Every monitoring tool has a free tier now. UptimeRobot, Better Stack, Checkly, Grafana Cloud — scroll to any pricing page and you'll find a $0 option. The pitch is always the same: get started for free, upgrade when you're ready. What they don't tell you on the pricing page is what "free" actually costs you in practice — the check intervals that miss five-minute outages, the data retention that vanishes before your next sprint retrospective, the commercial-use clause buried in paragraph 14 of the Terms of Service that technically makes your startup's production monitoring a ToS violation.

We tested seven free monitoring tools in June 2026 and documented exactly what each one gives you at $0/month, what's locked behind paid plans, and the non-obvious catches that most comparison articles skip. If you're bootstrapping a project, running a side business, or just evaluating tools before committing budget, this is what you need to know.

TL;DR comparison

What "free" really means in monitoring

The word "free" in SaaS monitoring covers three fundamentally different things, and conflating them leads to bad decisions. First, there are genuinely free tiers designed to let small teams run production workloads without paying — these tools make money by converting growing teams to paid plans and don't restrict commercial use. Second, there are freemium tiers that exist primarily as lead generation — they give you just enough to experience the product but not enough to rely on, with aggressive upgrade prompts and feature gates designed to create friction. Third, there are open-source tools that cost $0 for the software but require you to provide and maintain the infrastructure.

The most important distinction most comparison articles miss entirely is commercial use rights. If you're using a free monitoring tool for a business — even a one-person SaaS, a freelance client project, or an internal company tool — you need explicit permission to use it commercially. Not every free tier grants this, and the one that most people assume does, doesn't anymore.

Full feature comparison

DevHelm Free — Best free tier for commercial use with status page included

DevHelm is a developer-first monitoring platform built around the idea that monitoring configuration belongs in version control, not in a web UI you click through once and forget. The free tier is designed to be a real production monitoring setup, not a trial — you get 50 monitors, a status page with custom domain support, and full access to the CLI, SDKs, Terraform provider, and MCP server.

What stands out about the DevHelm free tier compared to competitors is the combination of monitor count, status page inclusion, and tooling access. Most free tiers gate either the status page (Checkly, Grafana Cloud), the custom domain (Instatus, UptimeRobot), or the developer tooling (most of them). DevHelm gives you all three. The status page auto-updates from your monitor data, so when a check fails at 3 AM, your status page reflects it without anyone logging in to flip a toggle.

What you actually get for free:

• 50 monitors across HTTP, TCP, DNS, keyword, and SSL check types
• 5-minute check intervals from 2 regions
• 1 public status page with custom domain (e.g., status.yourapp.com)
• Email alerts with customizable notification policies
• Dependency tracking for up to 10 services
• 3 resource groups for organizing monitors
• Full CLI, Python SDK, JS SDK, Terraform provider, and MCP server access
• Commercial use explicitly permitted

What's gated behind paid plans:

• Check intervals faster than 5 minutes (30-second intervals on Pro)
• More than 2 check regions (8 on Starter, 20+ on Pro)
• Phone/SMS alerts
• More than 1 status page
• Longer data retention (90 days on Starter, 2 years on Pro)
• Multiple team members
• Incident management with on-call scheduling
• SSO/SAML authentication

The catch:

The 24-hour data retention on the free tier is the real constraint. You can see what's happening right now, but you can't look back at last week's uptime trends or pull a monthly reliability report for a client. If your workflow involves reviewing uptime data in retrospectives or sharing monthly SLA reports, you'll need at least the Starter tier. DevHelm is upfront about this limitation — it's listed on the pricing page, not buried in fine print — but it's worth understanding before you set up 50 monitors and wonder where your history went.

When to upgrade:

When you need historical uptime data beyond 24 hours, faster check intervals, or more check regions. The Starter tier at $12/month unlocks 90-day retention and 1-minute intervals, which covers most small-to-mid production setups.

UptimeRobot Free — Most monitors for free (but personal use only since Oct 2024)

UptimeRobot is the monitoring tool most developers try first. It's been around since 2010, it has name recognition, and for years it offered one of the most generous free tiers in the industry: 50 monitors, 5-minute intervals, and enough features to run basic production monitoring without paying a cent. That changed in October 2024.

