Vigilmon vs Rigor is a comparison that comes up when teams outgrow basic uptime checkers and start asking whether they need synthetic performance testing. Rigor — now part of Splunk Observability Cloud — is a front-end performance optimization platform. Vigilmon is developer-focused external uptime monitoring. They solve different problems, and understanding which problem you actually have will save you both time and money.
What Is Rigor?
Rigor was an independent synthetic performance testing and optimization platform before Splunk acquired it and integrated it into Splunk Observability Cloud. Rigor's primary capability is running Lighthouse-based synthetic audits against web pages to identify front-end performance issues — render-blocking resources, oversized images, inefficient JavaScript bundles, Core Web Vitals regressions — and provide actionable recommendations for fixing them.
As part of Splunk Observability, Rigor now sits alongside Splunk's APM, infrastructure monitoring, and real user monitoring tools. It's positioned for front-end performance engineers, web performance teams, and organizations that need to track Lighthouse scores and Core Web Vitals across their web properties over time.
Rigor's synthetic checks can simulate browser sessions, waterfall network requests, and run continuous performance audits on a schedule. It integrates into CI/CD pipelines to catch performance regressions before they reach production.
What Is Vigilmon?
Vigilmon is a developer-first external uptime monitor built around one core principle: multi-region consensus before alerting. Every check runs from multiple geographically distributed probe nodes. An alert fires only when N independent nodes confirm that a service is unreachable — eliminating false positives from single-probe network anomalies.
Vigilmon monitors HTTP/HTTPS endpoints, TCP ports, and cron job heartbeats. It ships with response time history, color-coded latency bands, embeddable status badges, webhook notifications, and a REST API. The free tier covers up to 5 monitors with no credit card required.
Where Rigor optimizes front-end performance and tracks Lighthouse scores, Vigilmon answers: is your service reachable, and how fast is it responding?
Feature Comparison
| Feature | Rigor (Splunk) | Vigilmon | |---|---|---| | HTTP/HTTPS uptime monitoring | ✅ (basic) | ✅ (core feature) | | TCP port monitoring | ❌ | ✅ (free tier) | | Cron job / heartbeat monitoring | ❌ | ✅ | | Multi-region consensus alerting | ❌ | ✅ | | Lighthouse performance audits | ✅ (core feature) | ❌ | | Core Web Vitals tracking | ✅ | ❌ | | Synthetic browser sessions | ✅ | ❌ | | Waterfall network analysis | ✅ | ❌ | | CI/CD performance regression detection | ✅ | ❌ | | Response time history | ✅ | ✅ | | Webhook / Slack alerts | ✅ | ✅ | | Email notifications | ✅ | ✅ | | REST API | ✅ | ✅ | | Embeddable status badge | ❌ | ✅ | | Status pages | ✅ | ✅ | | Splunk ecosystem integration | ✅ (native) | ❌ | | Free tier | ❌ | ✅ permanent | | Self-service signup | ❌ (Splunk contract) | ✅ | | False-alert protection | ❌ | ✅ (consensus) |
Pricing Comparison
Rigor / Splunk Observability Pricing
Rigor is priced as part of Splunk Observability Cloud, which is an enterprise contract product. Splunk does not publish self-service pricing for Rigor's synthetic capabilities — pricing is negotiated based on usage, data volumes, and organizational scale. Splunk Observability contracts for teams with meaningful usage typically start in the thousands of dollars per month range.
This pricing is appropriate for enterprise web performance teams running dozens of pages across multiple environments with CI/CD integration and Splunk's broader observability stack. It is completely unsuitable for a developer who needs to know when their API endpoint goes down.
Vigilmon Pricing
Vigilmon's free tier is permanent and functional:
- Up to 5 monitors (HTTP, TCP, heartbeats)
- 5-minute check intervals
- Email + webhook alerts
- Multi-region consensus on every check
- Response time history with color-coded bands
- Embeddable status badge
Paid plans add monitors, 1-minute intervals, and team seats — at pricing accessible to small engineering teams. No contract. No Splunk enterprise agreement. Sign up, add a monitor, and alerts are configured in minutes.
What Rigor Is Actually For
Rigor's differentiated capability is Lighthouse-driven synthetic optimization. It runs continuous automated performance audits against web pages, tracks Core Web Vitals (LCP, FID, CLS) over time, and surfaces specific recommendations — defer this JavaScript, compress that image, eliminate this render-blocking CSS. Front-end performance teams use it to catch regressions before they affect SEO rankings or user experience metrics.
