Alternatives to Calibre
Compare Calibre alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Calibre in 2026. Compare features, ratings, user reviews, pricing, and more from Calibre competitors and alternatives in order to make an informed decision for your business.
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1
New Relic
New Relic
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. -
2
CloudQA
Statnetics, LLC
CloudQA offers a powerful no-code/low code automation platform to speed up regression testing OR continuous monitoring of web applications. Type, click, and interact with your site as you normally would. Our recorder captures all of your actions as you navigate your site. No worrying about complexities like nested iFrames or dynamic elements. Intuitive and intelligent script maintenance - Manage tests/monitoring scripts with visual editor, as it creates a dynamic test model that is updated to reflect changes in your application. Automate complex steps with simple JavaScript & select variable data sets. With automation accelerators you require no setup, no infrastructure & no lock-in. Get high volume parallel, scalable & collaborative testing in cloud. Out of the box support for legacy & latest web technologies. See live execution of your tests, share summary & detailed reports with screenshots. Integrate with your tech stack and setup custom notifications.Starting Price: $99.00/month -
3
AudioEye
AudioEye, Inc.
AudioEye is cloud-based digital accessibility platform helping businesses of all sizes build inclusive and compliant websites. Specializing in speed to compliance with ADA-related digital accessibility requirements, AudioEye's technology, paired with manual audits, helps ensure that digital content is more accessible and usable for all audiences while also being WCAG-compliant. AudioEye continues to monitor for new issues with every site visitor, ensuring continued accessibility. You will get your first AudioEye Accessibility Score the moment you sign up. From then on, AudioEye continues to provide you a clear and actionable score quantifying your risk and identifying opportunities for improvement. AudioEye's patented technology tests for over 400 accessibility and compliance issuesStarting Price: $49 per month -
4
SpeedCurve
SpeedCurve
See how real people experience the speed of your website. Then find (and fix) your web performance problems. At SpeedCurve, we measure the interplay between web design and web performance. We offer user experience monitoring tools that give you true insight into what your visitors are experiencing. We help developers, designers and managers demonstrate to the wider organization how fast (or not) the user experience is and how you compare to your competition, enabling you and your team to make better informed decisions. Knowing which of your competitors are faster than you is a fantastic way to get web performance buy-in throughout your organization. Bonus: It's super easy to set up! Extra bonus: You can also generate great visualizations – like side-by-side videos and filmstrips – to share with your team. User engagement charts let you use your own data to understand the impact of page slowdowns on your site's bounce rate.Starting Price: $114 per month -
5
Apdex
Apdex
Improve your users' satisfaction. Gain insights into your website's availability and performance to increase conversion rate and income. Uptime, Performance and SSL monitoring, all combined in one UI. Downtime happens, be the first to know. Track availability of your website, server or API to get instant notifications of downtime. Focus on what matters to your users. Constantly measure the user experience metrics of your Website with Lighthouse tool to improve customers' satisfaction. Do not miss downtime or degradation of response time by receiving notifications to your favorite channels. Increase users' confidence by sharing your uptime statistics. Track what's important, create public status pages with your Website or API availability information. Monitor core web vitals as well as other core lighthouse metrics. Get hints to provide best experience to your customers. Do not miss chance to improve.Starting Price: $5 per month -
6
Request Metrics
Request Metrics
Request Metrics makes web performance easy with real-user monitoring and automated Lighthouse testing—helping you boost Core Web Vitals, SEO, and user experience. Track real visitors, not just lab tests, with automatic noise cancellation, actionable insights, and detailed element attribution. Our scheduled Lighthouse tests detect regressions before they hurt rankings, while real-user data keeps you informed on how your site performs in the wild. Filter by page, device, region, or vendor to uncover performance bottlenecks, and get instant alerts when something slows down. With built-in vendor tracking, you’ll know exactly which third-party scripts are hurting your load times. No complicated setup, no code changes—just fast, reliable performance monitoring designed for modern websites. Get started for free today!Starting Price: $34 per month -
7
DebugBear
DebugBear
