
Downtime Monkey
UptimeRobot
Pingdom
StatusCake
updown.io
RapidSpike
Pingometer
AlertBot
Cachely.dev
nxCloud
Downtime Monkey provides a complete website monitoring service with both Free and Pro plans. Features include:
Global Monitoring: a network of global servers checks websites from 6 locations worldwide eliminating false positive downtimes
Response Time Monitoring: monitor the speed of your website and view graphs of response times
Keyword Monitoring: get notified when the content of your website changes unexpectedly
Alerts to email, SMS and Slack
Custom Alert Times: set the time a website should remain down before an alert is sent
Manage Multiple Sites: bulk upload, edit and delete sites. View the status of all your sites at a glance
Uptime Stats and Downtime Logs: uptime stats to 3 decimal places (e.g. 99.999%), logs of every individual downtime including the timestamp, duration, response code from the server and a short explanation of the reason for the downtime
60 monitors, every 3 minutes completely free
Pro accounts with all the features from $0.48 per month (or from โฌ0.48, ยฃ0.36 or A$0.68 and over 100 other currencies)
Cachely is the managed self-hosted remote cache for Nx and Turborepo - the cache backend you'd otherwise build and run yourself, hosted for you on Cloudflare's edge (R2). It's a drop-in replacement for a DIY @nx/s3-cache / S3 bucket setup: point your build tool at Cachely with a token and two environment variables, and share build cache across CI and every developer's laptop.
Unlike a self-hosted cache, Cachely enforces read-only tokens at the API, so pull-request and fork builds can read but never write - closing the Nx cache-poisoning attack (CVE-2025-36852). It adds ROI reporting (the real build minutes and dollars the cache saved), per-tool insights, and build-optimization suggestions on top.
Pricing is a flat per-workspace subscription with no per-seat fees - add every developer, bot, and CI actor without watching the bill. Cachely never stores your source code; it caches only task outputs and their content hashes. Nx and Turborepo today; Bazel on the roadmap.
Downtime Monkey
Cachely.devDowntime Monkey is especially suited for small to medium-sized businesses, web developers, and anyone managing multiple websites who need reliable uptime monitoring without the complexity and cost of more advanced tools.
UptimeRobot - Free Website Uptime Monitoring
nxCloud - nxCloud is a commercial OwnCloud provider
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
StatusCake - Website Uptime Monitoring & Alerts โ Free Unlimited Downtime Monitoring
updown.io - updown.io is a HTTP(S)/TCP/ICMP monitoring service which checks periodically the URL you want and reports back any anomaly.
RapidSpike - RapidSpike is a reliability, performance and security monitoring service for transactional websites. Using next-generation synthetic monitoring & deeper than ever before data, RapidSpike is for businesses serious about protecting their online revenue