Best Free Monitoring Tools

Uptime and status page monitoring — free plan: 3 monitors (uptime, keyword, heartbeat), 3-minute check interval, 2 team members, 1 status page, SSL monitoring, multi-location checks, email/Slack/Discord alerts

Labelled cron_monitor. We read that on 2026-09-01 from https://onlineornot.com/pricing, where it says: “Cron Job Monitoring”. How we use this

Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments

Labelled cron_monitor. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Cron Monitoring 1 cron monitor”. How we use this

Website and cron monitoring - 2 monitors free

Labelled cron_monitor. We read that on 2026-09-01 from https://sitesure.net, where it says: “It works for cron jobs and any other scheduler.”. How we use this

Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign up

Labelled cron_monitor. We read that on 2026-09-01 from https://deadmanssnitch.com/, where it says: “If they don't execute when they should, Dead Man's Snitch alerts you.”. How we use this

Cron job and scheduled task monitoring — 20 monitors, 100 log entries per job, email/webhook/Slack/Telegram alerts, API access. Also free for open-source projects (Business plan)

Labelled cron_monitor. We read that on 2026-09-01 from https://healthchecks.io/pricing/, where it says: “Fully Managed, Worry-Free Cron Job Monitoring Service”. How we use this

Uptime monitoring — 10 monitors (HTTP/heartbeat/API), 5-minute check interval, 3 regions, 3-month history, 3 status pages

Labelled cron_monitor. We read that on 2026-09-01 from https://pulsetic.com/pricing/, where it says: “Cron Monitoring”. How we use this

Cron job and uptime monitoring — free Hacker plan: 5 monitors, 5-minute check frequency, email, Slack, and webhook alerts, 1 status page (50 subscribers), 12-month data retention, single user

Labelled cron_monitor. We read that on 2026-09-01 from https://cronitor.io/pricing, where it says: “Cron Job Monitoring”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled apm_traces. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “New Relic, Datadog, and Dynatrace cost comparison”. How we use this

A complete Real-Time monitoring dashboard in less than one minute with a free forever tier.

Labelled apm_traces. We read that on 2026-09-01 from https://www.inspector.dev, where it says: “the exact code changes needed to fix bugs and improve application performance while staying in your agentic workflow. With the AI integration you can”. How we use this

Application performance monitoring — free for first 100,000 traces/month.

Labelled apm_traces. We read that on 2026-09-01 from https://www.skylight.io/, where it says: “Skylight is a smart profiler for Ruby and Rails applications.”. How we use this

Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments

Labelled apm_traces. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Tracing 5M spans”. How we use this

Free OSS (Apache 2.0). CNCF graduated distributed tracing system. End-to-end request tracing, performance optimization, root cause analysis. OpenTelemetry compatible Best for open source projects.

Labelled apm_traces. We read that on 2026-09-01 from https://www.jaegertracing.io/, where it says: “open source, distributed tracing platform”. How we use this

Free tier with 10K metric series, 50 GB logs, 50 GB traces, 14-day retention, 3 users

Labelled apm_traces. We read that on 2026-09-01 from https://grafana.com/pricing/, where it says: “Fully-managed, easy-to-use, highly-scalable, and cost-effective distributed tracing backend.”. How we use this

OpenTelemetry-native observability with logs, metrics and traces in one tool. The community edition is free to self-host. SigNoz Cloud starts at $49/month including $49 of usage credit, then $0.3/GB ingested for logs and traces (15-day retention) and $0.1 per million metric samples; eligible startups pay $19/month for the first 12 months. Best for startups.

Labelled apm_traces. We read that on 2026-09-01 from https://signoz.io/pricing/, where it says: “APM & Distributed Tracing Out of Box”. How we use this

Application monitoring (APM, errors, logging) — free plan: 50,000 requests/month, 1 GB logging/month, 5-day data retention, unlimited apps and hosts. Extended free limits for OSS and humanitarian projects Best for open source projects and unlimited usage needs.