DebugBear is a web performance monitoring tools that helps companies keep their website fast and pass Google's Core Web Vitals assessment. Find out how to optimize your website and get alerted when there's a problem. Run scheduled synthetic tests, monitor data from Google's Chrome User Experience Report (CrUX), and collect real user analytics directly on your website. Track Google Lighthouse scores over time and benchmark against your competition. Get custom performance recommendations with detailed analysis, and quickly try out performance optimizations with page speed experiments – without deploying any code!Starting Price: $125/mo -
8
Auditzy
Auditzy
Auditzy brings you reports in a few clicks, while most page speed tools require detailed setup and supervision. With Auditzy, businesses understand their web page performance, accessibility, and Technical SEO insights across multiple technical parameters to enhance visitor interactivity experience for websites. These checks highlight opportunities to improve the performance of your web app. Auditzy offers a free web page speed test through a simple and user-friendly graphical interface to provide a quality performance report. With Auditzy, gain insights and suggestions about your performance metrics and how to improve them in business terms. Auditzy insights are not just limited to your website. You can also deep dive into competitive analysis and compete in a smarter way with your competitors. Auditzy™ provides comparative analysis across multiple portfolios to understand and overcome your shortcomings.Starting Price: $5 per month -
9
W3SpeedX
W3SpeedX
W3SpeedX is a 24/7 website performance monitoring tool designed to help businesses proactively track and improve their site's speed and user experience. It provides real-time insights into core web vitals metrics, enabling users to identify and address performance issues before they impact visitors. It offers customizable dashboards, detailed performance reports, and stores data for up to three months, allowing users to analyze trends and make informed decisions. W3SpeedX empowers users to maintain optimal website performance and enhance user satisfaction. We make sure your website works well all the time. Our core web vitals monitoring tool helps you find and fix speed problems before your users see them, because a great experience makes them want to return. Keep an eye on how your site performs over time and find ways to make it faster in just a few seconds. Our webpage analysis tool makes it really easy to improve your site with simple and clear graphs.Starting Price: $50 per month -
10
MachMetrics
MachMetrics
MachMetrics continually monitors the speed of your website So you know exactly how your pages are performing: - throughout the day - around the world - on various devices Daily scheduled tests ensure you're always monitoring performance. Analyze from desktop + mobile. International locations. Custom scripting for advanced scenarios. Speed consultants worldwide trust us with their webperf needs. Setup in seconds. No code to install. 30 day free trial.Starting Price: $9 per month -
11
LoadFocus
LoadFocus
All-In-One cloud testing platform for load testing and performance testing, website speed testing, website UI testing, mobile applications and API endpoints. Easy upload and run JMeter tests from multiple cloud locations with thousands of users. Inspect real-time performance metrics for your Website and APIs with Apache JMeter from the cloud. Monitor changes over time and get advice on how to reduce page load times. We run your tests from cloud instances at scheduled times and notify you if something goes wrong. Load your websites and web pages in mobile emulators and inspect screenshots to find potential rendering issues, invalid HTML, missing images, wrong CSS. Schedule runs and inspect rendered images on all devices in just seconds. Emulate your site across different screen sizes and resolutions. Generate screenshots of two websites in just seconds and compare the generated screenshots by a threshold to check differences.Starting Price: $24 per month -
12
DareBoost
DareBoost
Dareboost is an amazing service to monitor the front-end performance of your web pages and user journeys, giving comprehensive insights for speed and quality optimization. - Website Speed Test - Website Analysis - Website Speed Test Comparison (competition benchmark) - Synthetic Monitoring - User Journey Monitoring (conversion funnel, etc) - API - Custom DashboardsStarting Price: $22.00/month/user -
13
Plomer
Jiti
Plomer is a modern website and domain monitoring platform that tracks uptime, SSL status, DNS changes, and performance metrics in real time, with instant alerts and detailed logs. Plomer is a comprehensive monitoring platform designed for developers, startups, and businesses that depend on website reliability. It continuously monitors websites, APIs, and domains to detect downtime, SSL certificate issues, DNS changes, and performance degradation. Users receive real-time alerts via notifications, allowing them to respond before issues impact customers. Plomer provides a clean, modern dashboard with logs, historical uptime data, and actionable insights. It is built for speed, simplicity, and reliability, offering an alternative to legacy monitoring tools with a more developer-friendly and mobile-first experience.Starting Price: $59.99/year/user -
