Best Website Monitoring Software - Page 7

How Many Website Monitoring Software Products Does G2 Track?

Total Products under this Category: 307

Category Stats (Oct 2026)

  • Average Rating: 4.58/5 The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Uptimia (+1.78%) - Among all products in this category, Uptimia recorded the largest rating increase compared to last month

Last updated: October 11, 2026

How Does G2 Rank Website Monitoring Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 9,000+ Authentic Reviews
  • 307+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Website Monitoring Software

G2 Grid® for Website Monitoring Software plotting products by satisfaction and market presence

Highlighted products: Site24x7, UptimeRobot, Uptime.com, Datadog, Better Stack, IBM Instana, Dynatrace, and Pulsetic.

Underlying data: [Grid® JSON](https://www.g2.com/categories/website-monitoring/grids.json?focus%5B%5D=site24x7&focus%5B%5D=uptimerobot&focus%5B%5D=uptime-com&focus%5B%5D=datadog&focus%5B%5D=better-stack&focus%5B%5D=ibm-instana&focus%5B%5D=dynatrace&focus%5B%5D=pulsetic)

PHP Server Monitor

PHP Server Monitor is an open source tool to monitor your servers and websites.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate PHP Server Monitor?

  • Baseline: 10.0/10 (Category avg: 9.0/10)
  • Reporting: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind PHP Server Monitor?

Who Uses This Product?

  • Company Size: 100% Medium

What Are Recent G2 Reviews of PHP Server Monitor?

What Are G2 Users Discussing About PHP Server Monitor?

PulseGuard

PulseGuard is an AI-powered uptime and performance monitoring tool that helps developers track website, API, and server health. It includes SSL alerts, EC2 start/stop support, and a clean dashboard — with pricing starting at $0/month.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate PulseGuard?

  • Baseline: 10.0/10 (Category avg: 9.0/10)
  • Reporting: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind PulseGuard?

Who Uses This Product?

  • Company Size: 100% Small

What Do G2 Reviewers Say About PulseGuard?

AI-generated summary from verified user reviews

Pros
  • Users love the easy setup of PulseGuard, allowing quick monitoring and control of AWS EC2 instances effortlessly.
  • Users value the time-saving automation of PulseGuard, streamlining AWS EC2 instance management efficiently and effortlessly.
  • Users praise the intuitive interface of PulseGuard for its ease of use and effective cloud resource management.
Cons
  • Users note integration issues primarily with cloud providers, limiting flexibility and accessibility for broader functionality.
  • Users find the poor mobile compatibility limits accessibility, especially for on-the-go monitoring of PulseGuard.
  • Users note the need for minor UI improvements to enhance usability, especially for mobile accessibility.

What Are Recent G2 Reviews of PulseGuard?

Request Metrics

The easy way to track your Core Web Vitals and boost website performance. Real-user monitoring with automatic noise-cancelling and actionable recommendations. Filters - Notifications - Search - Element Attribution - Vendor Tracking - Get started free.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate Request Metrics?

  • Has the product been a good partner in doing business?: 8.3/10 (Category avg: 9.2/10)
  • Ease of Admin: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind Request Metrics?

  • Seller: TrackJS
  • Year Founded: 2013
  • HQ Location: Stillwater, MN
  • Twitter: @trackjs
    1,816 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    3 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Request Metrics?

What Are G2 Users Discussing About Request Metrics?

AI can help you find the answers. G2 helps you trust them.

Connect G2 to Claude or ChatGPT for answers grounded in G2's trusted reviews, comparisons, and pricing from real user insights.

