Apps similar to OneUptime include Uptime Kuma, which is free and open source. Other options are Better Stack, UptimeRobot, Pingdom and Kener. Website Monitoring Tools like OneUptime are a crowded field, with more than 100 alternatives for the web, self-hosting, Windows, iPhone and Android.
Latency Atlas helps teams monitor websites, APIs, and scheduled jobs with multi-region checks, response time history, status pages, heartbeat monitoring, and an API for automation.
Japan
Website monitoring that helps detect and resolve issues before they impact website users. Response time tracking, keyword monitoring, custom alerts via WhatsApp, email, SMS, and more.
Georgia
Covers uptime, cron jobs, SSL and domain expiry, TCP ports, DNS records, and tracks incidents, with per-monitor alerts via Telegram, Slack, SMS, and more, white-label status pages, robust history, API access, self-hosting, and maintenance features.
Uptime and error monitoring for websites, APIs, ports, DNS and SSL certificates — instant alerts across 12 channels, grouped error tracking and public status pages, GDPR-compliant.
Germany
EU
Run instant uptime diagnostics from your phone, or let Pro watch your targets automatically from the cloud, every 5 minutes. A simple, mobile-first uptime monitoring app for developers, freelancers, and small business owners.
Website and infrastructure monitoring for uptime, SSL, DNS, APIs, email servers, ports and private services. It combines 26 check types, five-region verification, private workers, public status pages, SLA reports and alerts through 10 channels.
CzechiaEU
Notifier monitors your websites, APIs, and servers around the clock and alerts you the moment something goes down. It checks as often as every 30 seconds and sends notifications through email, SMS, voice calls, and Slack so you never miss an outage.
United States
RelayRadar is an operator-focused reliability platform that combines uptime monitoring, incident alerts, and domain intelligence into a single workflow.
United States
Free uptime monitoring for websites, servers and APIs. Supports HTTP, TCP, UDP and ICMP. Instant alerts to Telegram, Discord, Slack.
Belarus
Valla DNS is a free, no-signup, all-in-one domain and network intelligence toolkit for developers, sysadmins, and IT professionals. It brings the checks you normally spread across a dozen sites into one fast, dark-mode-friendly interface, with no login and no paywall.
United States
Stasis uses machine learning to model normal activity patterns for your website or app, then lets you know if something looks unusual.
Ultralight open source server monitoring agent, written in Rust. Ships CPU, RAM, disk and network metrics over OTLP to any compatible backend.
Spain