Your monitoring Slack channel goes quiet. Five minutes later you realize your checkout page has been returning 502s for the last quarter hour. Your users noticed before you did. That's not an incident management problem — it's a detection problem.
But once the alert fires, a different question kicks in: who answers it, on which channel, and what escalation path runs if they don't respond in time? That's where ilert comes in.
Understanding which half of the problem you're actually solving is the key to choosing — or combining — these tools.
What ilert Is
ilert is an on-call and incident management platform. Its job starts after an alert fires. It doesn't monitor your infrastructure — it handles what happens to the alert once it exists.
Core ilert capabilities:
- On-call schedules (rotation management, coverage gaps, time-zone handling)
- Escalation policies (primary → secondary → manager, with acknowledgement windows)
- Alert routing (direct alerts to the right team based on source or severity)
- Alert deduplication and grouping (prevent the same incident from spawning 40 pages)
- Uptime status pages (basic incident communication to stakeholders)
- Heartbeat monitoring (a simple dead-man's switch for cron jobs and batch processes)
- Integrations with monitoring tools like Datadog, Grafana, Prometheus, and Cloudwatch
ilert's value is the response layer. When your Grafana alert fires at 2am on a Tuesday, ilert ensures it reaches the right person — not the person who happens to see a Slack message first.
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 continuously, and sends alerts when something goes wrong.
The defining feature is multi-region consensus monitoring: Vigilmon requires a quorum of regional probes to agree before treating something as an outage. A single flaky probe or transient DNS hiccup in one geography won't wake your team. Only confirmed, multi-region failures generate alerts.
Vigilmon also includes a built-in customer-facing status page so your users know what's happening without flooding your support inbox during an incident.
Feature Comparison
| Feature | Vigilmon | ilert | |---|---|---| | HTTP/HTTPS endpoint monitoring | Yes | No (receives alerts, doesn't generate them) | | TCP port monitoring | Yes | No | | SSL certificate monitoring | Yes | No | | Multi-region consensus checks | Yes | No | | On-call scheduling | No | Yes | | Escalation policies | No | Yes | | Alert routing by team/severity | No | Yes | | Alert deduplication | No | Yes | | Heartbeat/dead-man monitoring | No | Yes | | Customer status page | Yes, included | Yes (basic) | | Slack / webhook alerting | Yes | Yes (as output) | | Self-hostable | Yes (open source) | No | | Free tier | Yes — 5 monitors, 1-min intervals | Yes — limited responder seats | | Paid pricing | ~$10–20/month | From $9/user/month | | Primary purpose | External detection | Alert routing and on-call response |
The Core Distinction: Detection vs. Response
Think of uptime monitoring and incident management as two stages in a single pipeline:
Stage 1 — Detection: Something checks whether your service is actually up, from outside your infrastructure, continuously. When it fails, it generates an alert.
Stage 2 — Response: Someone receives that alert, acknowledges it, and either fixes the issue or hands it off. When the alert isn't acknowledged, someone else gets paged.
Vigilmon owns Stage 1. ilert owns Stage 2.
The common mistake is buying Stage 2 tooling before Stage 1 is solved. ilert can't tell you your site is down — it can only route the alert once something else has detected the problem and sent ilert a signal. Without a monitoring tool as the upstream source, ilert has nothing to route.
Conversely, Vigilmon's alert delivery — Slack and webhooks — is adequate for small teams. But if you have an on-call rotation with multiple engineers, escalation tiers, and the expectation that someone picks up within 15 minutes at 3am, Vigilmon's alerting channel won't manage that coordination. That's what ilert does.
Pricing
ilert
ilert pricing is per-user, per-month:
| Plan | Price | Notable Features | |---|---|---| | Free | $0 | Up to 5 users, basic schedules, limited integrations | | Essentials | ~$9/user/month | Unlimited on-call schedules, escalations, voice calls | | Premium | ~$19/user/month | Alert grouping, reporting, SSO, priority support | | Enterprise | Custom | Advanced routing, dedicated support, custom SLAs |
For a 6-person on-call team on Essentials: ~$54/month. You still need to pay separately for a tool that actually monitors your services.
Vigilmon
| Tier | Cost | Monitors | Check Interval | |---|---|---|---| | Free | $0 | 5 managed / unlimited self-hosted | 1 minute | | Pro | ~$10–20/month | More monitors, shorter intervals | 30 seconds | | Self-hosted | ~$5/month VPS | Unlimited | Configurable |
For teams that need uptime monitoring with Slack alerts and a status page: Vigilmon's free tier covers it completely at $0/month.
When ilert Makes Sense
Choose ilert if:
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You have a real on-call rotation. If different engineers are on call on different days, and coverage gaps need to be managed explicitly, ilert's scheduling is purpose-built for that.
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Escalation tiers matter to you. When the primary on-call engineer must be escalated to a backup after N minutes without acknowledgement, ilert's escalation policies enforce that automatically.
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Multiple teams own different services. When a database alert should go to the DBA team and an API alert to the backend team, ilert's routing rules handle the sorting.
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You're measuring incident response metrics. If MTTD, MTTR, and on-call load reporting are tracked for engineering health or SLA compliance, ilert provides that data.
When Vigilmon Makes Sense
Choose Vigilmon if:
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You need to detect outages before your users do. Vigilmon's external probes check from the outside, where your users are. Internal monitoring can't catch what customers actually experience.
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False positives are burning you out. Multi-region consensus means a single geographic blip doesn't fire an alert. Your team only gets paged when multiple regions confirm the failure.
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You're a small team. For teams of 2–5, on-call scheduling complexity doesn't exist. Everyone's always effectively reachable. Vigilmon's Slack integration gets you 90% of the way there.
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You want a status page included. Vigilmon bundles the customer-facing status page at no extra cost. When your site goes down, your users see it before emailing support.
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Budget is a constraint. Vigilmon's free tier is genuinely useful — 5 monitors, 1-minute check intervals, status page, Slack alerts, no credit card required.
Using Both Together
Vigilmon and ilert aren't competitors — they solve adjacent problems. A mature stack combines them:
- Vigilmon monitors your endpoints from multiple regions. When a quorum of probes confirms an outage, it fires a webhook.
- ilert receives that webhook, routes it to the engineer on call tonight, and escalates if they don't acknowledge within your SLA window.
For teams at this stage — typically 10+ engineers with defined on-call responsibilities and SLA commitments — this pairing is cleaner than trying to stretch either tool beyond its purpose.
For teams not yet at that stage, Vigilmon alone covers the detection-and-alerting problem without the per-seat overhead.
Conclusion
ilert is a well-designed incident management platform. If you're running on-call rotations with escalation tiers, multi-team alert routing, and SLA tracking, it addresses real operational complexity that informal Slack channels can't handle.
But it doesn't detect outages — it routes them. You need Vigilmon (or something like it) upstream to generate the signal.
For teams who haven't yet reached the scale where on-call scheduling is a problem, Vigilmon's combined detection-plus-alerting approach is both sufficient and significantly cheaper. Start with detection. Add response tooling when your team size and operational complexity justify it.
Start monitoring for free at vigilmon.online — 5 monitors, 1-minute intervals, status page, Slack integration, no credit card required.
Tags: #monitoring #devops #ilert #uptime #oncall #incidentmanagement