OnlineOrNot

Uptime monitoring service for websites, APIs, cron jobs, and scheduled tasks. Detects downtime and sends alerts before customers notice, with support for status pages to keep stakeholders informed.

Trusted by software teams including Atlassian and Cisco. OnlineOrNot runs millions of checks weekly and stands out from alternatives by targeting freelancers, agencies, founders, and small teams rather than large enterprises. The product is customer-funded with no venture capital, ships daily based on feedback, and offers a well-documented experience. Compared to simple monitors, it handles configurable HTTP requests, multi-location checks, and SSL certificate monitoring.

Key features:

• Checks as often as every 30 seconds with configurable HTTP method, headers, and body
• Alerts via email, SMS, Slack, Discord, Microsoft Teams, PagerDuty, OpsGenie, Incident.io, Grafana OnCall, Spike, and webhooks
• Automatic status pages with subscriber updates and optional private pages for internal use
• Multi-location and geo-specific checks with optional double verification to reduce false positives
• Public API and open-source CLI for automation and terminal workflows
• SSL certificate expiration monitoring and alerts

Use cases include monitoring production websites before investor or customer demos, tracking API health for SaaS products, ensuring cron jobs and scheduled tasks run on time, and keeping customers informed through public status pages. Developers integrate the CLI or API into deployment pipelines and use webhooks for custom incident management.