1
Datadog Free tier

Cloud-scale monitoring and observability platform for infrastructure, applications, and logs.

Free for up to 5 hosts with basic metrics · Paid from $15/host/mo Engineering teams running complex, multi-service infrastructure at scale
Infrastructure Monitoring APM Log Management Dashboards
2
Sentry Free tier Open Source

Application monitoring platform focused on error tracking, performance monitoring, and session replay.

Free for 5K errors and 10K performance events/mo · Paid from $26/mo Development teams that need to catch, triage, and fix errors quickly
Error Tracking Session Replay Performance Monitoring Release Tracking
3
BetterStack Free tier

Uptime monitoring, log management, and incident management platform with a clean, modern interface.

Free for 10 monitors with 3-minute checks · Paid from $24/mo Teams that want uptime monitoring, logs, and status pages in one clean platform
Uptime Monitoring Log Management Status Pages Incident Management
4
Grafana Free Open Source

Open-source observability platform for metrics visualization, dashboards, and alerting from any data source.

Free Teams wanting open-source dashboards and visualization
Dashboards Alerting Data Sources Open Source
5
New Relic Free tier

Full-stack observability platform with APM, infrastructure, logs, and browser monitoring.

Free 100 GB/mo · Free Engineering teams wanting all-in-one observability
APM Infrastructure Logs Browser
6
Uptime Robot Free tier

Simple uptime monitoring service that checks your websites every 5 minutes and alerts you when they go down.

Free for 50 monitors · Free Anyone wanting simple, free uptime monitoring
HTTP Monitoring Status Pages Alerts API
7
Checkly Free tier

API and browser monitoring with Playwright tests, deployed via code.

Free for 5 checks · Free DevOps teams wanting monitoring as code
Monitoring as Code Playwright API Checks Alerts
8
Axiom Free tier

Log management and observability platform with unlimited data ingestion and powerful queries.

Free 500 GB/mo ingest · Free Developers wanting unlimited log ingestion
Unlimited Ingest Dashboards Alerts Traces
9
Cronitor Free tier

Monitoring for cron jobs, background tasks, and heartbeats with alerting.

Free for 5 monitors · Free Teams wanting cron job and background task monitoring
Cron Monitoring Heartbeats Alerts Status Pages
10
Highlight.io Free tier Open Source

Open-source full-stack monitoring with session replay, errors, and logs.

Free for 500 sessions/month · Paid from $50/mo Teams wanting session replay, error tracking, and logging in one open-source tool
Session replay Error monitoring Logging Open source

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