, Tauri, and Svelte that gives real-time process visibility with a modern, themable UI.
Trench
Analytics · Data Engineering · Monitoring
Open-source event tracking infrastructure built on Kafka and ClickHouse that handles thousands of events per second on a single node, with full Segment API compatibility and no cookies.
Statusnook
Monitoring
Deploy a self-hosted status page with endpoint monitoring and automatic HTTPS in minutes, with no external dependencies required.
Portpal
Developer Tools · Monitoring
A native desktop dashboard that shows every port your machine is listening on, kills the process blocking it in one click, and visualizes how your services are actually connected.
About Monitoring
Effective monitoring is crucial for maintaining reliable and performant software. These applications provide real-time visibility into the behavior of your systems, allowing you to quickly identify and resolve issues before they impact users. They move beyond simple uptime checks, offering deep insights into resource utilization, application response times, and error rates.
Typical features include alerting based on customizable thresholds, dashboarding for data visualization, and log aggregation to centralize troubleshooting information. Many solutions also feature historical data analysis for trend identification and capacity planning, as well as integrations with other development tools. Common data sources include CPU usage, memory consumption, network traffic, disk I/O, and application-specific metrics.
This category matters because it directly addresses critical problems like downtime, performance bottlenecks, and security threats. By proactively detecting anomalies, monitoring tools enable faster mean time to resolution (MTTR) and improved user experience. Automated alerts reduce the need for manual intervention, freeing up developers to focus on building features instead of firefighting. Robust monitoring is also essential for compliance and auditing in regulated industries.
