GTmetrix vs. HTMeLd Comparison Chart

Seobility checks your complete website, by crawling all linked pages. All found pages with errors, problems with the on-page optimization or problems regarding the page content like duplicate content are collected and displayed in each check section. Of course, you can also analyze all problems of a single page in our page browser. For a sustainable and continuous review of your website, each project is constantly crawled and analyzed by our crawlers to track the progress of your optimization. You will also be notified by our monitoring service with the status of your website via e-mail, if server errors and major problems occur. Seobility not only provides a detailed SEO audit but also gives tips and instructions on how to fix the problems found on your website. By fixing these issues, you make sure that Google can access all of your relevant content and understand what it’s about in order to match it with suitable search queries.

We provide peace of mind to thousands of customers like Apple, Microsoft, IBM, Palo Alto Networks, Kraft, and BNP Paribas who trust us to monitor the performance, health, and downtime of their websites, applications, and infrastructure. We’ve been recognized as one of the world’s best web monitoring solutions by G2 and TechRadar Pro for several consecutive years, including this one. Use Uptime.com to: -Choose domains and configure checks to start monitoring web, network, and email performance at global scale. -Get accurate, moment-it-happens web downtime and performance alerts to any device or DevOps tool you use. -Customize system monitoring dashboards to report on critical data across alerts, check types, and SLAs -- segmented by account user or subaccount. -Quickly and professionally communicate downtime and outage statuses in the same tool you monitor website performance with. -Deliver alert notifications response time metrics into your teams go-to tools

NetCrunch is a powerful, scalable, all-in-one network monitoring system built for modern IT environments. It supports agentless monitoring of thousands of devices, covering SNMP, servers, virtualization (VMware, Hyper-V), cloud (AWS, Azure, GCP), traffic flows (NetFlow, sFlow), logs, and custom data via REST or scripts. With 670+ monitoring packs and dynamic views, it automates discovery, configuration, alerting, and automates self-healing actions for efficient remote remediation in response to alerts. Its node-based licensing eliminates sensor sprawl and complexity, providing a clear, cost-effective path to scale. Real-time dashboards, policy-driven setup, advanced alert tuning and 40+ alert actions including remote script execution, service restart, process kill or device reboot-make NetCrunch ideal for organizations replacing legacy tools like PRTG, SolarWinds, or WhatsUp Gold. Fast to deploy and future-proof. Can be installed on-prem, self-hosted in the cloud, or mixed.

Cloudflare is the foundation for your infrastructure, applications, and teams. Cloudflare secures and ensures the reliability of your external-facing resources such as websites, APIs, and applications. It protects your internal resources such as behind-the-firewall applications, teams, and devices. And it is your platform for developing globally scalable applications. Your website, APIs, and applications are your key channels for doing business with your customers and suppliers. As more and more shift online, ensuring these resources are secure, performant and reliable is a business imperative. Cloudflare for Infrastructure is a complete solution to enable this for anything connected to the Internet. Behind-the-firewall applications and devices are foundational to the work of your internal teams. The recent surge in remote work is testing the limits of many organizations’ VPN and other hardware solutions.

UptimeRobot is a website monitoring service with a forever free plan that lets you register with just an email and monitor up to 50 websites, servers, or keywords with 5-minute intervals. Setup takes only a few clicks. For faster checks and advanced features, paid plans offer 1-minute or 30-second intervals, along with SSL certificate, domain expiry, and heartbeat (cron job) monitoring. You can also create up to 100 status pages, customize them to match your brand, protect them with a password, and allow subscribers to receive updates. Get notified instantly via email, SMS, voice calls, or integrations with Slack, Zapier, PagerDuty, Splunk On-Call, Telegram, Webhooks, Discord, Mattermost, Pushbullet, Microsoft Teams, Google Chat, Pushover, and more. Mobile push notifications are available through the iOS and Android apps. Other features include maintenance windows, incident tracking with root cause analysis, tags, comments, and filters. Share account with other team members.

ManageEngine Site24x7 is a comprehensive observability and monitoring solution designed to help organizations effectively manage their IT environments. It offers monitoring for back-end IT infrastructure deployed on-premises, in the cloud, in containers, and on virtual machines. It ensures a superior digital experience for end users by tracking application performance and providing synthetic and real user insights. It also analyzes network performance, traffic flow, and configuration changes, troubleshoots application and server performance issues through log analysis, offers custom plugins for the entire tech stack, and evaluates real user usage. Whether you're an MSP or a business aiming to elevate performance, Site24x7 provides enhanced visibility, optimization of hybrid workloads, and proactive monitoring to preemptively identify workflow issues using AI-powered insights. Monitoring the end-user experience is done from more than 130 locations worldwide.

There are an estimated 25 million engineers in the world across dozens of distinct functions. As every company becomes a software company, engineers are using New Relic to gather real-time insights and trending data about the performance of their software so they can be more resilient and deliver exceptional customer experiences. Only New Relic provides an all-in-one platform that is built and sold as a unified experience. With New Relic, customers get access to a secure telemetry cloud for all metrics, events, logs, and traces; powerful full-stack analysis tools; and simple, transparent usage-based pricing with only 2 key metrics. New Relic has also curated one of the industry’s largest ecosystems of open source integrations, making it easy for every engineer to get started with observability and use New Relic alongside their other favorite applications.

OpManager is a network management tool geared to monitor your entire network. Ensure all devices operate at peak health, performance, and availability. The extensive network monitoring capabilities lets you track performance of switches, routers, LANs, WLCs, IP addresses, and firewalls. Monitor the finer aspects of your network: Hardware monitoring enables CPU, memory, and disk monitoring, for efficient. performance of all devices. Perform seamless faults and alerts management with real-time notifications and detailed logs for quick issue detection and resolution. Achieve network automation, with workflows enabling automated diagnostics and troubleshooting actions. Advanced network visualization-including business views, topology maps, heat maps, and customizable dashboards give admins an at-a-glance view of network status. 250+ pre-built reports covering metrics like device performance, network usage, uptime, facilitate capacity planning and improved decision-making.

TinyPNG (by Tinify) is a free image optimization tool trusted by developers and designers worldwide. It uses smart lossy compression to compress JPEG, PNG, WebP, and AVIF files by up to 80% without visible quality loss - boosting speed, SEO, and reducing bandwidth. Compress, convert, and resize images via our intuitive web app or powerful API, with an image CDN for fast global delivery. SDKs are available for Python, Node.js, PHP, Java, Ruby, and .NET. Includes an official WordPress plugin and a growing ecosystem of community-built integrations. Tinify is simple and accessible with no complex settings, no guesswork. It just works. Whether you're a beginner or building for scale, you get reliable results fast. All plans start with a generous free tier, and responsive customer support is here when you need help. George the panda 🐼 would be thrilled to see you give it a try.

Semrush One is an all-in-one digital marketing platform designed to help brands win visibility across search engines, AI platforms, and emerging discovery channels. It unites traditional SEO tools with advanced AI search and GEO capabilities to measure and grow brand presence everywhere users search. The platform supports optimization across Google, ChatGPT, Perplexity, Gemini, and more from a single interface. Semrush One offers toolkits for SEO, content marketing, traffic analysis, local search, advertising, social media, AI visibility, and digital PR. Powered by one of the world’s largest AI-driven marketing databases, it delivers deep insights competitors can’t easily replicate. Enterprises and marketers use Semrush One to forecast traffic, revenue, and ROI with confidence. Trusted by millions of professionals and global brands, Semrush One acts as a central growth engine for digital visibility.