UptimeRobot updated its Terms of Service in October 2024 to restrict the free plan to personal and non-commercial use only. This is the single most important fact about UptimeRobot's free tier that most comparison articles either don't know about or gloss over. If you're using UptimeRobot Free to monitor a SaaS product, a client's website, a company's internal tools, or any revenue-generating service, you are technically violating the Terms of Service. UptimeRobot hasn't publicly announced mass enforcement, but the legal exposure is real and the restriction is clearly stated in the current ToS.

The second change that matters: new accounts created after mid-2024 may be capped at 10 monitors on the free plan instead of 50. Existing accounts appear to be grandfathered at 50, but if you're signing up fresh today, check your actual dashboard limit rather than trusting what comparison articles (including older versions of this one) claim.

What you actually get for free:

• 50 monitors (grandfathered accounts) or 10 monitors (new accounts) across HTTP, ping, port, keyword, DNS, and SSL check types
• 5-minute check intervals
• Up to 5 alert integrations (email, webhook, Slack, etc.)
• 1 basic status page on a UptimeRobot subdomain (no custom domain)
• 3-month data retention
• Dashboard with uptime percentages and response time graphs

What's gated behind paid plans:

• Commercial use rights (requires Pro at $7/monitor/month)
• Custom domain for status pages (Pro only)
• Check intervals faster than 5 minutes (1-minute on Pro)
• More than 5 alert integrations
• Advanced notifications (SMS, phone calls)
• Maintenance windows
• Team member access
• API access beyond basic read operations

The catch:

Beyond the commercial-use restriction, UptimeRobot Free's per-monitor pricing on the paid tier is a steeper jump than it appears. If you're running 50 monitors and want to go commercial-legal, Pro costs $7/monitor/month — that's $350/month for the same 50 monitors you had for free. Many teams discover this math only after they've built their monitoring setup around UptimeRobot and face a significant bill or a migration project. The free tier is excellent for personal projects and hobby sites, but building your company's monitoring on it creates a dependency on a plan that explicitly doesn't support your use case.

When to upgrade:

If you're monitoring anything commercial — which includes client work, your startup, or your employer's services — you need to either upgrade to Pro or migrate to a tool that permits commercial use on its free tier. For genuinely personal projects (your blog, your homelab, your side project with no revenue), UptimeRobot Free remains one of the better options thanks to its 3-month data retention and straightforward interface.

Checkly Hobby — Best free tier for monitoring-as-code and browser checks

Checkly takes a different approach to monitoring than most tools on this list. Instead of configuring checks through a web dashboard, Checkly is built around monitoring-as-code — you write your checks as JavaScript or TypeScript files, store them in version control, and deploy them via CLI. The Hobby tier is the free plan, and it's focused on giving developers a taste of this workflow rather than providing maximum monitor count.

What makes Checkly's free tier unique is browser check support. You get 1,000 Playwright-based browser check runs per month, which means you can write end-to-end monitoring scripts that navigate your app like a real user — filling in forms, clicking buttons, and verifying that multi-step workflows actually work. No other free tier on this list offers browser-level synthetic monitoring.

What you actually get for free:

• 10 uptime monitors (HTTP/API checks)
• 10,000 API check runs per month
• 1,000 browser check runs per month (Playwright-based)
• 5-minute check frequency
• 6 global check locations
• Email and Slack alerts
• Checkly CLI for monitoring-as-code workflows
• 30-day data retention
• 1 user

What's gated behind paid plans:

• Status pages (not available on any Checkly plan — use a separate tool)
• More than 10 uptime monitors
• Check intervals faster than 5 minutes
• More than 6 check locations
• Phone/SMS alerts
• Team collaboration
• Private dashboards
• Multistep API checks beyond the free run cap

The catch:

Checkly doesn't offer status pages at all — not on the free tier, not on paid plans. If you need a public-facing status page (and most production services do), you'll need a second tool. That means running Checkly for monitoring and something like Instatus or DevHelm for your status page, which adds complexity and cost. The 1,000 browser check run cap also goes faster than you'd expect: if you have 3 browser checks running every 10 minutes, you'll burn through 1,000 runs in about 2.3 days. Budget your browser checks carefully or reserve them for critical user-facing flows only.

When to upgrade:

When you need more than 10 uptime monitors or your browser check runs exceed 1,000/month. The Team plan starts at $30/month with significantly higher run caps. If you're primarily doing API monitoring and don't need browser checks, other tools on this list offer more monitors for free.

