Vigilmon vs IsDown: Understanding the Difference Between Vendor Monitoring and Your Own Uptime

When evaluating uptime monitoring tools, Vigilmon and IsDown look like they occupy the same space — both tell you when something is down. But they answer fundamentally different questions. Understanding the distinction helps you build a monitoring strategy that catches every class of outage, not just one.

What Is IsDown?

IsDown is a status page aggregator. It monitors the official status pages of third-party SaaS vendors — Stripe, AWS, GitHub, Twilio, Cloudflare, Salesforce, and hundreds more — and sends you alerts when a vendor reports an incident.

The key point: IsDown doesn't probe anything. It reads the status pages that vendors publish themselves. When Stripe posts "we are investigating payment processing delays," IsDown detects that update and notifies you.

This is genuinely useful. Without IsDown (or a similar tool), your on-call team has to manually check a dozen vendor status pages when users report an issue, trying to determine whether the problem is yours or a dependency's. IsDown automates that awareness.

What Is Vigilmon?

Vigilmon is an active uptime monitoring platform. It sends real HTTP requests, TCP connection attempts, and SSL probes to your own endpoints — from multiple geographic locations — on a schedule. If your site, API, or service doesn't respond correctly, Vigilmon detects the failure and alerts you immediately.

Vigilmon answers a different question: is your own infrastructure up, from the outside world's perspective?

This includes:

• Your web application returning 200 on https://yourapp.com
• Your REST API responding to health checks at https://api.yourapp.com/health
• Your database port accepting connections
• Your background workers phoning in heartbeats on schedule
• Your SSL certificate expiring in the next 30 days

The Critical Difference

| Aspect | IsDown | Vigilmon | |---|---|---| | What it monitors | Third-party vendor status pages | Your own endpoints and services | | How it works | Reads vendor-published status updates | Active probes from external locations | | What triggers an alert | Vendor posts an incident update | Your endpoint fails a check | | False positives | Low (vendor confirmed the incident) | Low (multi-region consensus required) | | Lag from real incident to alert | Depends on vendor status page update timing | Seconds to minutes (check interval) | | Covers your own bugs | No | Yes | | Covers vendor outages | Yes | Only if vendor outage breaks your checks |

The fundamental gap in vendor status monitoring is lag. When AWS has a regional S3 issue, there is often a gap of 15–45 minutes between the incident starting and the AWS status page being updated. IsDown tells you what the vendor has officially acknowledged. Vigilmon tells you what your users are experiencing right now.

The flip side: Vigilmon can detect that your app is down without knowing why. If Stripe is processing payments normally but your payment service is misconfigured, Vigilmon catches the failure. IsDown, which only reads Stripe's status page, shows all-green.

Where Vendor Status Monitoring Falls Short

1. Vendor status pages lag behind reality. Major cloud providers are notorious for updating their status pages well after incidents start. During the lag window, IsDown shows "operational" while your users are experiencing failures.

2. Partial outages are often not reflected. A vendor might have an issue affecting 10% of customers in one availability zone but post nothing on their status page because the impact is "limited." Your app, if it happens to run in that AZ or region, is affected. IsDown won't catch it.

3. Your own bugs look identical to vendor outages from the user's perspective. If your Stripe integration breaks because of a code change you deployed, your users can't pay regardless. IsDown shows Stripe is fine. You need Vigilmon to detect that your own payment endpoint has stopped responding.

4. The vendor might be up but your integration is broken. Stripe could be fully operational while your webhook handler is failing to process events due to a schema mismatch in your database. IsDown is blind to this.

Where IsDown Excels

Vendor incident awareness is a real operational need. When your on-call engineer gets paged because user transactions are failing, knowing instantly whether it's a Stripe incident vs. your own code is high-value information. IsDown provides that context immediately.

For teams with critical dependencies on many SaaS services — payment processors, email providers, authentication services, data pipelines — monitoring dozens of vendor status pages manually is time-consuming and error-prone. IsDown solves this.

IsDown also helps with customer communication. If Salesforce has an incident and your CRM is unusable, you can post a proactive status update to your own users before they notice and contact support, referencing the upstream vendor issue.

Feature Comparison

| Feature | Vigilmon | IsDown | |---|---|---| | HTTP/HTTPS endpoint monitoring | Yes | No (your endpoints) | | TCP port monitoring | Yes | No | | Heartbeat monitoring | Yes | No | | SSL certificate monitoring | Yes | No | | SaaS vendor status tracking | Indirectly (endpoint-level) | Yes (200+ vendors) | | Multi-region probes | Yes | N/A | | Alert channels | Email, SMS, Slack, PagerDuty, webhooks | Email, Slack, PagerDuty, webhooks | | Status pages (your own) | Yes | Yes | | Check frequency | 30 seconds | Near real-time (event-driven) | | Free tier | Yes (5 monitors) | Yes (limited) | | API access | Full REST API | Yes |

Pricing

Vigilmon offers a free tier with 5 monitors and paid plans that scale with monitor count and check frequency. There are no per-alert charges and no hidden add-ons.

IsDown offers a free tier covering a handful of vendors and paid tiers based on the number of vendors monitored and team seats.

The two tools are priced for different use cases and are not direct substitutes — which reinforces why many teams run them together.

Use Cases Side by Side

E-Commerce Platform

What Vigilmon monitors: storefront availability, checkout API, payment endpoint response times, SSL certificate expiry, database port health, heartbeat from order processing workers.

What IsDown monitors: Stripe (payment processing), SendGrid (transactional email), AWS (hosting infrastructure), Cloudflare (CDN/DDoS protection), Shopify APIs (if applicable).

Together: you know immediately whether a checkout failure is your code, your infrastructure, or an upstream vendor.

B2B SaaS Company

What Vigilmon monitors: login endpoint, dashboard load, API health, background job heartbeats, webhook delivery endpoint.

What IsDown monitors: Auth0 or Okta (SSO), Salesforce (CRM integration), HubSpot (marketing), Twilio (communications), Zendesk (support).

Developer Tooling Startup

What Vigilmon monitors: CLI download endpoint, documentation site, API, CI/CD webhook receiver, npm registry integration health check.

What IsDown monitors: GitHub (source code hosting), npm (package registry), Vercel or Netlify (deployment), AWS S3 (artifact storage).

The Case for Running Both

The question "Vigilmon or IsDown" is a false choice. They solve different problems:

• Vigilmon tells you when your services are failing, from the outside perspective that your users have.
• IsDown tells you when your dependencies are officially reporting problems.

A mature incident response workflow uses both signals. When an alert fires:

1. Check Vigilmon — is my endpoint actually down? What's the error?
2. Check IsDown — is a dependency having an incident that could explain this?

This narrows the investigation surface in minutes rather than requiring engineers to check vendor dashboards manually under pressure.

Conclusion

IsDown and Vigilmon are complementary tools, not competitors. If you only have one, you have a blind spot. IsDown without Vigilmon means you know when AWS is struggling but you won't know when your own application is down. Vigilmon without IsDown means you'll detect that your app is broken but you may not quickly determine whether it's a vendor dependency causing it.

For teams serious about reliability, the right answer is both — and the combined cost is typically well under one hour of an engineer's time during a preventable outage.

Try Vigilmon free at vigilmon.online — 5 monitors, no credit card required, multi-region uptime monitoring from the first day.