Labelled apm_traces. We read that on 2026-09-01 from https://www.appsignal.com/plans, where it says: “All-in-one APM The complete monitoring toolkit for developers.”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled host_metrics. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “With New Relic usage-based pricing , you no longer have to count hosts or CPUs.”. How we use this

Uptime and status page monitoring — free plan: 20 monitors (HTTP, port, ping, keyword), 5-minute check interval, 1 basic status page with real-time updates and subscriber notifications, 1 seat, 1 server monitoring agent, email and webhook alerts Note — 2026-04-21: Hyperping free plan limits restructured: monitor cap raised from 5 to 20 (HTTP, port, ping, keyword), but the check interval slowed from 3 minutes to 5 minutes. Free plan now also includes 1 seat and 1 server monitoring agent. Trade-off: 4x more endpoints can be monitored, at the cost of slower check granularity. Source ↗

Labelled host_metrics. We read that on 2026-09-01 from https://hyperping.com/pricing, where it says: “SERVER MONITORING Server agents A lightweight agent that reports CPU, memory, disk and network from your servers.”. How we use this

Observability platform — Logs: 500 MB/day ingestion, 7-day retention. Monitoring: 3 hosts, 3 containers/host, 30-min data retention, 1 alert rule. Volume-based pricing, no per-host charges on paid plans

Labelled host_metrics. We read that on 2026-09-01 from https://sematext.com/pricing, where it says: “install the agent Sematext will start providing valuable performance insights.”. How we use this

Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules. Best for unlimited usage needs.

Labelled host_metrics. We read that on 2026-09-01 from https://bleemeo.com, where it says: “CPU, memory, disk, and network metrics collected every 10 seconds”. How we use this

Server and website monitoring (formerly Nixstats) — free Lite plan: 1 server monitor, 5 site monitors, 10-minute check interval, 24-hour data retention, email alerts

Labelled host_metrics. We read that on 2026-09-01 from https://360monitoring.com/pricing/, where it says: “Website Monitoring Server Monitoring Blocklist Monitoring Full Site Check”. How we use this

Infrastructure monitoring free for up to 5 hosts with 1-day metric retention

Labelled host_metrics. We read that on 2026-09-01 from https://www.datadoghq.com/pricing/, where it says: “Standard Events and Metrics Up to 5 hosts”. How we use this

Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub!

Labelled host_metrics. We read that on 2026-09-01 from https://www.netdata.cloud/, where it says: “Metrics Management eBPF Monitoring”. How we use this

Free server monitoring service with alerts and metrics. Up to 25 servers and 25 uptime monitoring instances.

Labelled host_metrics. We read that on 2026-09-01 from https://syagent.com/, where it says: “Monitor Linux servers, processes, disks, network”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled error_tracking. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “Core users—starting at $49 per user— can access everything basic users can plus telemetry data in their IDE via the New Relic CodeStream integration, error tracking, logs, and more.”. How we use this

A complete Real-Time monitoring dashboard in less than one minute with a free forever tier.

Labelled error_tracking. We read that on 2026-09-01 from https://www.inspector.dev, where it says: “Never be the last to know your app broke”. How we use this

Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments

Labelled error_tracking. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Errors 50K $0.00”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled error_tracking. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “AI‑native error tracking built on Better Stack”. How we use this

Application monitoring (APM, errors, logging) — free plan: 50,000 requests/month, 1 GB logging/month, 5-day data retention, unlimited apps and hosts. Extended free limits for OSS and humanitarian projects Best for open source projects and unlimited usage needs.

Labelled error_tracking. We read that on 2026-09-01 from https://www.appsignal.com/plans, where it says: “help your codebase grow from your first error to your second database cluster”. How we use this

Superseded: As of 2026-08-28, pingmeter.com reads: Free account is limited to accounts with 1 category and less than 5 uptime monitors. It exclude pro features such as sms/voice notification, scheduling and recovery actions. We are not publishing our stored Pingmeter.com terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier now has restrictions: limited to accounts with 1 category and less than 5 uptime monitors. SMS/voice notification, scheduling and recovery actions are excluded from the free tier. Source ↗

Labelled uptime_check. We read that on 2026-09-01 from https://pingmeter.com/, where it says: “Multiple servers in different countries will scan your website and furnish a performance report for you”. How we use this

Uptime and status page monitoring — free plan: 3 monitors (uptime, keyword, heartbeat), 3-minute check interval, 2 team members, 1 status page, SSL monitoring, multi-location checks, email/Slack/Discord alerts

Labelled uptime_check. We read that on 2026-09-01 from https://onlineornot.com/pricing, where it says: “Website down checker”. How we use this

Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email. Best for unlimited usage needs.

