Open Source Monitoring & Observability Tools using ESLint

A curated collection of the best free and open source tools for knowing what a system is doing, covering metrics, logs, traces, uptime checks, dashboards and alerting using ESLint.

Uptime Kuma

Self-hosted monitoring tool that checks whether your sites, servers and containers are up and tells you the moment they are not.

Alternative to:

UptimeRobot

Self-hosted uptime monitoring with a clean dashboard

Stars
93,010
Forks
8,626
Last commit
21 hours ago

Grafana

Open source platform for querying, visualizing and alerting on metrics and logs wherever they are stored, with dashboards you share.

Alternative to:

Datadog

Unified observability for metrics, logs, traces, and more

Stars
77,560

OpenObserve

A single-binary observability platform for logs, metrics, traces and RUM, aimed at teams priced out of Datadog or Elasticsearch.

Alternative to:

Datadog

Petabyte-scale observability, without the massive bill.

Stars
22,532

VictoriaMetrics

Time series database and Prometheus replacement for teams storing large volumes of metrics without the memory and disk cost.

Alternative to:

Datadog

High-performance time series database for metrics and logs

Stars
17,926

Keep

An AIOps and alert management platform that deduplicates, correlates and automates alerts from every monitoring tool in one console.

Alternative to:

PagerDuty

Unify, automate, and elevate your monitoring workflow

Stars
12,452

Checkmate

A self-hosted uptime and infrastructure monitor with status pages and incident alerts, for teams watching servers they run themselves.

Alternative to:

UptimeRobot

Beautiful open-source monitoring for modern infrastructure

Stars
10,998

OpenReplay

Self-hosted session replay suite that shows developers what users did on a web app and what broke underneath.

Alternative to:

Hotjar

Self-hosted session replay with complete data control

Stars
13,057

Gatus

A developer-oriented health dashboard that runs HTTP, ICMP, TCP and DNS checks against your services and alerts before users notice.

Alternative to:

UptimeRobot

Advanced automated status page for real-time monitoring

Stars
12,428

HyperDX

An observability interface for ClickHouse that puts logs, metrics, traces, and session replays behind one search for engineers debugging production.

Alternative to:

Datadog

Full-stack observability without the enterprise price tag

Stars
9,974

Highlight

Fullstack monitoring for web teams, pairing session replay with error tracking, logs and traces behind a few lines of setup.

Alternative to:

Datadog

Real-time observability for modern web applications

Stars
9,385

Coroot

eBPF based observability that maps services and audits them automatically, for teams who cannot instrument every application by hand.

Alternative to:

Datadog

Full-stack observability without code changes

Stars
7,991

OneUptime

One platform for uptime monitoring, on-call, status pages, incidents, logs, traces and metrics, replacing a shelf of separate SaaS tools.

Alternative to:

Datadog

Comprehensive monitoring and incident management platform

Stars
7,765

Scanopy

Scans a network on a schedule and models what is actually running, for teams tired of hand-drawn diagrams that go stale.

Alternative to:

Lucidchart

Auto-generated network diagrams that stay current

Stars
5,913

Uptrace

OpenTelemetry-native APM that stores traces, metrics and logs in ClickHouse, giving teams one interface for monitoring and troubleshooting applications.

Alternative to:

Datadog

Open source observability platform for modern applications

Stars
4,307

Checkmk

IT infrastructure and application monitoring for physical, virtual, containerized and cloud environments, with a free community edition and commercial tiers.

Alternative to:

Datadog

Complete IT infrastructure monitoring made simple

Stars
2,623

Peekaping

Self-hosted uptime monitoring with an API-first Go server, status pages and more than twenty alert channels, aimed at DevOps teams.

Alternative to:

UptimeRobot

Self-hosted uptime monitoring you own and control

Stars
1,204

Temps

One self-hosted binary replaces the deployment platform, error tracker, analytics service, uptime monitor, email sender, and sandbox provider you pay for separately.

Alternative to:

Datadog

One self-hosted binary replaces Vercel, Sentry, and analytics tools

Stars
875

Wachd

Self-hosted alert intelligence that collects context around an incident and hands the on-call engineer a plain-English probable cause.

Alternative to:

PagerDuty

AI-powered root cause analysis for on-call alerts, self-hosted and air-gapped

Stars
42

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