How it works

Semonto Website Monitoring

Semonto keeps an eye on your websites 24/7, and alerts you when something fails. So you can feel confident that your business is up and running at all times. Perfect when you are responsible for multiple websites and don't want to check them all manually. Users: Perfect for website agencies, SEO agencies and online publishers. Features • uptime monitoring • broken link monitoring • SSL monitoring (HTTPS) • mixed content monitoring • status pages • cron job monitoring • domain name expiration monitoring • Lighthouse monitoring • cron job monitoring • issue management Notification options • email • Slack • Teams • SMS • webhooks • Voice call Integrations • WordPress (plugin) • Craft CMS (plugin) • Other CMS systems (health endpoint) Other benefits • You can export and print a PDF performance report (white-label) • You can give access to your team members. Trial Semonto allows you to test all features for free during a 30-day trial.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate Semonto Website Monitoring?

  • Baseline: 10.0/10 (Category avg: 9.0/10)
  • Reporting: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind Semonto Website Monitoring?

Who Uses This Product?

  • Company Size: 100% Small

What Do G2 Reviewers Say About Semonto Website Monitoring?

AI-generated summary from verified user reviews

Pros
  • Users value the responsive customer support of Semonto, appreciating their quick implementation of feedback and enhancements.
  • Users find Semonto's system to be extremely easy to use, making monitoring server issues effortless and effective.
  • Users find Semonto's easy setup and installation process to be a game changer for monitoring server issues.
  • Users appreciate the excellent responsiveness of Semonto, valuing how feedback is acted upon effectively and promptly.
  • Users find the installation ease of Semonto remarkable, appreciating its user-friendly setup and all-in-one solution.

What Are Recent G2 Reviews of Semonto Website Monitoring?

Testomato

Uptime monitoring tells you your server is responding. It doesn't tell you your site is actually working. Content can disappear, SSL certificates expire, and structured data breaks without your uptime monitor ever firing. Most tools that go deeper require scripting and engineering time to set up and maintain. Testomato is a website monitoring tool that goes beyond uptime to monitor page content, SSL certificates, response times, meta tags, JSON-LD structured data, and more. No-code checks are easy to configure in a couple of minutes. Add your URL, define what you want to watch, and get instant alerts via email, Slack, PagerDuty, Pushover, or Pushbullet when something breaks. Uptime checks run every 15 seconds from 9 locations around the world. Never miss a thing.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate Testomato?

  • Baseline: 10.0/10 (Category avg: 9.0/10)

Who Is the Company Behind Testomato?

  • Seller: Devel.cz Lab
  • Year Founded: 2012
  • HQ Location: Prague 4, CZ
  • Twitter: @testomatocom
    1,015 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    5 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Large

What Are Recent G2 Reviews of Testomato?

Updown.io

updown.io is a HTTP monitoring solution with a clean UI and a cheap and simple pricing.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind Updown.io?

  • Seller: Updown.cio
  • HQ Location: Paris, France
  • Twitter: @updownio
    1,009 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    1 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Updown.io?

Upkepr

UpKepr is your go-to solution for comprehensive website performance monitoring, tailored for developers, web agencies, and site owners. It streamlines your workload by handling continuous monitoring and maintenance, ensuring your website remains healthy and secure. Simply add your site to UpKepr, and let it take care of the critical tasks that keep your site running smoothly and protected at all times.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate Upkepr?

  • Reporting: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind Upkepr?

Who Uses This Product?

  • Company Size: 100% Medium

What Do G2 Reviewers Say About Upkepr?

AI-generated summary from verified user reviews

Pros
  • Users love the easy setup of Upkepr, appreciating its clear reports and helpful monitoring features.
  • Users love the 24/7 monitoring of Upkepr, providing peace of mind with prompt alerts for any issues.
  • Users love the 24/7 monitoring and notification system of Upkepr, ensuring their sites remain functional and prioritized.
  • Users love the 24/7 performance monitoring of Upkepr, appreciating the clear and actionable site audit reports.
Cons
  • Users find the plan limitations restrictive for multiple sites, needing upgrades for more frequent scans.

What Are Recent G2 Reviews of Upkepr?

