There's a setup story that plays out often in growing engineering teams: you install the Grafana agent on your servers, wire up Prometheus scraping, configure alert rules, set up notification policies, and — two days later — you realize you still don't know if your site is actually reachable from your users' perspective.
Grafana Cloud is a powerful observability platform. But it observes your system from inside your stack. That's a fundamentally different job than external uptime monitoring, and conflating the two leads to gaps in your visibility — and to over-engineering a simple problem.
This article compares Vigilmon and Grafana Cloud's Synthetic Monitoring feature, explains when each is the right tool, and makes the case that for many teams, the right answer is both — doing different jobs.
What Grafana Cloud Is
Grafana Cloud is the hosted version of the open-source LGTM observability stack: Grafana (dashboards), Loki (logs), Tempo (distributed traces), and Mimir (metrics). It's a comprehensive managed SaaS for teams that want full-stack observability without running the infrastructure themselves.
Grafana Cloud also offers Synthetic Monitoring — a plugin that runs external checks (HTTP, TCP, DNS, ping, scripted k6 tests) from Grafana-managed probe locations. Results flow back into your Grafana dashboards alongside your application metrics.
The key phrase is alongside your other metrics. Grafana Synthetic Monitoring is designed to live inside the Grafana ecosystem. It's a complement to an existing observability stack, not a standalone uptime checker.
What Vigilmon Is
Vigilmon is a purpose-built external uptime monitoring platform. It watches your HTTP endpoints, TCP ports, and SSL certificates from multiple geographic regions — entirely outside your infrastructure — and alerts you when something fails.
Its defining feature is multi-region consensus: instead of a single probe location declaring your site down after one failed check, Vigilmon requires a quorum of probes from independent geographic regions to agree before firing an alert. This eliminates false positives from CDN route flaps, regional DNS glitches, and transient probe failures.
No agents to deploy. No metrics pipelines to configure. No dashboards to build before you get your first alert. Add a URL, connect Slack, and you're running in under two minutes.
The Key Distinction: Inside vs. Outside
This is the most important architectural difference between the two tools.
Grafana Cloud observes your system from inside: agents and exporters run in your infrastructure, shipping metrics, logs, and traces to Grafana's ingestion pipeline. It tells you what's happening inside your application — CPU usage, memory, query latency, error rates, database connection pool depth.
Vigilmon observes your system from outside: its probes are independent of your infrastructure, running from external networks in multiple regions. It tells you what your users experience — whether the site is reachable, whether HTTPS handshakes succeed, whether TCP ports accept connections.
These are complementary angles. An application can be healthy internally (Grafana sees no errors) while being unreachable externally (DNS misconfiguration, CDN certificate error, firewall rule change). An application can be partially degraded externally while internal metrics look fine (a regional routing failure that Grafana's agents — inside your VPC — never see).
Feature Comparison
| Feature | Vigilmon | Grafana Cloud Synthetics | |---|---|---| | Monitoring vantage point | External (independent probes) | External probes, but results live inside Grafana stack | | Multi-region consensus | Yes — quorum required | No — single probe per location | | HTTP/HTTPS monitoring | Yes | Yes | | TCP monitoring | Yes | Yes | | SSL certificate monitoring | Yes | Yes | | DNS monitoring | Yes | Yes | | Scripted multi-step checks | No | Yes (k6) | | Internal metrics / APM | No | Yes (full LGTM stack) | | Status page | Yes, included | No (separate product) | | Slack / webhook alerts | Yes | Yes (via Grafana Alerting) | | Free tier | Yes — 5 monitors, 1-min intervals | Yes — 10,000 execution credits/month | | Setup time | ~2 minutes | 30–90 minutes | | Requires existing Grafana setup | No | Strongly recommended | | Self-hostable | Yes (open source) | No | | Complementary to other tools | Yes | Yes |
Setup: The Real Cost of Grafana Synthetic Monitoring
Getting a useful alert out of Grafana Synthetic Monitoring requires several configuration steps:
- Create or log into a Grafana Cloud account
- Install the Synthetic Monitoring plugin
- Configure check locations and intervals in the plugin
- Create alert rules in Grafana Alerting (a separate configuration surface)
- Set up a contact point (Slack, email, PagerDuty) via notification policies
- Build or find a dashboard to surface the synthetic check data
For a team that already lives inside Grafana Cloud, steps 4–6 are already done. Adding synthetic checks is genuinely low-friction.
For a team that doesn't use Grafana for anything else, those steps compound into a significant investment before the first alert fires reliably. Grafana Alerting in particular has a steep learning curve — its PromQL-based alert conditions, routing trees, and notification policy inheritance model are powerful but non-trivial to configure correctly.
Vigilmon's setup is: enter a URL, enter a Slack webhook, click save. The status page is live. Alerts fire automatically on failure. No prior configuration required.
