Your site just went down at 3am. Your phone rings anyway
Hey Product Hunt 👋
I've shipped a lot of side projects. And every single one has taught me the same lesson the hard way: you never find out your site is down until a customer tells you.
Uptime email at 3:14am? Buried under 40 newsletters by the time I wake up. Slack ping? Muted, because I mute Slack so I can sleep. Meanwhile the checkout page has been throwing 500s for six hours and the first I hear of it is an angry DM.
So we built Defenso Alerts — a website monitor that lives on your phone and refuses to be ignored.
### What makes it different
The killer feature is the call-style "Alarm". When something critical happens — your site goes DOWN, gets hit with an attack, a TLS cert is about to expire — Defenso Alerts rings your phone like an incoming call. It punches straight through silent mode and Do Not Disturb, and it keeps ringing until you acknowledge it. No more sleeping through outages you'd have paid real money to know about.
And because not everything deserves a 3am alarm, it's per-site, per-event. For each site you pick: Off / Notification / Alarm — separately for "down", "recovered", "under attack", "cert expiring", "vulnerability found". Your marketing splash page? Silent. Your production API? Full alarm.
The other thing: Defenso Alerts isn't a standalone uptime toy. It's the phone screen for the whole Defenso security layer — managed WAF, DDoS mitigation, bot detection, upload scanning, honeypots, pentest + secret scans. So "under attack" isn't a guess. It's your WAF actually blocking things, pushed to your pocket in real time.
### The feature list
Alarm notifications that ring through silent / DND until acknowledged
Instant push on down / recovered / under attack
Domain + TLS certificate expiry warnings before they bite you
Vulnerability alerts straight from your pentest & scans
Per-site control: Off / Notification / Alarm per event type
Also fans out to Slack, Discord, Telegram, email, and webhook
Wired into your full Defenso WAF + monitoring stack
### It's free to start
Defenso's Free plan is $0 — 1 site, managed WAF, 1 uptime monitor, and the MCP server for AI coding tools. That's enough to put a real monitor on your main project and get alarmed the moment it breaks. Pro is $29/mo and Business $69/mo per site when you outgrow it (yearly −25%, and yes, AppSumo LTDs are honored).
Get it
Google Play (live now): https://play.google.com/store/apps/details?id=so.defen.alerts
iOS coming soon.
More on the monitor: https://defen.so/website-monitor-app
The full layer: https://defen.so
Would genuinely love your feedback — especially from anyone who's ever slept through an outage. What event should wake you up, and what shouldn't? Drop it below 👇
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