Comparing Vigilmon vs Raygun means comparing two tools that observe your application from completely different vantage points. Raygun is an inside-out platform combining crash reporting, real user monitoring (RUM), and application performance monitoring — all instrumented from within your code to capture exceptions, trace session journeys, and profile code-level performance. Vigilmon is an outside-in uptime monitoring service that checks from the same perspective your users have: is your service reachable, is the certificate valid, and did the cron job run?
Both tools can alert you to production problems. They almost never alert on the same problems. Understanding where each operates tells you whether you need one, the other, or both.
What Is Raygun?
Raygun is a developer-focused application intelligence platform. Its core products are:
- Crash Reporting — captures unhandled exceptions, stack traces, and affected user counts from web and mobile applications
- Real User Monitoring (RUM) — measures load times, page timing, JavaScript errors, and user session journeys directly from end-user browsers
- Application Performance Monitoring (APM) — traces slow transactions, database queries, and method-level execution to identify bottlenecks
Raygun integrates via SDK — a library your application loads, which instruments error handlers, injects page timing scripts, and wraps request handlers to capture performance data. It supports most mainstream languages and frameworks: JavaScript/Node, .NET, Ruby, Python, PHP, Java, Swift, and Objective-C.
The core value proposition is that when something goes wrong with your application's code, Raygun tells you exactly what broke, where in the code it broke, how many users encountered it, and how fast (or slow) your application was running at the time.
What Is Vigilmon?
Vigilmon is an agentless, outside-in uptime monitoring service. No library to install, no SDK to integrate, no code to instrument. Vigilmon checks whether your services are reachable from the outside — from the perspective of a user making a request from the open internet.
Every check is dispatched simultaneously from multiple geographically distributed probe nodes. An alert fires only when a majority of probes independently confirm the target is unreachable or degraded. This consensus model eliminates false positives from single-probe transient failures — packet loss, a DNS anomaly, a momentary routing issue — that would page your team if a single-probe tool saw them.
Vigilmon monitors:
- HTTP/HTTPS endpoints — status code validation, response body matching, SSL certificate expiry warnings
- TCP ports — raw socket checks for databases, mail servers, and custom services
- Cron job heartbeats — detect silent background job failures by waiting for pings that don't arrive
Features include response time history, embeddable status badges, a REST API, and webhook notifications for Slack, PagerDuty, OpsGenie, and custom endpoints.
Feature Comparison
| Feature | Raygun | Vigilmon | |---|---|---| | Crash / exception reporting | ✅ (core feature) | ❌ | | Stack trace capture | ✅ | ❌ | | Real user monitoring (RUM) | ✅ | ❌ | | Page load timing from browsers | ✅ | ❌ | | Application performance monitoring | ✅ | ❌ | | Session journey replay | ✅ | ❌ | | User-affected tracking | ✅ | ❌ | | HTTP/HTTPS uptime monitoring | ❌ | ✅ (consensus) | | TCP port monitoring | ❌ | ✅ | | Cron / heartbeat monitoring | ❌ | ✅ | | Multi-region consensus alerting | ❌ | ✅ | | SSL certificate monitoring | ❌ | ✅ | | Response time history (outside-in) | ❌ | ✅ | | Status page / badge | ❌ | ✅ | | Catches network-level failures | ❌ | ✅ | | Agentless (no SDK required) | ❌ | ✅ | | Webhook notifications | ✅ | ✅ | | Slack / PagerDuty / OpsGenie | ✅ | ✅ | | REST API | ✅ | ✅ | | Free tier | ✅ (14-day trial) | ✅ (5 monitors, permanent) |
Pricing Comparison
Raygun Pricing
Raygun prices by plan tier, with limits on error events ingested per month, number of applications, team seats, and data retention. The product line is split: Crash Reporting, RUM, and APM are separate features that can be purchased individually or bundled. As crash event volume or team size grows, costs scale accordingly.
There is no permanent free tier. Raygun offers a trial period that allows evaluation before committing to a paid subscription.
Vigilmon Pricing
Vigilmon's free tier is permanent and requires no credit card:
- Free: 5 monitors (HTTP, TCP, heartbeats), 5-minute check intervals, multi-region consensus alerting, email and webhook notifications, response time history
Paid plans scale with monitor count and check frequency. You pay for monitoring coverage — not for error event volume, not for user sessions, not for APM traces.
The Core Difference: Inside-Out vs Outside-In
Raygun: What Happens Inside Your Application and Browser
Raygun operates from within your application stack in two modes:
Server-side (Crash Reporting, APM): An SDK installed in your application intercepts unhandled exceptions and wraps transaction handlers. Every unhandled error generates an event that the SDK sends to Raygun's ingestion pipeline, tagged with stack trace, request context, user identity (if available), and timing data.
Client-side (RUM): A JavaScript snippet injected into your pages measures page load performance, captures JavaScript errors, and optionally records user session journeys directly from end-user browsers.
This inside-out model excels at one specific category: your application is running, requests are reaching it, but something is wrong in the code or the performance. The SDK is in the right place to see application-level failures because it's inside the processes and browsers where they occur.
What Raygun cannot see:
- Failures that prevent your application from starting
- DNS resolution failures that prevent users from finding your server
- SSL certificate errors that browsers reject before the request reaches your app
- Network-level failures between users and your infrastructure
- Load balancer or ingress failures that drop connections before reaching your code
- Regional routing failures that make your service unreachable from specific geographies
- Silent cron job failures — jobs that just stop running without throwing exceptions
These failures produce complete, user-visible outages. Raygun's SDK never sees them because the requests that cannot reach your application never generate exceptions the SDK can capture.