Labelled uptime_check. We read that on 2026-09-01 from https://pingbreak.com/, where it says: “Pingbreak checks all of your websites each minute and alerts you instantly by Direct Message (DM) or slack, discord, mattermost, mail notifications.”. How we use this

Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments

Labelled uptime_check. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Uptime Monitoring 1 uptime monitor”. How we use this

60 uptime monitors, 5-minute interval. Email, Slack alerts.

Labelled uptime_check. We read that on 2026-09-01 from https://downtimemonkey.com/, where it says: “Websites checked every minute.”. How we use this

Website and cron monitoring - 2 monitors free

Labelled uptime_check. We read that on 2026-09-01 from https://sitesure.net, where it says: “Sitesure will check your website, API endpoint, or TCP service at a regular interval from around the world and notify you when the response is not expected.”. How we use this

Uptime Monitoring free for up to 100,000 events for unlimited projets and unlimited status pages. Best for unlimited usage needs.

Labelled uptime_check. We read that on 2026-09-01 from https://phare.io/, where it says: “Uptime monitoring, alerts, incidents AI”. How we use this

Uptime and status page monitoring — free plan: 20 monitors (HTTP, port, ping, keyword), 5-minute check interval, 1 basic status page with real-time updates and subscriber notifications, 1 seat, 1 server monitoring agent, email and webhook alerts Note — 2026-04-21: Hyperping free plan limits restructured: monitor cap raised from 5 to 20 (HTTP, port, ping, keyword), but the check interval slowed from 3 minutes to 5 minutes. Free plan now also includes 1 seat and 1 server monitoring agent. Trade-off: 4x more endpoints can be monitored, at the cost of slower check granularity. Source ↗

Labelled uptime_check. We read that on 2026-09-01 from https://hyperping.com/pricing, where it says: “Hyperping bundles uptime monitoring, on-call and a status page on your own domain — in one plan.”. How we use this

Uptime monitoring — 10 monitors, 5-min intervals, 1 page speed monitor, 1 domain monitor, 1 SSL monitor, email alerts, basic integrations

Labelled uptime_check. We read that on 2026-09-01 from https://www.statuscake.com/pricing/, where it says: “Uptime Monitoring”. How we use this

Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules. Best for unlimited usage needs.

Labelled uptime_check. We read that on 2026-09-01 from https://bleemeo.com, where it says: “with uptime checks from global probes.”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled uptime_check. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “The most reliable uptime monitoring”. How we use this

Uptime monitoring — 10 monitors (HTTP/heartbeat/API), 5-minute check interval, 3 regions, 3-month history, 3 status pages

Labelled uptime_check. We read that on 2026-09-01 from https://pulsetic.com/pricing/, where it says: “We'll alert you if your website is down”. How we use this

Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages.

Labelled uptime_check. We read that on 2026-09-01 from https://monitormonk.com, where it says: “MonitorMonk keeps an eye on your websites and services 24/7”. How we use this

Server and website monitoring (formerly Nixstats) — free Lite plan: 1 server monitor, 5 site monitors, 10-minute check interval, 24-hour data retention, email alerts

Labelled uptime_check. We read that on 2026-09-01 from https://360monitoring.com/pricing/, where it says: “Your 360° server uptime solution.”. How we use this

Get 20 uptime monitors with 5-minute intervals and a customizable status page—even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. No credit card needed to get started. Best for unlimited usage needs.

Labelled uptime_check. We read that on 2026-09-01 from https://uptimeobserver.com, where it says: “UptimeObserver monitors websites, APIs, DNS records, Server Ports, Domain Name Expiry and SSL Expiry for downtime and performance issues, alerting you when something goes wrong.”. How we use this

Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. Pro plan is offered to open-source projects and non-profits free of charge.

Labelled uptime_check. We read that on 2026-09-01 from https://pingpong.one/, where it says: “Measure the performance and uptime of your website or API and showcase the result on your status page. If your site goes down, you will be notified instantly.”. How we use this

Uptime monitoring with support for large projects and teams. Free tier: 1 HTTP monitor, 1 DNS monitor, and 1 status page. Note — 2026-04-12: Free tier HTTP monitors reduced from 10 to 1 Source ↗

Labelled uptime_check. We read that on 2026-09-01 from https://servervana.com, where it says: “Uptime monitoring.”. How we use this

Cron job and uptime monitoring — free Hacker plan: 5 monitors, 5-minute check frequency, email, Slack, and webhook alerts, 1 status page (50 subscribers), 12-month data retention, single user

Labelled uptime_check. We read that on 2026-09-01 from https://cronitor.io/pricing, where it says: “Uptime Monitoring”. How we use this

50 uptime monitors, 5-minute check intervals, 3-month log retention, email alerts. Personal/non-commercial use only on free tier Best for personal projects.