Better Stack Free — Best free tier for all-in-one (monitoring + status page + logs)

Better Stack (formerly known as Better Uptime) bundles uptime monitoring, status pages, on-call scheduling, and log management into a single platform. The free tier gives you a taste of each: 10 monitors, 1 status page, and 3 GB of log ingestion per month. For teams that want monitoring, incident management, and observability under one roof without paying for three separate tools, Better Stack's free tier covers the widest surface area.

The 3-minute check intervals on the free tier are the fastest of any hosted free plan on this list (only Instatus at 2 minutes beats it among the SaaS options). Combined with the included status page and log ingestion, Better Stack Free is genuinely useful for small production deployments — the kind where you have a handful of services and want basic observability without configuring separate monitoring, logging, and status page tools.

What you actually get for free:

• 10 monitors (HTTP, TCP, DNS, SSL, cron/heartbeat)
• 3-minute check intervals
• 10 heartbeat monitors for cron jobs and background workers
• 1 public status page
• 3 GB log ingestion per month
• Email alerts
• Incident timeline and postmortem tools
• Basic on-call scheduling

What's gated behind paid plans:

• Phone and SMS alerts (Starter plan, ~$29/responder/month)
• More than 10 monitors
• Check intervals faster than 3 minutes (30-second on Starter)
• More than 1 status page
• Custom domain for status pages
• Log retention beyond 3 days
• Advanced on-call rotations and escalation policies
• Terraform provider access
• Team collaboration beyond 1 user
• White-label branding

The catch:

Email-only alerts on the free tier are the real limitation. When your primary database goes down at 3 AM, an email notification might not wake you up. The jump to phone/SMS alerts requires the Starter plan at approximately $29/responder/month, and "per responder" pricing means costs scale with your team size. A three-person on-call rotation puts you at ~$87/month before you've added extra monitors or log volume. The log retention on the free tier (3 days for the 3 GB allocation) is also short enough that debugging last week's intermittent issue often means the logs are already gone.

When to upgrade:

When you need phone/SMS alerts for on-call (which is most production workloads) or when 10 monitors aren't enough to cover your infrastructure. If you're primarily interested in log management, evaluate the log retention and volume caps carefully — 3 GB sounds generous until you realize a moderately busy API generates that in a few days.

Uptime Kuma — Best truly free option (self-hosted, unlimited everything)

Uptime Kuma is the outlier on this list. It's a self-hosted, open-source monitoring tool released under the MIT license, which means truly unlimited everything: monitors, check intervals, status pages, notification integrations, and data retention — all for $0 in software costs. The only expense is the server you run it on, typically a $5-15/month VPS.

Uptime Kuma runs as a single Docker container and takes about 60 seconds to deploy. The web UI is clean and functional, supporting over 20 monitor types (HTTP, TCP, DNS, ping, Docker container health, Steam Game Server, MQTT, gRPC, and more) and 95+ notification integrations (Slack, Telegram, Discord, PagerDuty, webhooks, email via SMTP, and dozens more). For a single-maintainer open-source project, the breadth of protocol support and integration coverage is remarkable.

What you actually get for free:

• Unlimited monitors across 20+ check types
• Configurable check intervals down to 20 seconds
• Unlimited status pages with full customization
• 95+ notification integrations out of the box
• Unlimited data retention (limited only by disk space)
• Multi-user support with role-based access
• Maintenance window scheduling
• Docker deployment in a single container
• MIT license — commercial use explicitly permitted

What's gated behind paid plans:

Nothing. There are no paid plans. Every feature is available to everyone.

The catch:

You are the operations team. When Uptime Kuma's SQLite database grows large enough to slow down queries, you fix it. When the Docker host needs a kernel security patch, you apply it. When Uptime Kuma releases a new version with a critical fix, you pull the image and restart the container. When the VPS provider has a network issue, your monitoring goes down right when you need it most — because your monitoring infrastructure is a single server with no redundancy.

The monitoring-monitors-itself problem is the fundamental limitation of self-hosted monitoring. If your monitoring server is in the same datacenter (or the same cloud provider) as the services it monitors, a regional outage takes down both your services and your ability to detect that they're down. Multi-region redundancy is theoretically possible (run Uptime Kuma in multiple locations) but practically means maintaining multiple instances with no built-in synchronization.

