Cassiefm

Simple, pay-as-you-go uptime monitoring for developers, with an amazing free tier

Easy Setup

Start uptime monitoring in minutes, unlimited monitors.

Amazing Free Tier

Monitor uptime every minute, even in the free tier.

Rich Notifications

Real-time SMS, email, and webhook notifications.

Pay-As-You-Go

Only pay for what you use. No subscriptions or overage fees.

Commercial Use

Uptime monitoring for your business is OK!

Status Pages

Public status pages and public status API.

Sign Up

No credit card required!

Amazing Free Tier

You can run one monitor every minute, or two monitors every two minutes, or three monitors every three minutes, or even 20 monitors every 20 minutes... And if you need more you can always buy more credits for as low as 0.000012 USD... Give it a go!