Labelled uptime_check. We read that on 2026-09-01 from https://uptimerobot.com/pricing/, where it says: “Uptime monitoring”. How we use this

Free server monitoring service with alerts and metrics. Up to 25 servers and 25 uptime monitoring instances.

Labelled uptime_check. We read that on 2026-09-01 from https://syagent.com/, where it says: “Uptime HTTP, PING, PUSH”. How we use this

Free monitoring for five websites, 3-minute intervals, public statuspage.

Labelled uptime_check. We read that on 2026-09-01 from https://uptimetoolbox.com/, where it says: “We're now monitoring your site. Besides letting you know if your site goes down, we'll also keep an eye on your domain expirations and SSL certificates”. How we use this

Website uptime monitoring — free plan: 1 website, 5-minute check interval, basic uptime monitoring, email alerts. No credit card required

Labelled uptime_check. We read that on 2026-09-01 from https://www.uptimia.com/pricing, where it says: “Uptime monitoring pricing that costs less than downtime.”. How we use this

Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 server, 10 uptime, and 10 domain for free.

Labelled uptime_check. We read that on 2026-09-01 from https://dicloud.net/sweetuptime-server-uptime-monitoring/, where it says: “Get notified when your website & server is down before your customer got angry”. How we use this

Always Free: all non-chargeable Google Cloud metrics, first 1M monitoring API calls/month. Dashboards, alerting, and uptime checks for GCP resources

Labelled uptime_check. We read that on 2026-09-01 from https://cloud.google.com/monitoring/pricing, where it says: “Execution of Monitoring uptime checks $0.30/1,000 executions”. How we use this

Grafana OSS — the self-hosted dashboarding and alerting front end, free under AGPL-3.0-only with Apache-2.0 exceptions. Unifies 150+ data sources into one dashboard and supports observability-as-code. You set up, administer and maintain the installation yourself; Grafana Cloud is the hosted product and is priced separately. Best for open source projects.

Labelled dashboards. We read that on 2026-09-01 from https://grafana.com/oss/grafana/, where it says: “Easily collect, correlate, and visualize data with beautiful dashboards using Grafana — the open source data visualization and monitoring solution”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled synthetic_check. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “Additional synthetics checks beyond the amount included in your edition are available at $0.005 per check.”. How we use this

Uptime and status page monitoring — free plan: 3 monitors (uptime, keyword, heartbeat), 3-minute check interval, 2 team members, 1 status page, SSL monitoring, multi-location checks, email/Slack/Discord alerts

Labelled synthetic_check. We read that on 2026-09-01 from https://onlineornot.com/pricing, where it says: “Monitoring Heartbeat Monitoring Website Monitoring Synthetic monitoring Status Pages Pricing Changelog Support Schedule a demo”. How we use this

Automated API testing and monitoring. Free plans for teams and individuals.

Labelled synthetic_check. We read that on 2026-09-01 from https://assertible.com, where it says: “With Assertible, you can run your API tests against any environment, like staging or production .”. How we use this

Observability platform — Logs: 500 MB/day ingestion, 7-day retention. Monitoring: 3 hosts, 3 containers/host, 30-min data retention, 1 alert rule. Volume-based pricing, no per-host charges on paid plans

Labelled synthetic_check. We read that on 2026-09-01 from https://sematext.com/pricing, where it says: “Start free trial Synthetics Monitor performance and availability of your site and APIs.”. How we use this

Cron job and uptime monitoring — free Hacker plan: 5 monitors, 5-minute check frequency, email, Slack, and webhook alerts, 1 status page (50 subscribers), 12-month data retention, single user

Labelled synthetic_check. We read that on 2026-09-01 from https://cronitor.io/pricing, where it says: “events free $10 /mo per 100,000 events Custom Synthetic browser checks × $1 /mo per 1,000 checks Custom Fastest check”. How we use this

Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub!