There's also no built-in subscriber notification system for status pages. Visitors can see the page, but there's no "subscribe for email updates" — you'd need to layer on a separate tool or a custom solution for that.

When to upgrade (or migrate):

When managing infrastructure isn't something you want to do, or when you need multi-region monitoring with checks running from geographically distributed locations. Self-hosted monitoring is a great choice for homelabs, internal tools, and teams with strong ops culture. It's a risky choice for customer-facing SaaS where monitoring availability directly affects your MTTR and incident response.

Instatus Free (Starter) — Best free status page with built-in monitoring

Instatus started as a status page tool and later added monitoring capabilities. The free Starter tier reflects that lineage: you get a polished public status page, 200 subscribers, 5 team members, and monitoring as a built-in feature rather than an afterthought. For teams whose primary need is a good-looking status page with basic monitoring attached, Instatus Free is a strong option.

The 2-minute check intervals on the free tier are the fastest of any hosted free plan on this list, which means Instatus will detect outages roughly 2.5x faster than tools checking every 5 minutes. The 15-monitor limit is reasonable for small services, and the 200-subscriber cap for status page notifications is generous compared to Atlassian Statuspage's 100-subscriber limit on their paid Hobby plan ($29/month).

What you actually get for free:

• 15 monitors (HTTP and keyword checks)
• 2-minute check intervals
• 200 status page subscribers
• 5 team members
• 2 on-call team members
• 1 public status page
• Email alerts
• Incident management with updates timeline
• Component grouping and maintenance windows

What's gated behind paid plans:

• Custom domain for status pages (Pro at $20/month)
• SMS alerts (Pro)
• More than 15 monitors
• More than 200 subscribers
• Custom CSS and branding options
• Private/password-protected status pages (~$50/month add-on)
• SSO/SAML (Business at $300/month)
• API access beyond basic operations

The catch:

No custom domain on the free tier means your status page lives at yourcompany.instatus.com instead of status.yourcompany.com. For internal tools and side projects, this is fine. For customer-facing SaaS, a subdomain branded to another company's product undermines the trust your status page is supposed to build. The monitoring check types are also limited to HTTP and keyword — if you need TCP, DNS, or SSL certificate monitoring, you'll need to look elsewhere or add a second tool. And while the 5-team-member allowance is generous, the 2 on-call member cap means only two people can receive escalated alerts, which doesn't support a proper rotation for most teams.

When to upgrade:

When you need a custom domain for your status page (most production SaaS will) or when 15 monitors aren't enough. The Pro plan at $20/month is straightforward flat-rate pricing with custom domain, SMS alerts, and higher limits — one of the more predictable upgrade paths on this list.

Grafana Cloud Free — Best free tier for metrics, logs, and dashboards

Grafana Cloud Free is less of a monitoring tool and more of an observability platform with monitoring capabilities bolted on. The free tier includes Prometheus metrics storage (10,000 series), log aggregation (50 GB), distributed tracing (50 GB), and unlimited dashboards — the full Grafana stack without the infrastructure management headache. Synthetic Monitoring (the part that does uptime checks) gives you 5 checks at 1-minute intervals.

If your mental model of "monitoring" is "I want to know when my website is down," Grafana Cloud Free will feel like bringing a fire truck to light a candle. But if you're already thinking in terms of metrics, logs, and traces — or if you're looking for a free Prometheus-compatible backend to receive metrics from your applications — the free tier is genuinely generous and the 14-day retention is long enough for most debugging workflows.

What you actually get for free:

• 10,000 active series for Prometheus metrics
• 50 GB logs (Loki)
• 50 GB traces (Tempo)
• 5 synthetic monitoring checks (HTTP, DNS, TCP, ICMP, multiHTTP)
• 1-minute check frequency for synthetic checks
• 25+ check locations globally
• Unlimited dashboards
• Alert rules (Grafana Alerting)
• 3 active users
• 14-day retention for metrics, logs, and traces
• Terraform provider for infrastructure-as-code

What's gated behind paid plans:

• Status pages (no built-in status page feature on any tier)
• More than 5 synthetic monitoring checks
• More than 10,000 metric series
• Longer data retention (13 months on Pro)
• More than 3 users
• Advanced alerting destinations (beyond email and Slack)
• SLO tracking and error tracking features
• Support beyond community forums

The catch:

Grafana Cloud is an observability platform, not a purpose-built uptime monitoring tool. The learning curve is steep: setting up your first synthetic check requires understanding the Grafana UI, probe locations, and check configuration that's more complex than "enter a URL and click save." The 5 synthetic checks on the free tier are genuinely limiting — most services have more than 5 endpoints worth monitoring. And the absence of status pages means you'll need yet another tool (DevHelm, Instatus, etc.) for incident communication.

