Compare 58 free monitoring tools, free tiers, and developer deals. We could not confirm today's terms for 26 of them: on 15 the page we cite did not answer, and on 11 our own read did not confirm them. Each row says why. Nothing on record contradicts our terms for Sentry, Datadog, BetterStack and more.
What this name holds: Uptime checks, metrics, tracing and the general-purpose observability suites — including Sentry and BetterStack, which also do the three names beside this one.
3 other names here answer “how do I find out it is broken”, and each holds a different list: Error Tracking (15), Logging (14), Status Pages (6).
We track 58 monitoring services with a free tier we hold as current and 1 without. This category has seen some movement — 14 pricing changes recorded across vendors.
| Vendor | Tier | Description | Read / catalogue date |
|---|---|---|---|
| Sentry | Developer | Developer tier: 1 user, 5K errors/month, 5M spans/month, 50 session replays, 5GB application logs, 1GB attachments | 2026-11-02 / 2026-08-11 |
| Datadog | Free | Infrastructure monitoring free for up to 5 hosts with 1-day metric retention | 2026-11-12 |
| Grafana Cloud | Free | Free tier includes access to all Grafana Cloud services with limited usage, 14-day retention, and community support. 10k metric series, 50 GB logs, and 50 GB traces are included. Pro costs $19 a month plus usage, includes 10k active series and 50 GB each of logs and traces, and bills usage above them. Pro keeps metrics for 13 months and logs, traces, profiles and k6 tests for 30 days.
|
2026-11-03 / 2026-08-14 |
| BetterStack | Free | 10 uptime monitors, 3 GB logs (3-day retention), 100K exceptions/mo, 5K session replays, 30 GB metrics, 1 status page, 1 responder | 2026-10-30 |
| Axiom | Personal | 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 onlyWhen we last read the page we cite for this offer, on 2026-11-12, we found the same terms as an earlier read we had declined to record, so we cannot confirm these terms today. | 2026-11-12 / 2026-10-22 |
| New Relic | Free | Full observability platform — 100 GB data ingest/month, 1 full platform user, unlimited basic users, 500 synthetic checks, 8+ days retention | 2026-10-24 |
| UptimeRobot | Free | Free $ 0 /month. 50 monitors, 5 min. monitoring interval, Dependency monitoring, HTTP, port & ping monitor, Keyword monitor, API monitoring, UDP monitoring, Location-specific monitoring, Slow response alerts, DNS monitoring, SSL & Domain exp. monitor, Only 5 integrations, Basic status pages | 2026-10-25 |
| Pulsetic | Free | Uptime monitoring — 10 monitors (HTTP/heartbeat/API), 5-minute check interval, 3 regions, 3-month history, 3 status pages | 2026-11-07 |
| Healthchecks.io | Free | 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) | 2026-11-07 |
| Prometheus | Free OSS | Free OSS (Apache 2.0). CNCF graduated time-series monitoring and alerting. Pull-based metrics collection, PromQL query language, multi-dimensional data modelThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-10, so we cannot confirm these terms today. | 2026-10-10 / 2026-08-22 |
| Jaeger | Free OSS | Free OSS (Apache 2.0). CNCF graduated distributed tracing system. End-to-end request tracing, performance optimization, root cause analysis. OpenTelemetry compatibleThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-10, so we cannot confirm these terms today. | 2026-10-10 / 2026-08-26 |
| StatusCake | Free | Uptime monitoring — 10 monitors, 5-min intervals, 1 page speed monitor, 1 domain monitor, 1 SSL monitor, email alerts, basic integrationsOur read on 2026-10-31 found the page different from the terms we hold, and we hold no confirmation of the terms we publish. | 2026-10-31 / 2026-08-13 |
| PagerDuty | Free | Incident management — 5 users, 1 on-call schedule, 1 escalation policy, 100 intl phone/SMS notifications/month, 700+ integrations, API access | 2026-11-08 / 2026-09-24 |
| Cronitor | Hacker | 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 userWhen we last read the page we cite for this offer, on 2026-11-01, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today. | 2026-11-01 / 2026-08-18 |
| Sematext | Basic (Free) | 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 plansOur read on 2026-10-28 found the page different from the terms we hold, and we hold no confirmation of the terms we publish. | 2026-10-28 / 2026-07-05 |
| Uptimia | Free | Website uptime monitoring. The free plan has one website and one API monitor, each checked as often as every 5 minutes; transaction, page-speed and real-user monitoring start with the paid plans. New accounts start on a 30-day trial with no credit card and move to the free plan unless they upgrade. | 2026-11-08 |
| OnlineOrNot | Free | 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 | 2026-10-24 / 2026-07-06 |
| Hyperping | Free | 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 alertsOur read on 2026-10-26 found the page different from the terms we hold, and we hold no confirmation of the terms we publish. | 2026-10-26 / 2026-07-07 |
| incident.io | Basic | 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 | 2026-11-11 |
| AppSignal | Free | Application monitoring (APM, errors, logging) — Our free plan is perfect for startups, hobby, or side-projects 30K requests 1GB logging 5-day retention | 2026-11-10 |
| Middleware.io | Free | Full-stack observability platform — free forever plan: 100 GB/month data (APM, logs, infrastructure, traces, RUM, synthetics, database, serverless), 1,000 RUM sessions/month, 20,000 synthetic checks/month, 14-day data retention, unlimited users | 2026-10-26 |
| 360 Monitoring | Lite | 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 | 2026-10-26 |
| StatusPile | Free | A status page of status pages. Could you track the status pages of your upstream providers?The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-26, so we cannot confirm these terms today. | 2026-10-26 / 2026-07-07 |
| assertible.com | Free | Automated API testing and monitoring. Free plans for teams and individuals. | 2026-11-04 |
