Self-hosted alternatives to updown.io

Uptime Guard

Uptime monitor for websites, ports, DNS, certificates and cron jobs, with Telegram alerts and public status pages

What a updown.io user would miss

It covers ICMP ping, rechecks from another location, email/SMS alerts and a full status page only in part.

What it adds

It also has multi-step script checks, owner login that needs a password plus an authenticator code and data that stays in your Cloudflare account.

• Yes HTTP(S) monitoring with text matching. HTTP(S) checks with an optional body keyword present or absent, or a JSON field value.
• Partly TCP and ICMP ping checks. TCP port checks; no ICMP ping.
• Yes SSL certificate validity and expiry monitoring. TLS certificate expiry check, warns 14 days before by default.
• Yes Domain expiration monitoring. Domain registration expiry through RDAP, warns 30 days before by default.
• Yes Periodic task and cron job monitoring. Heartbeat monitors with a unique /ping URL and a grace window.
• Partly Downtime confirmed from at least two locations. A failed check is retried twice, 3 seconds apart, from the same Worker.
• Partly Alerts by email, webhook, Slack, Teams, Telegram and SMS. Telegram and Web Push only; email, Slack and Discord are on the roadmap.
• Partly Hosted status pages. Read-only public page per project with each monitor's status and 90-day uptime; no incident posts.

Sources:github.com/calmray-solutions/uptime-guard#readmegithub.com/calmray-solutions/uptime-guard/blob/main/worker/src/checks.ts

Serverless uptime monitor and status page with HTTP, TCP and keyword checks, deployed through GitHub Actions

What a updown.io user would miss

It has no certificate checks, domain expiry checks and cron job monitoring, and covers ICMP ping, rechecks from another location and email/SMS alerts only in part.

What it adds

It also has a password protected status page, a monitor status that can be embedded in another page and data that stays in your Cloudflare account.

• Yes HTTP(S) monitoring with text matching. HTTP(S) checks with responseKeyword and responseForbiddenKeyword options.
• Partly TCP and ICMP ping checks. TCP port checks; no ICMP ping.
• No SSL certificate validity and expiry monitoring. SSL certificate checks are unchecked on the README roadmap.
• No Domain expiration monitoring. No domain expiry checks.
• No Periodic task and cron job monitoring. No heartbeat monitor type.
• Partly Downtime confirmed from at least two locations. A grace period of failed checks before notifying; not rechecked from another location.
• Partly Alerts by email, webhook, Slack, Teams, Telegram and SMS. Webhook alerts with a grace period; no built-in email or SMS.
• Yes Hosted status pages. Status page with groups, incident history and scheduled maintenance.

Sources:github.com/lyc8503/uptimeflare#featuresgithub.com/lyc8503/UptimeFlare/blob/main/uptime.config.ts

Uptimer

Uptime monitor and status page with HTTP and TCP checks, incidents and webhook alerts, on Workers, Pages and D1

What a updown.io user would miss

It has no certificate checks, domain expiry checks and cron job monitoring, and covers ICMP ping, rechecks from another location and email/SMS alerts only in part.

What it adds

It also has incident timelines on the status page, signed, templated webhook messages and CSV export of uptime history.

• Yes HTTP(S) monitoring with text matching. HTTP(S) probes with keyword assertions on the response.
• Partly TCP and ICMP ping checks. TCP port checks; no ICMP ping.
• No SSL certificate validity and expiry monitoring. No certificate checks.
• No Domain expiration monitoring. No domain expiry checks.
• No Periodic task and cron job monitoring. No heartbeat monitor type.
• Partly Downtime confirmed from at least two locations. Failure and success thresholds before a state change; not rechecked from another location.
• Partly Alerts by email, webhook, Slack, Teams, Telegram and SMS. Webhooks to Discord, Slack, ntfy or any URL, plus a Telegram preset; no email or SMS.
• Yes Hosted status pages. Public status page with uptime, latency charts, incidents and maintenance windows.

Sources:github.com/vriancao/uptimer#featuresgithub.com/VrianCao/Uptimer/blob/master/docs/notifications.md