Labelled synthetic_check. We read that on 2026-09-01 from https://www.netdata.cloud/, where it says: “Infrastructure Monitoring Container Monitoring Synthetic Checks Application Performance Database Monitoring Troubleshooting”. How we use this

Always Free: all non-chargeable Google Cloud metrics, first 1M monitoring API calls/month. Dashboards, alerting, and uptime checks for GCP resources

Labelled synthetic_check. We read that on 2026-09-01 from https://cloud.google.com/monitoring/pricing, where it says: “Execution of Monitoring Synthetic Monitors $1.20/1,000 executions”. How we use this

Status page monitoring, 3 monitors free

Labelled upstream_status_watch. We read that on 2026-09-01 from https://statusgator.com/, where it says: “Status aggregation Aggregate the status of all vendors to a single page”. How we use this

A status page of status pages. Could you track the status pages of your upstream providers?

Labelled upstream_status_watch. We read that on 2026-09-01 from https://www.statuspile.com/, where it says: “Your status page of status pages (open sourced and free to use)”. How we use this

Cloud and SaaS status page aggregator — 5 monitors and 2 notification channels (Slack and Discord) are free forever. Note — 2026-04-12: Free tier monitors reduced from 20 to 5 Source ↗

Labelled upstream_status_watch. We read that on 2026-09-01 from https://incidenthub.cloud/, where it says: “The vendor outage monitor and status page aggregator that watches 1125+ third-party services in real time”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled log_management. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “Advanced logs obfuscation: Create and track rules directly in the log management UI and mask or hash sensitive log data.”. How we use this

The Elastic Stack — Elasticsearch, Kibana, ingest and basic security — self-managed at no cost on the Free and Open tier under the Elastic License and SSPL, with community support. Platinum (existing customers only) and Enterprise are custom-priced and add machine learning, cross-cluster replication, searchable snapshots and 24/7 support. Elastic Cloud Serverless and Hosted are billed separately by usage or resources. Best for open source projects.

Labelled log_management. We read that on 2026-09-01 from https://www.elastic.co/pricing/self-managed, where it says: “Observability APM, logging, and metrics via Kibana Discover and Dashboards”. How we use this

Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments

Labelled log_management. We read that on 2026-09-01 from https://sentry.io/pricing/, where it says: “Logs 5GB 5GB +$0.50/GB additional”. How we use this

Observability platform — Logs: 500 MB/day ingestion, 7-day retention. Monitoring: 3 hosts, 3 containers/host, 30-min data retention, 1 alert rule. Volume-based pricing, no per-host charges on paid plans

Labelled log_management. We read that on 2026-09-01 from https://sematext.com/pricing, where it says: “Sematext is a fully managed log management solution, with built-in replication,”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled log_management. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “3 GB logs retained for 3 days”. How we use this

Free tier with 10K metric series, 50 GB logs, 50 GB traces, 14-day retention, 3 users

Labelled log_management. We read that on 2026-09-01 from https://grafana.com/pricing/, where it says: “Fully-managed log aggregation system powered by Grafana Loki.”. How we use this

OpenTelemetry-native observability with logs, metrics and traces in one tool. The community edition is free to self-host. SigNoz Cloud starts at $49/month including $49 of usage credit, then $0.3/GB ingested for logs and traces (15-day retention) and $0.1 per million metric samples; eligible startups pay $19/month for the first 12 months. Best for startups.

Labelled log_management. We read that on 2026-09-01 from https://signoz.io/pricing/, where it says: “Log Management”. How we use this

Observability platform — 500 GB ingest/month, 25 GB storage, 30-day retention, 2 datasets, 1 user, 10 GB-hrs/mo query compute, 256 fields/dataset, 3 monitors, Email/Discord notifiers only

Labelled log_management. We read that on 2026-09-01 from https://axiom.co/pricing, where it says: “Log management”. How we use this

Application monitoring (APM, errors, logging) — free plan: 50,000 requests/month, 1 GB logging/month, 5-day data retention, unlimited apps and hosts. Extended free limits for OSS and humanitarian projects Best for open source projects and unlimited usage needs.

Labelled log_management. We read that on 2026-09-01 from https://www.appsignal.com/plans, where it says: “Long-term log storage Automatically export and store logs from AppSignal to your S3-compatible storage for long-term retention.”. How we use this

Simple interface for alerting and on-call management. Free up to 5 users.

