Free-tier uptime monitoring

NewReleases.io

NewReleases.io is a release tracking service for software developers and DevOps teams. It monitors supported source code and package registries such as GitHub, GitLab, Codeberg, Gitea, Bitbucket, PyPI...

StatusGator

StatusGator is a cloud monitoring and status page aggregator that tracks the availability of third-party services, cloud infrastructure, hosted applications, and websites. It combines vendor status ag...

Checkly

Checkly is a monitoring platform for uptime checks, API checks, browser checks, Playwright check suites, status pages, alerting, dashboards, and trace-based root cause analysis. It supports code-first...

linkok.com

linkok.com is a broken link checker that scans websites for link errors and reports results by email. It runs periodic scans, retries after temporary errors to reduce false positives, and provides a full report for review.

OnlineOrNot

OnlineOrNot is an uptime monitoring and status page service for software teams. It checks websites, APIs, cron jobs, heartbeat endpoints, and scheduled tasks at intervals as short as 30 seconds on pai...

UptimeToolbox

UptimeToolbox is a website monitoring and status page service for Linux servers and web applications. It supports monitor checks, SSL certificate monitoring, domain expiration checks, alert delivery b...

Healthchecks.io

Healthchecks.io is a cron job monitoring service that works by assigning each background job a unique ping URL. Scheduled tasks, backups, reports, and other jobs send an HTTP request to that URL when they run; if a ping does not arrive on time, the service sends an alert.

MonitorMonk

MonitorMonk is an uptime and performance monitoring service for websites and services. It checks website availability, SSL certificate status, keyword presence on pages, and response times, then displays the results on shareable status pages and dashboards.

UptimeRobot

UptimeRobot is an uptime monitoring service that checks websites, APIs, servers, and other endpoints to help teams detect outages and performance issues quickly. It provides real-time alerts, public s...

Pulsetic

Pulsetic is a website uptime monitoring service that checks websites, SSL certificates, ports, TCP endpoints, keywords, cron jobs, APIs, IP addresses, and domains. It sends downtime alerts by email, S...

StatusCake

StatusCake is a website monitoring service that checks uptime, page speed, SSL certificates, domains, and servers from multiple locations. It provides scheduled checks, alerting through integrations, and reporting for teams that need to track availability and performance.

Servervana

Servervana is a website performance and uptime monitoring service that checks HTTP, DNS, SSL, and API endpoints. It collects historical data, shows page loading behavior, and provides status pages and alert routing for issue detection and escalation.

Assertible

Assertible is a web service testing and monitoring platform for APIs and websites. It lets developers and QA teams create HTTP assertions, run post-deployment smoke tests, schedule uptime checks, and review detailed test results across environments such as staging and production.

IncidentHub

IncidentHub is a status page monitoring service that tracks third-party vendors, including cloud, SaaS, utility, and private status endpoints. It ingests public status pages, private status pages, and...

SweetUptime

SweetUptime is a server and website uptime monitoring service from DiCloud. It checks endpoints from 260+ global locations and supports real-time alerts through email, Slack, Discord, and Telegram. Th...

SyAgent

SyAgent is a server and uptime monitoring service for Linux hosts. It monitors servers, processes, disks, network, memory, and HTTP/PING/PUSH uptime checks, then sends alerts and shows charts and insights through the web app.

Wachete

Wachete is a web page monitoring and change detection service that checks a URL on a schedule and notifies users when the page content changes. It supports email alerts, phone notifications, and chat integrations such as Slack, Teams, Discord, and Telegram.

WebSitePulse

WebSitePulse provides a set of free web, DNS, email, and network test tools that run checks against a supplied URL, hostname, IP address, or email domain. The tools verify availability, response time,...

Cronitor

Cronitor is a monitoring platform built for developers and operations teams that need reliable visibility into jobs, websites, APIs, and infrastructure events. It combines cron job monitoring, uptime checks, heartbeat tracking, status pages, and real user monitoring in a single product.

elmah.io

elmah.io is a cloud service for .NET applications that collects error logs, uptime checks, deployment events, and scheduled-task heartbeats. It stores log messages in the cloud, syncs application errors automatically, and provides dashboards for monitoring, notifications, and issue tracking.

DigitalOcean Uptime

DigitalOcean Uptime is a server and endpoint monitoring service that helps teams detect slowdowns, outages, and SSL issues before they affect users. It continuously checks websites, applications, URLs, and IP addresses from multiple global regions and sends alerts through email or Slack.

Xitoring

Xitoring is a monitoring service for uptime checks, server metrics, SSL certificates, API endpoints, heartbeat jobs, and cron jobs. It uses an agent called Xitogent for Linux and Windows server monitoring, plus global check nodes for external uptime and synthetic checks.

Fivenines

Fivenines is a SaaS infrastructure monitoring platform for Linux and Windows servers, network devices, uptime checks, cron jobs, and workflow-based alert routing. It uses an open-source agent for server telemetry and supports HTTPS, TCP, ICMP, DNS, SNMP, a public REST API, and a Terraform provider.

Esper

Esper is an enterprise mobile device management platform for dedicated devices running Android, iOS, Windows, and Linux. It provides cloud-based device enrollment and provisioning, kiosk and multi-app...