Visual Sentinel

Visual Sentinel is a 6-layer website monitoring platform that goes beyond basic uptime checks. It monitors Uptime, Performance (Core Web Vitals), SSL certificates, DNS records, visual changes (pixel-diff screenshots), and content integrity. Teams receive instant alerts via Email, Slack, Discord, WhatsApp, Telegram, or webhooks when any layer detects an issue. Every alert includes visual evidence — before/after screenshots and pixel diffs — so teams can diagnose and resolve problems fast. Designed for agencies, SaaS companies, and DevOps teams managing multiple websites.

Average Rating: 5.0/5.0

Total Reviews: 1

How Do G2 Users Rate Visual Sentinel?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 9.2/10)
  • Ease of Admin: 10.0/10 (Category avg: 8.9/10)

Who Is the Company Behind Visual Sentinel?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Visual Sentinel?

Web Vitals Tracker

Free Web Vitals Tracking.

Average Rating: 3.0/5.0

Total Reviews: 1

Who Is the Company Behind Web Vitals Tracker?

Who Uses This Product?

  • Company Size: 100% Small

Wormly

Wormly is a website uptime monitoring solution.

Average Rating: 3.5/5.0

Total Reviews: 1

How Do G2 Users Rate Wormly?

  • Baseline: 6.7/10 (Category avg: 9.0/10)
  • Reporting: 6.7/10 (Category avg: 8.9/10)

Who Is the Company Behind Wormly?

Who Uses This Product?

  • Company Size: 100% Medium

What Are G2 Users Discussing About Wormly?

Admin Labs' Website Monitoring

AdminLabs provides powerful monitoring and communication services for your business.

Who Is the Company Behind Admin Labs' Website Monitoring?

  • Seller: Admin Labs
  • Year Founded: 2016
  • HQ Location: Jyväskylä, FI
  • Twitter: @adm1nlabs
    227 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    2 employees on LinkedIn®

Agent Slug

Agent Slug is a little creature that is happy to monitor your website. At the moment it can monitor website’s uptime and trigger alerts when your application (e.g. CRON job) is dead Test it by yourself, it costs nothing!

Who Is the Company Behind Agent Slug?

Alertdesk

Keep track of your domain health. See how real users experience your page and Uptime monitoring from multiple locations

Who Is the Company Behind Alertdesk?

Alertiv

Alertiv is more than just a monitoring tool – it’s a collaborative hub that unites developers, hosting providers, and digital marketers to build, manage, and grow digital experiences seamlessly. From uptime monitoring to issue tracking and performance optimization, Alertiv empowers your team to work together for impactful digital results.

Who Is the Company Behind Alertiv?

AlertSleep

AlertSleep is a 24/7 uptime monitoring service that instantly alerts you when your website, API, or server goes down — before your customers notice. Get notified within 60 seconds of downtime via SMS, phone call, email, Slack, or webhook. AlertSleep monitors HTTP/HTTPS endpoints, REST APIs, TCP ports, SSL certificates, and page speed from multiple global locations (North America, Europe, and Asia), using multi-location verification to eliminate false positives. Unlike other monitoring tools, AlertSleep includes phone call alerts and SMS on every paid plan — no premium upgrades or usage credits required. The Pro plan also offers unlimited team members with no per-seat pricing, making it ideal for growing teams and agencies managing multiple client sites. Key features include: 1-minute monitoring intervals on all paid plans SSL certificate expiration alerts (30, 14, and 7 days in advance) Public status pages that update automatically during incidents 365-day data retention on the Pro plan REST API for programmatic access Free diagnostic tools (SSL checker, DNS lookup, port checker, and more) Plans start at $0/month with a generous free tier, scaling to just $10/month for the full-featured Pro plan. Perfect for startups, SaaS companies, e-commerce stores, developers, and agencies who need enterprise-grade reliability without the enterprise price tag.

Who Is the Company Behind AlertSleep?

Tian Lin
TL
Researched and written by Tian Lin
Updated April 9, 2026