Labelled on_call_response. We read that on 2026-09-01 from https://pagertree.com/, where it says: “Centralize alerts and notify the right people at the right time.”. How we use this

Incident management platform — free Basic plan: up to 5 users, Slack or Microsoft Teams native incident response, single-team on-call scheduling, 1 status page, essential incident automation

Labelled on_call_response. We read that on 2026-09-01 from https://incident.io/pricing, where it says: “On-call Alert routing and grouping”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled on_call_response. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “On-call calendar ICS export”. How we use this

Incident management — 5 users, 1 on-call schedule, 1 escalation policy, 100 intl phone/SMS notifications/month, 700+ integrations, API access

Labelled on_call_response. We read that on 2026-09-01 from https://www.pagerduty.com/pricing/, where it says: “Escalation policies connect services to individual users and/or schedules to ensure the right people are notified at the right time.”. How we use this

Uptime and status page monitoring — free plan: 3 monitors (uptime, keyword, heartbeat), 3-minute check interval, 2 team members, 1 status page, SSL monitoring, multi-location checks, email/Slack/Discord alerts

Labelled status_page. We read that on 2026-09-01 from https://onlineornot.com/pricing, where it says: “Status page included”. How we use this

Uptime Monitoring free for up to 100,000 events for unlimited projets and unlimited status pages. Best for unlimited usage needs.

Labelled status_page. We read that on 2026-09-01 from https://phare.io/, where it says: “customizable status page”. How we use this

Uptime and status page monitoring — free plan: 20 monitors (HTTP, port, ping, keyword), 5-minute check interval, 1 basic status page with real-time updates and subscriber notifications, 1 seat, 1 server monitoring agent, email and webhook alerts Note — 2026-04-21: Hyperping free plan limits restructured: monitor cap raised from 5 to 20 (HTTP, port, ping, keyword), but the check interval slowed from 3 minutes to 5 minutes. Free plan now also includes 1 seat and 1 server monitoring agent. Trade-off: 4x more endpoints can be monitored, at the cost of slower check granularity. Source ↗

Labelled status_page. We read that on 2026-09-01 from https://hyperping.com/pricing, where it says: “Pricing Status page on your domain.”. How we use this

Incident management platform — free Basic plan: up to 5 users, Slack or Microsoft Teams native incident response, single-team on-call scheduling, 1 status page, essential incident automation

Labelled status_page. We read that on 2026-09-01 from https://incident.io/pricing, where it says: “Status Pages”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled status_page. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “Quick status page updates”. How we use this

Uptime monitoring — 10 monitors (HTTP/heartbeat/API), 5-minute check interval, 3 regions, 3-month history, 3 status pages

Labelled status_page. We read that on 2026-09-01 from https://pulsetic.com/pricing/, where it says: “Status Pages”. How we use this

Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages.

Labelled status_page. We read that on 2026-09-01 from https://monitormonk.com, where it says: “display their status on beautiful status pages”. How we use this

Get 20 uptime monitors with 5-minute intervals and a customizable status page—even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. No credit card needed to get started. Best for unlimited usage needs.

Labelled status_page. We read that on 2026-09-01 from https://uptimeobserver.com, where it says: “Status Pages”. How we use this

Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. Pro plan is offered to open-source projects and non-profits free of charge.

Labelled status_page. We read that on 2026-09-01 from https://pingpong.one/, where it says: “Hosted status page A central place for all status updates.”. How we use this

Cron job and uptime monitoring — free Hacker plan: 5 monitors, 5-minute check frequency, email, Slack, and webhook alerts, 1 status page (50 subscribers), 12-month data retention, single user

Labelled status_page. We read that on 2026-09-01 from https://cronitor.io/pricing, where it says: “Status Pages”. How we use this

Free monitoring for five websites, 3-minute intervals, public statuspage.

Labelled status_page. We read that on 2026-09-01 from https://uptimetoolbox.com/, where it says: “Status Page Builder”. How we use this

Monitor website changes, free for up to 6 monitors with 60-minute interval checks.

Labelled page_change_watch. We read that on 2026-09-01 from https://pagecrawl.io/, where it says: “Get notified when any webpage changes.”. How we use this

monitor five pages, checks every 24 hours.

