If you've searched "SignalWire monitoring" and ended up comparing it to a tool like Vigilmon, you've likely hit a category mismatch. SignalWire is a cloud communications platform — it powers voice, video, and messaging apps. Vigilmon is an uptime monitoring platform — it watches whether your website, API, or server is up.
They're not competing for the same job. But the confusion happens often enough that it's worth explaining clearly what each tool does, when you'd use one vs. the other, and why many teams end up needing both.
What SignalWire Is
SignalWire is a programmable communications platform — a competitor to Twilio built by the team behind FreeSWITCH. Its core product, SignalWire Relay, lets developers build applications that send SMS messages, make and receive phone calls, run video calls, and set up real-time communications at scale.
SignalWire's features include:
- Voice and telephony APIs (PSTN, SIP)
- Programmable SMS and messaging
- Video conferencing APIs
- Real-time communications infrastructure (Relay SDK, SWML scripting)
- Call center and contact center tooling
What SignalWire does not include: uptime monitoring for your web application, HTTP endpoint checks, SSL certificate expiry alerts, or status pages. If you're using SignalWire to build communications into your app, you still need a separate tool to monitor whether your app itself is up.
What Vigilmon Is
Vigilmon is a purpose-built uptime monitoring platform. It continuously checks your HTTP/HTTPS endpoints, TCP ports, and SSL certificates from multiple geographic regions, then alerts you via Slack, email, or webhook when something goes wrong.
Its defining characteristic is multi-region consensus: Vigilmon won't fire a false alarm because a single probe in one region had a bad check. Multiple probes across different regions must agree that your endpoint is down before an alert fires. That distinction matters when you're getting paged at 3am.
Vigilmon also includes a built-in public status page so your customers see outage updates without flooding your support inbox.
Feature Comparison
| Feature | Vigilmon | SignalWire | |---|---|---| | HTTP/HTTPS endpoint monitoring | Yes | No | | TCP port monitoring | Yes | No | | SSL certificate monitoring | Yes | No | | Multi-region consensus checks | Yes | No | | Public status page | Yes, included | No | | Slack / webhook alerts | Yes | No (outbound) | | Voice API | No | Yes | | SMS / messaging API | No | Yes | | Video conferencing API | No | Yes | | Real-time communications SDK | No | Yes (Relay) | | Free tier | Yes — 5 monitors, 1-min intervals | Yes — usage-based credits | | Self-hostable | Yes (open source) | No | | Designed for | Web ops / developer uptime | Communications apps |
The Core Distinction: Monitoring vs. Communications
This is straightforward once stated plainly:
SignalWire helps you build communication features into your app — phone calls, video, SMS. It's a developer platform for programmable communications, not a monitoring tool.
Vigilmon tells you whether your app is working — whether your site loads, your API responds, your SSL certificate is valid, your server accepts connections. It's a monitoring tool for web operations, not a communications builder.
Teams building apps on SignalWire still need something watching whether their application is reachable. SignalWire won't tell you your server is down; it just won't be able to route calls when it is.
When You'd Need Both
The scenario where both tools appear in the same stack:
You're building a communications application — a customer support phone system, a click-to-call widget, a video consultation product — using SignalWire as the telephony layer. Your users make and receive calls through your app, which runs on your web infrastructure.
In that stack:
- SignalWire routes the calls, handles the media, manages the telephony
- Vigilmon watches whether your web app and API are actually up
If your server goes down, SignalWire can't help you — it has no visibility into your application's health. Vigilmon fires the alert, updates your status page, and notifies your team before customers start complaining that calls aren't connecting.
Pricing
SignalWire
SignalWire uses usage-based pricing — you pay per minute of voice, per SMS sent, per video participant-minute. It offers free trial credits to start. For a production communications workload, costs scale with usage volume, not a flat monthly seat fee.
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 covers small teams completely. If you're monitoring a handful of endpoints and need Slack alerts and a status page, you may never need to upgrade.
When to Choose Vigilmon
Choose Vigilmon if:
- You want to know immediately when your website, API, or server is down
- You're tired of false alarms from single-region probes that can't distinguish real outages from transient blips
- You want a public status page without paying for a separate StatusPage subscription
- You need SSL certificate expiry warnings before they become customer-visible outages
- Budget is a constraint — Vigilmon's free tier is genuinely useful, not a trial with a hard paywall
Add SignalWire if:
- You need to build voice, video, or messaging features into your application
- You're replacing Twilio infrastructure with something more cost-effective at scale
- You're building contact center, IVR, or real-time communications workflows
Conclusion
SignalWire and Vigilmon solve different problems in the same application stack. SignalWire is your communications layer; Vigilmon is your reliability layer. Teams building communications applications with SignalWire need to separately monitor whether their application infrastructure is actually healthy — and Vigilmon is built exactly for that job.
If your current need is simply "get notified when my site goes down, see when SSL certificates are expiring, and give customers a status page," Vigilmon covers that completely, starting free.
Start monitoring for free at vigilmon.online — 5 monitors, 1-minute intervals, multi-region consensus, status page, Slack integration, no credit card required.
Tags: #monitoring #uptime #signalwire #devops #webops