14
PageSpeedPlus
PageSpeedPlus
PageSpeedPlus is a real-time website performance monitoring tool that tracks Core Web Vitals, runs automated Lighthouse audits, and sends instant alerts when metrics fall below target. Designed for agencies, developers, and site owners, it helps identify performance issues before they impact SEO, conversions, or user experience. Tests run frequently using real browser conditions across desktop, mobile, or custom devices, with alerts delivered via Slack, Microsoft Teams, email, or webhook. PageSpeedPlus stores unlimited test history, making it easy to visualize long-term trends, pinpoint regressions, and generate white-label reports. Integrations with Zapier, REST API, and CI/CD pipelines enable seamless workflow automation—automatically blocking slow deployments or triggering rollbacks when site speed drops. With global testing locations, detailed diagnostics, and customizable thresholds, PageSpeedPlus makes it easy to stay compliant with Google's Core Web Vitals and deliver aStarting Price: $20/month -
15
Prodly AppOps
Prodly
Remove the bottlenecks in application development, so administrators and other non-technical users can configure, test, and release apps faster, more reliability, and with less interruption to users. Our AppOps platform automates the entire development lifecycle for low-code applications giving administrators easy to use tools for change management, version control, regression testing, and reference data deployment. Speed through release management by automating tedious reference data deployments between Salesforce orgs. Our templates make managing even the most complex, relational data sets a breeze. So you can deploy faster than you can say change set. Sometimes small changes have unexpected consequences. Not to worry; we’ve got you covered with automated regression testing. Find and fix bugs—before they’re introduced in production. Keep your apps running smoothly and roll out new features with certainty. -
16
Uptimia
Uptimia
Website performance monitoring service from 171 worldwide checkpoints, on six continents. Monitor the uptime of HTTP, HTTPS, DNS, UDP, TCP, email and more. Checks are performed as often as every 30 seconds, from 171 checkpoints! Monitor full website performance by loading it with a real Chrome browser. Receive reports on loading speeds or alerts if something goes wrong. Monitor web transactions (login forms, check-out forms, etc.) and be notified if something goes wrong. Find out where the problem has occurred precisely! Monitor the speed of user experience for visitors to your website. Receive detailed reports on loading speeds by country, browser, OS and more. -
17
GTmetrix
GT.net
How fast does your website load? Find out with GTmetrix See how your site performs, reveal why it's slow and discover optimization opportunities. We'll breakdown your page performance in a summarized report. Get a detailed assessment with: PageSpeed and YSlow scores and Recommendations Page Load Details (time, size, number of requests) Various Analysis Options Waterfall, Video and Report History Set up an alert and get notified when your page underperforms. We'll send you an alert linked to a full report so you can know what happened. Test your page on a real Android device or on over 20 different Simulated Device options. Analyze your performance with iPhones, iPads, Samsung Galaxy/Note, Google Nexus/Pixel phones, and other popular devices.Starting Price: $14.95 per month -
18
StatusCake
StatusCake
StatusCake.com is a free website monitoring service ensuring that website owners are alerted the moment their website goes down or is experiencing problems. StatusCake premium plans allow multiple websites to be monitored (300 on the Business plan), as well as selecting the global location from where uptime is tested from. Additional features include page-speed testing, domain monitoring, server monitoring, SSL monitoring, as well as virus and malware scanning. We'll keep an eye on your website performance for you in the background. Website downtime happens. We'll send you a notification letting you know when it does. Sit back. Relax. Focus on your business. Let us worry about your uptime. Website monitoring that does all the hard work for you. We’ll alert you when your website goes down. With 30 second check rates and 30 different countries to monitor from, you’re in safe hands.Starting Price: $24.99 per month -
19
ManageWP
GoDaddy
A better way to manage WordPress websites. In minutes set up ManageWP and add your first website. With one click run all updates and create your first backup for FREE. Automate your workflow and start saving time. Automate your daily tasks with our one click login and bulk updates for all of your websites. Secure your data with reliable backups and protect your website with regular security checks. Stay on top of things and monitor your websites with Uptime Monitor, SEO and Google Analytics. Use collaborate tool for your teams and clients. One click switch between the accounts. Take your client care to a new level with our Client Reports and White Label tool. Optimize your website performance and speed with our Performance Check. Optimize your website performance and speed with our Performance Check. Take your client care to a new level with our Client Reports and White Label tool. -