Pricing: What You Actually Pay
Grafana Cloud
Grafana Cloud's free tier includes 10,000 Synthetic Monitoring execution credits per month.
Running one HTTP check every minute = ~43,200 executions/month per monitor.
The free tier covers roughly 0.2 monitors at 1-minute frequency before you hit the execution limit.
Beyond the free tier, Synthetic Monitoring is billed at approximately $1 per 1,000 executions. Monitoring 5 endpoints at 1-minute intervals costs roughly $215/month in execution credits alone — before paying for any other Grafana Cloud resources like metrics ingestion, log storage, or user seats.
The Pro plan at $299/month bundles more resources across the full stack. If your team is already paying for Grafana Cloud for metrics and logs, Synthetic Monitoring becomes incrementally affordable. If you're only here for uptime checks, $299/month is expensive for what you're getting.
Vigilmon
| Tier | Cost | Monitors | Check Interval | |---|---|---|---| | Free | $0 | 5 managed / unlimited self-hosted | 1 minute | | Pro | ~$10–20/month | More monitors | 30 seconds | | Self-hosted | ~$5/month VPS | Unlimited | Configurable |
Vigilmon's free tier provides genuine 1-minute monitoring for 5 endpoints — significantly more effective coverage than Grafana Cloud's free execution credits.
The False-Positive Problem
Grafana Synthetic Monitoring follows the standard single-probe model: each check location evaluates independently. One location failing triggers an alert — even if the site is reachable everywhere else.
This is how most uptime monitors work, and it's why uptime alert fatigue is so common. A flaky probe in one region, a transient routing issue on one AS path, a brief DNS hiccup at one nameserver — these all fire alerts for sites that are actually up.
Vigilmon's multi-region consensus model requires multiple independent regional probes to agree on failure before alerting. False positives from single-point regional failures are eliminated by design.
For teams already managing alert noise inside Grafana Alerting — where noisy monitors get muted, muted monitors miss real incidents — Vigilmon's signal-to-noise ratio is a material improvement.
The Complementary Case
Here's an honest take: Vigilmon and Grafana Cloud aren't really competing for the same job. The more useful framing is use both.
Grafana Cloud monitors inside your stack:
- What are my service error rates right now?
- Which database query is causing the p95 latency spike?
- What do my container CPU graphs look like over the last 24 hours?
- How many log lines hit the ERROR level in the past hour?
Vigilmon monitors outside your stack:
- Is my site reachable from Sydney, Frankfurt, and São Paulo right now?
- Did my SSL certificate renew successfully?
- Is my API's TCP port accepting connections from external networks?
- What does my customer-facing status page show?
These angles are complementary, not redundant. Running both gives you a complete picture: deep internal observability from Grafana, and zero-config external uptime coverage from Vigilmon.
When to Choose Grafana Cloud Synthetics
Choose Grafana Synthetics if:
- You're already paying for Grafana Cloud. If you're using Grafana for metrics, logs, or traces, adding Synthetic Monitoring is incremental cost and keeps your observability in one place.
- You need scripted multi-step check flows. Grafana's k6-based scripted checks support multi-page user journeys, OAuth authentication flows, and complex API test sequences. Vigilmon doesn't do this.
- Your team owns Grafana configuration. If someone owns the alert routing model and dashboard setup, the investment is manageable.
When to Choose Vigilmon
Choose Vigilmon if:
- You don't use Grafana yet. The onboarding overhead for Grafana Cloud as an uptime-only tool doesn't make sense when Vigilmon starts in two minutes.
- You want fewer false alarms. Multi-region consensus is a structural improvement over single-probe models.
- You want a status page without extra setup. Grafana doesn't include a customer-facing status page — that's a separate product category. Vigilmon includes it.
- Budget is a constraint. Vigilmon's free tier covers what most small teams need, at $0/month and no credit card required.
- You want self-hostable open-source infrastructure. Vigilmon can run on any $5 VPS; Grafana Cloud is SaaS-only.
Conclusion
Grafana Cloud is an excellent observability platform for teams invested in the LGTM ecosystem. Its Synthetic Monitoring feature is a capable addition for those teams — but it's an internal observability add-on, not a standalone external uptime monitor, and the execution-based pricing makes it expensive if you're only here for uptime checks.
Vigilmon is purpose-built for external uptime monitoring: zero-config, multi-region, false-positive-resistant, with an included status page. It's not trying to replace Grafana — it's doing a job Grafana's architecture isn't designed to do well at low cost.
For most developer teams, the right answer is to run both: Grafana (or equivalent) for deep internal observability, and Vigilmon for the outside-in uptime view that your users actually experience. Start Vigilmon for free while you build out your observability stack — or keep it as the lean, reliable external layer alongside whatever internal tooling you run.
Start monitoring for free at vigilmon.online — 5 monitors, 1-minute intervals, status page, Slack integration, no credit card required.
Tags: #monitoring #devops #grafana #uptime #observability