That's genuinely valuable work. Google's ranking algorithms weight Core Web Vitals; a regression in Largest Contentful Paint from a new marketing banner can cost search traffic. Rigor-style continuous Lighthouse auditing catches those regressions automatically.
But this is performance optimization tooling, not uptime monitoring. Rigor is asking "how fast and complete is this page rendering?" — a front-end performance question. Vigilmon is asking "is this service up or down?" — an availability question. These are related but distinct problems requiring different tools.
Alert Quality: The Core Monitoring Difference
Rigor: Performance Thresholds
Rigor's alerts trigger on performance threshold breaches — if a Lighthouse performance score drops below 80, or if LCP exceeds 4 seconds, an alert fires. This is the right model for performance regression detection. But availability alerting is not Rigor's primary use case.
Vigilmon: Multi-Region Consensus Uptime Alerting
Vigilmon's alerts fire on confirmed outages. Multiple independent probe nodes must agree that a service is unreachable before any notification goes out. This means:
- No false positives from single-probe network glitches
- High-confidence alerts — when Vigilmon pages you, something is actually broken
- Minimal alert fatigue — every notification represents a real incident affecting real users
For on-call engineers and developers who need to respond to every alert, signal quality matters more than feature richness. Vigilmon's consensus model delivers that.
When to Choose Rigor / Splunk Observability
Rigor is the right choice when you:
- Have a front-end performance engineering team tracking Core Web Vitals and Lighthouse scores across a marketing or e-commerce site
- Need CI/CD performance gates — block deploys when Lighthouse scores regress below a defined threshold
- Are already in the Splunk Observability ecosystem — APM, infrastructure monitoring, and synthetic testing in one platform
- Need waterfall analysis of page load timing to diagnose slow renders at the resource level
- Operate at enterprise scale with dedicated web performance programs and procurement budgets
When to Choose Vigilmon
Vigilmon is the right choice when you:
- Need reliable uptime alerting with zero false positives for your APIs, services, and cron jobs
- Monitor TCP services and backend processes — not just web pages
- Are a developer or small team with no dedicated front-end performance budget
- Want monitoring setup in minutes — no Splunk contract, no sales call, no integration work
- Care about on-call alert quality — every page represents a confirmed outage
- Need permanent free monitoring — the free tier is functional, not a trial
The Real Question
Before comparing Vigilmon and Rigor, be clear about which problem you're solving:
"Are my services up and responding?" — Vigilmon. HTTP uptime checks, TCP monitoring, cron heartbeats, and consensus alerting with no false positives.
"Are my web pages rendering fast enough and passing Lighthouse audits?" — Rigor/Splunk. Synthetic browser sessions, Core Web Vitals tracking, performance regression detection.
Many engineering teams need both — but at different price points and for different team members. The dangerous trap is using Rigor as an uptime monitor (expensive, over-engineered for the task) or using Vigilmon as a performance testing platform (not what it does).
Migration: Evaluating Vigilmon as Your Uptime Monitor
If you're currently paying for a monitoring suite that includes synthetic capabilities you don't use — and you just need reliable uptime alerting:
- Sign up at vigilmon.online — no credit card required
- Add your HTTP endpoints, TCP services, and heartbeat monitors
- Configure webhook alerts to Slack, PagerDuty, or email
- Run in parallel with your existing setup for a week
- Compare alert volumes — Vigilmon's consensus filtering will be noticeably quieter and more accurate
Conclusion
Vigilmon vs Rigor is not a feature-for-feature comparison — it's a use-case comparison. Rigor is a front-end performance testing and Lighthouse optimization platform embedded in Splunk's enterprise observability stack. Vigilmon is developer-focused uptime monitoring with multi-region consensus alerting.
If you're a front-end performance engineer running Lighthouse audits and tracking Core Web Vitals on a large-scale website — Rigor delivers capabilities that Vigilmon doesn't attempt. If you're a developer who needs to know when your service goes down, get paged within minutes, and never get a false positive — Vigilmon is built for exactly that.
Start monitoring free at vigilmon.online.
Tags: #monitoring #devops #webperf #uptime #splunk #rigor #lighthouse