Vigilmon: What Users Experience
Vigilmon simulates what a user experiences when trying to reach your service. Its probes attempt the same HTTP request a browser would make — or the same TCP connection a database client would attempt — from multiple geographic locations simultaneously.
What Vigilmon catches that Raygun cannot:
- DNS failures (probes cannot resolve your domain)
- SSL certificate expiry (certificate rejected before the request reaches your app)
- Load balancer failures (connections dropped before reaching the SDK)
- Server crashes that prevent the application from accepting connections
- Regional routing failures (service unreachable from specific geographies)
- Silent cron job failures (job stops running without generating an exception)
What Vigilmon cannot see:
- Application exceptions that don't affect HTTP response codes
- JavaScript errors in user browsers
- Page load performance as users experience it
- Stack traces or the specific method where an error originated
- How many users were affected by an application-level bug
The Blind Spot Raygun's RUM Doesn't Fix
It's worth addressing a common assumption: doesn't Raygun's Real User Monitoring cover availability from the user's perspective?
RUM measures the experience of users who successfully load your page. If DNS resolution fails, the user never loads the page, and Raygun's RUM script never runs. If the load balancer is down, the page is not served, and the RUM measurement never happens. If the SSL certificate is expired, the browser blocks the connection before serving any JavaScript.
RUM is excellent at measuring what happens during a successful page load — but it is structurally blind to the failures that prevent the page from loading at all. Vigilmon's outside-in checks cover exactly those failures.
When to Use Both Together
Raygun and Vigilmon cover complementary failure modes. The most complete monitoring setup uses both:
- Raygun for application intelligence: crash reporting, stack traces, RUM performance data, session replay, APM tracing, and user-affected counts
- Vigilmon for external availability: outside-in HTTP checks, TCP port monitoring, SSL certificate monitoring, cron job heartbeats, multi-region consensus alerting
Combined coverage matrix:
| Failure Type | Caught By | |---|---| | Unhandled exception in application code | Raygun | | JavaScript error in user browser | Raygun (RUM) | | Slow page load performance | Raygun (RUM/APM) | | N+1 database query causing timeout | Raygun (APM) | | DNS failure preventing domain resolution | Vigilmon | | SSL certificate expired or expiring | Vigilmon | | Load balancer failure (connections dropped) | Vigilmon | | Server crash (application not accepting connections) | Vigilmon | | Regional routing failure | Vigilmon | | Silent cron job failure | Vigilmon (heartbeats) | | Cron job crashes with unhandled exception | Raygun + Vigilmon heartbeat |
Choosing a Starting Point
Choose Raygun first if:
- Your primary concern is application code quality — catching and debugging exceptions before they affect users
- You need Real User Monitoring to understand actual page load performance across your user base
- You need APM data to identify slow transactions or database bottlenecks
- You need to know exactly how many users encountered a specific bug, and which users
- Your team's biggest bottleneck is time-to-diagnose once an incident is underway
Choose Vigilmon first if:
- You need to know immediately when users cannot reach your service at all
- You run services that cannot be instrumented with an SDK (third-party APIs, CDNs, partner endpoints)
- You have background jobs or cron jobs with no existing failure visibility
- You want permanent free tier monitoring without a trial expiry or credit card
- False positive reduction is a priority — multi-region consensus before alerting
- You want outside-in availability checks across multiple geographies
Side-by-Side Summary
| Dimension | Raygun | Vigilmon | |---|---|---| | Primary purpose | Crash reporting, RUM, APM | Service availability monitoring | | Observes from | Inside app code + user browsers | Outside the infrastructure | | What it monitors | Exceptions, page timing, traces | HTTP, TCP, cron heartbeats | | Alert model | Exception-driven (event occurs) | Consensus (majority of probes agree) | | False positive protection | ❌ | ✅ (multi-region quorum) | | Catches network-level failures | ❌ | ✅ | | Catches application exceptions | ✅ | ❌ | | Catches silent job failures | ❌ | ✅ (heartbeats) | | RUM / browser performance | ✅ | ❌ | | Code change required | Yes (SDK + script) | No | | SSL monitoring | ❌ | ✅ | | Outside-in response time history | ❌ | ✅ | | Free tier | Trial only | ✅ (5 monitors, no expiry) |
Conclusion
Vigilmon vs Raygun is not a head-to-head competition between equivalent tools — it's two different instruments measuring different dimensions of system health. Raygun watches what happens inside your code and inside your users' browsers. Vigilmon watches what happens when someone tries to reach your service from the open internet, before any of your code has a chance to run.
Teams that need both should run both. Raygun's green dashboard — zero crashes, acceptable RUM scores — does not mean users can reach your service. Vigilmon's green dashboard does not mean your application is free of exceptions.
For teams choosing a first tool:
- If your biggest production risk is "bugs go undetected and affect users quietly," start with Raygun's crash reporting.
- If your biggest production risk is "the service goes down and nobody notices until users complain," start with Vigilmon.
Vigilmon's free tier — 5 monitors, no credit card, no trial expiry — means you can have outside-in consensus monitoring from day one without a purchasing conversation.
Try Vigilmon free at vigilmon.online — no credit card, no trial expiry, multi-region consensus alerting from the first monitor.
Tags: #monitoring #uptime #raygun #crashreporting #rum #vigilmon #devops #sre #2026