The real value of Grafana Cloud Free is the metrics and logs storage, not the synthetic monitoring. If you need uptime checks, other tools on this list give you more for free. If you need a place to send your Prometheus metrics and application logs without running your own Grafana/Loki/Mimir stack, the free tier is hard to beat.

When to upgrade:

When you exceed 10,000 metric series or need more than 5 synthetic checks. The Pro plan uses consumption-based pricing, which can be hard to predict — monitor your usage closely to avoid surprise bills. For teams that only need uptime monitoring, a dedicated tool is almost always simpler and cheaper.

Decision framework: which free tier fits your situation?

The right free monitoring tool depends on three questions: what you're monitoring, whether it's commercial, and how much operational overhead you're willing to take on.

You're monitoring a commercial SaaS or client project:

Rule out UptimeRobot Free immediately — it's not licensed for commercial use. Your best options are DevHelm Free (50 monitors + status page + custom domain), Better Stack Free (10 monitors + status page + logs), or Instatus Free (15 monitors + status page with fast 2-minute intervals). If you need more than 15 monitors without paying, DevHelm is the only option at 50.

You need a public status page included:

DevHelm Free (custom domain included), Better Stack Free, Instatus Free (no custom domain), and Uptime Kuma all include status pages. Checkly and Grafana Cloud do not offer status pages at all. UptimeRobot includes one but only on a branded subdomain. If custom domain matters (it should, for customer-facing products), DevHelm Free is the only hosted option that includes it at $0.

You're a developer who wants monitoring-as-code:

Checkly Hobby is the strongest option for code-first monitoring workflows with Playwright-based browser checks. DevHelm Free also supports config-as-code via CLI, Terraform, SDKs, and an MCP server for AI-assisted setup. Grafana Cloud offers a Terraform provider. The rest are UI-first tools.

You want truly unlimited monitoring and don't mind self-hosting:

Uptime Kuma is the clear winner. Unlimited everything, MIT license, single Docker container. The trade-off is operational responsibility and single-region limitations.

You need the fastest possible free check intervals:

Uptime Kuma (20 seconds, self-hosted) > Instatus (2 minutes) > Better Stack (3 minutes) > DevHelm / UptimeRobot / Checkly (5 minutes). Faster intervals catch outages sooner, which directly impacts your mean time to recovery.

You need metrics, logs, and traces — not just uptime checks:

Grafana Cloud Free is in a different category from the rest. 10,000 Prometheus series and 50 GB of logs with 14-day retention is a legitimate observability backend. Better Stack Free also offers 3 GB of log ingestion. The others focus purely on uptime monitoring.

You're running a personal project or homelab:

UptimeRobot Free is still a solid choice for non-commercial monitoring — 50 monitors with 3-month retention and a simple interface. Uptime Kuma is even better if you enjoy self-hosting. For personal projects, the commercial-use restriction on UptimeRobot is irrelevant.

The bottom line

Free monitoring tiers are useful, but they're not equal. The gaps between them — commercial-use rights, data retention, check intervals, status page support, alerting channels — determine whether a free tier is a viable production tool or a trial that nudges you toward a paid plan.

The biggest change in the free monitoring landscape over the past two years is UptimeRobot's commercial-use restriction. If you're building on a free tier for a business, verify the Terms of Service before you invest time configuring 50 monitors. Migrating monitoring setups is tedious work that nobody wants to do under deadline pressure.

For commercial use with the most monitors and a status page, DevHelm Free gives you the broadest feature set at $0. For non-commercial projects, UptimeRobot Free remains hard to beat on retention and simplicity. For self-hosters who want zero limitations and zero recurring cost, Uptime Kuma is the obvious answer. For teams that need full-stack observability (metrics + logs + traces), Grafana Cloud Free is generous in ways that dedicated monitoring tools can't match.

Pick the tool that matches what you're actually building, verify the commercial-use terms, and plan your upgrade path before you need it — because the worst time to discover your free tier's limitations is during an incident at 3 AM.

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Originally published on DevHelm.