Labelled page_change_watch. We read that on 2026-09-01 from https://www.wachete.com, where it says: “Get told the moment it changes”. How we use this

Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention Best for unlimited usage needs.

Labelled metrics_backend. We read that on 2026-09-01 from https://newrelic.com/pricing, where it says: “Our straightforward pricing is based on just two core metrics—users and data ingest OR compute and data ingest—making it easy to understand what you’re paying for.”. How we use this

Free OSS (Apache 2.0). CNCF graduated time-series monitoring and alerting. Pull-based metrics collection, PromQL query language, multi-dimensional data model Best for open source projects.

Labelled metrics_backend. We read that on 2026-09-01 from https://prometheus.io/, where it says: “Instrument, collect, store, and query your metrics for alerting, dashboarding, and other use cases.”. How we use this

The Elastic Stack — Elasticsearch, Kibana, ingest and basic security — self-managed at no cost on the Free and Open tier under the Elastic License and SSPL, with community support. Platinum (existing customers only) and Enterprise are custom-priced and add machine learning, cross-cluster replication, searchable snapshots and 24/7 support. Elastic Cloud Serverless and Hosted are billed separately by usage or resources. Best for open source projects.

Labelled metrics_backend. We read that on 2026-09-01 from https://www.elastic.co/pricing/self-managed, where it says: “optimized storage of metrics”. How we use this

10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder

Labelled metrics_backend. We read that on 2026-09-01 from https://betterstack.com/pricing, where it says: “Embedded charts & metrics”. How we use this

Free tier with 10K metric series, 50 GB logs, 50 GB traces, 14-day retention, 3 users

Labelled metrics_backend. We read that on 2026-09-01 from https://grafana.com/pricing/, where it says: “Fully-managed, highly-scalable metrics service in Grafana Cloud with built-in features to optimize cost.”. How we use this

OpenTelemetry-native observability with logs, metrics and traces in one tool. The community edition is free to self-host. SigNoz Cloud starts at $49/month including $49 of usage credit, then $0.3/GB ingested for logs and traces (15-day retention) and $0.1 per million metric samples; eligible startups pay $19/month for the first 12 months. Best for startups.

Labelled metrics_backend. We read that on 2026-09-01 from https://signoz.io/pricing/, where it says: “Metrics Explorer - search, query, and analyze all metrics”. How we use this

Observability platform — 500 GB ingest/month, 25 GB storage, 30-day retention, 2 datasets, 1 user, 10 GB-hrs/mo query compute, 256 fields/dataset, 3 monitors, Email/Discord notifiers only

Labelled metrics_backend. We read that on 2026-09-01 from https://axiom.co/pricing, where it says: “Metrics skill”. How we use this

Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub!

Labelled metrics_backend. We read that on 2026-09-01 from https://www.netdata.cloud/, where it says: “Centralized metrics streaming and storage”. How we use this

Always Free: all non-chargeable Google Cloud metrics, first 1M monitoring API calls/month. Dashboards, alerting, and uptime checks for GCP resources

Labelled metrics_backend. We read that on 2026-09-01 from https://cloud.google.com/monitoring/pricing, where it says: “Read API calls: $0.50/million time series returned”. How we use this

Economize helps demystify cloud infrastructure costs by organizing cloud resources to optimize and report the same. Free for up to $100,000 spent on cloud (AWS, Azure, GCP) every month.

Free load testing tools with limitations

Superseded: As of 2026-08-28, linkok.com reads: Free forever for small sites (up to 100 pages) with monthly scans and email reports. Paid tiers available for weekly and daily scans, ranging from $4/month to $400/month depending on the number of pages scanned. We are not publishing our stored linkok.com terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier now has different features and options. While a free tier for up to 100 pages still exists, it now offers monthly scans with email reports, while previously it was described as 'completely free' for small websites and open-source projects. There are also paid tiers for weekly and daily scans. Source ↗

Check if a website is blocked in China by the Great Firewall. It identifies DNS pollution by comparing DNS results and ASN information detected by servers in China versus servers in the United States.

Powerful Kubernetes monitoring based on Prometheus. Bring your own Prometheus or install the all-in-one bundle. The free tier includes up to 20 Kubernetes nodes. Alerts via Slack, Microsoft Teams, Discord, and more. Integrations with PagerDuty, OpsGenie, VictorOps, DataDog, and many other tools.

Find Core Web Vitals history for a url or a website.