OnlineOrNot monitors websites, APIs, cron jobs, and heartbeats, sending alerts through channels like Email, SMS, Slack, Telegram, and PagerDuty when problems are detected. It offers configurable HTTP checks, multi-region verification, SSL monitoring, real-browser (Playwright) checks, and public or private status pages. The product also provides a public API and an open-source CLI for scripting and integration into existing workflows.
What it's for
Features 18
- API monitoring with assertions on status codes, headers, JSON values
- Audit log
- Authenticated endpoint monitoring (API keys, bearer tokens, basic auth)
- Browser checks using real Chrome/Playwright scripts
- Configurable HTTP requests (method, headers, body)
- Cron job monitoring via check-in URLs
- Double-check verification before alerting to reduce false positives
- Heartbeat monitoring for servers, workers, and devices
- Historical data filters and rolled-up historical buckets for check results
- Maintenance windows
- Multi-location/geo-specific checks
- Multiple alert channels (Slack, Discord, Telegram, PagerDuty, Opsgenie, incident.io, Grafana OnCall, Microsoft Teams, SMS, Email, Webhooks, Pushover)
- Open-source CLI for terminal/CI use
- Public and private status pages with custom domain support
- Public HTTP API (OpenAPI-backed)
- SSL certificate expiration monitoring
- Status page email subscribers for incident updates
- Website/uptime monitoring with checks as frequent as every 30 seconds
At a glance
Integrations
Complianceself-reported
Pricing
Pro plan starts 'from $15/mo' with a base quota (10 monitors, 3,000 browser check runs) and additional usage billed via add-on rates. Enterprise pricing is custom/quote-based. Annual billing offers two months free.
Up to 2 users, 3 minute check interval, Limited status page, Basic alerting, Email alerts, Slack, Discord, and Telegram alerts, Community support, Email support
Up to 2 users, 3 uptime monitors, 3 minute check interval, 1,000 browser check runs/mo, limited status page, 14-day data retention, 100 email subscribers
Priced 'from $15/mo'; extra usage billed via add-ons.
10 monitors included, 3,000 browser check runs included, 30 second check interval, unlimited users, 12 months data retention, 1 status page included
Custom/quote-based pricing, contact for demo.
Custom inclusions and integrations
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