| bleemeo.com | Free | Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules.When we last read the page we cite for this offer, on 2026-11-01, we found the same terms as an earlier read we had declined to record, so we cannot confirm these terms today. | 2026-11-01 / 2026-07-11 |
| Core Web Vitals History | Free | Find Core Web Vitals history for a url or a website.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-08 |
| deadmanssnitch.com | Free | Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign upThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-09 |
| downtimemonkey.com | Free | 60 uptime monitors, 5-minute interval. Email, Slack alerts.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-09 |
| economize.cloud | Free | 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. | 2026-11-04 / 2026-09-19 |
| fivenines.io | Trial | Linux server monitoring with real-time dashboards and alerting — no permanent free tier. 14-day free trial with no credit card required; paid plans from €19/month. | 2026-10-25 |
| incidenthub.cloud | Free | Cloud and SaaS status page aggregator — 5 monitors and 2 notification channels (Slack and Discord) are free forever.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-23, so we cannot confirm these terms today. | 2026-10-23 / 2026-07-12 |
| inspector.dev | Free | A complete Real-Time monitoring dashboard in less than one minute with a free forever tier.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-11 |
| linkok.com | Free | 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. | 2026-11-13 |
| loader.io | Free | Free load testing tools with limitations | 2026-11-04 |
| MonitorMonk | Free | 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. | 2026-11-10 |
| netdata.cloud | Free | Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub!When we last read the page we cite for this offer, on 2026-10-24, we could read no amount, tier or rate on the page, so we cannot confirm these terms today. | 2026-10-24 / 2026-07-08 |
| OntarioNet.ca CN Test | Free | 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.The page we cite for this offer names the platform it runs on and not the offer itself when we last looked, on 2026-10-21, so we cannot confirm these terms today. | 2026-10-21 / 2026-07-10 |
| pagecrawl.io | Free | The Free Forever plan allows tracking up to 6 pages with up to 220 checks and a frequency of up to 60 minutes. | 2026-10-25 |
| pagertree.com | Free | Simple interface for alerting and on-call management. Free up to 5 users.When we last read the page we cite for this offer, on 2026-10-29, we found the same terms as an earlier read we had declined to record, so we cannot confirm these terms today. | 2026-10-29 / 2026-07-12 |
| phare.io | Free | Superseded: As of 2026-08-28, phare.io reads: The Hobby plan is free forever, no credit card required. You get unlimited team members, unlimited projects, and all the core features. No artificial caps designed to pressure you into upgrading. We are not publishing our stored phare.io terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ | 2026-10-31 |
| pingbreak.com | Free | Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-12 |
| Pingmeter.com | Free | 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. | 2026-11-11 |
| pingpong.one | Free | 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.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-14 |
| robusta.dev | Free | 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.When we last read the page we cite for this offer, on 2026-11-13, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today. | 2026-11-13 / 2026-07-12 |
| Servervana | Free | Uptime monitoring with support for large projects and teams. Free tier: 10 HTTP monitors, 1 DNS monitor and 1 status page.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-15 |
| Simple Observability | Free | Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server. | 2026-11-08 |
| sitesure.net | Free | Website and cron monitoring - 2 monitors freeThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-10 |
| skylight.io | Free | Application performance monitoring — free for first 100,000 traces/month. | 2026-11-07 |
| statusgator.com | Free | Status page monitoring, 3 monitors freeThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-10 |
| SweetUptime | Free | Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 servers, 20 uptime monitors and 20 domain & SSL monitors for free, with 5 status pages and a 1-minute check interval. | 2026-10-31 |
| syagent.com | Free | Free server monitoring service with alerts and metrics. Up to 25 servers and 25 uptime monitoring instances. | 2026-11-04 |
| UptimeObserver.com | Free | 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.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-11, so we cannot confirm these terms today. | 2026-10-11 / 2026-07-11 |
| uptimetoolbox.com | Free | Basic $ 0 per month 5 Monitors 3 Minute Checks 1 Status Page 1 Server 7 Day Hi-Res Retention 3 Month Historical Data | 2026-10-29 |
| Wachete | Free | monitor five pages, checks every 24 hours. | 2026-11-08 / 2026-07-11 |
| Xitoring.com | Free | Superseded: As of 2026-08-28, xitoring.com reads: The page offers a 14-day free trial, and then paid plans starting at $4.99/mo for Uptime + SSL. We are not publishing our stored Xitoring.com terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ | 2026-10-29 / 2026-07-13 |
| Google Cloud Monitoring | Always Free | Always Free: all non-chargeable Google Cloud metrics, first 1M monitoring API calls/month. Dashboards, alerting, and uptime checks for GCP resources
|
2026-10-25 / 2026-08-18 |
| SigNoz | Free OSS | 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. | 2026-11-13 |
| Elastic | Free OSS | 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.The page we cite for Elastic states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page. | 2026-11-05 |
| Grafana | Free OSS | 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.The page we cite for Grafana states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page. | 2026-10-28 / 2026-08-27 |