20
Loado
Loado
Loado tracks and analyzes the performance of your websites. We use Core Web Vitals and User Timings to do this, and we alert you on time if there are any problems. This allows you to keep your website running smoothly and efficiently. Analytics are collected from real users using Web Vitals, this is real data that you get instantly. By using granular analytics from Loado, developers could optimize application performance for specific pages, device types, or even geographic regions. The page performance becomes an important ranking signal for Google. A faster site means a higher ranking position which tends to lower marketing costs. Core Web Vitals are a set of website metrics that consider speed, responsiveness, and visual stability. Just add one script tag to the Head section and start collecting the data. -
21
Foo
Foo
Analyze historical records of Lighthouse tests with automated monitoring. Report with confidence about SEO and performance improvements to stay on top of changes when they happen! After creating an account, you'll have access to dashboards displaying charts from automated Lighthouse runs. Automatically test and monitor website performance, SEO and accessibility with Lighthouse. Lighthouse is an open-source tool created by the Google Chrome team. Lighthouse is used to analyze web page quality based on a set of modern, "user-centric" metrics. By analyzing and addressing results from Lighthouse reports you can improve user experience, performance and SEO. Search engines now prioritize websites that are fast, mobile-friendly, and accessible. Services like Foo simplify SEO and performance testing by automating Lighthouse testing. Foo provides a UI to run Lighthouse on URLs manually and automatically.Starting Price: $60 per month -
22
MCM Alchimia
Alchimia Software
This is the latest release of the freeware application MCM Alchimia, which was developed specifically for estimating uncertainty of measurement and calibrations by Monte Carlo method consistent with JCGM 101. This release adds a complete GUM framework uncertainty budget, and, like the preceding version have support on correlated quantities and regression curves. Speed increase comparable to popular calculation and statistics software. Simulation in direct, inverse and total least squares. Custom application language through the external module. Output report with exhaustive statistical study of the simulation. -
23
Qualisense Test.Predictor
QualiTest Group
Qualisense Test.Predictor is our new AI-powered tool that dramatically improves risk-based testing strategies. It uses AI and automation to speed up time to release, cut costs and redeploy resources to focus on what matters most. With more than 6X increase in release velocity you can dramatically improve speed to market. Achieve more with less is not just a slogan when it comes to Test.Predictor, it’s a method of operation. These innovative AI capabilities are transforming software testing and reinventing regression testing. Test.Predictor empowers business users and data analysts to create prediction models independently. Simply put, it’s the ultimate testing solution. Qualisense, our proprietary AI-powered tool, dramatically improves risk-based testing strategies. It uses AI and automation to speed up time to release, cut costs and redeploy resources to focus on what matters most to your business. -
24
Keysight Eggplant
Keysight Technologies
Keysight Eggplant is an AI-powered software testing platform that helps teams automate functional, regression, and performance testing across any system or platform. Built to eliminate repetitive manual testing, it ensures faster releases, broader coverage, and higher-quality applications. With capabilities spanning UI, performance, and mobile app testing, Eggplant allows organizations to validate real user experiences using computer vision and OCR-based automation. It seamlessly integrates into CI/CD pipelines like Jenkins, Azure DevOps, and GitHub for continuous testing at every code check-in. Supporting technologies from legacy GUIs to cloud-native apps, it delivers consistent reliability across complex environments. Trusted by global enterprises and organizations such as NASA, JetBlue, and the US Army, Keysight Eggplant enables smarter testing and better software outcomes. -
25
Meteor App
Opensignal
Meteor is an ad-free internet speed test tool that can be used to check the speed of your mobile connection (on 3G, 4G LTE or 5G network connection), as well as for WiFi speed testing. Meteor’s unique speed test allows you to see how your internet connection and download speed will affect the performance of your favorite mobile apps. You can test app performance for up to six mobile apps at a time, from 27 of the most popular apps and games around the world. One simple speed test gives you easy-to-understand results for download speed, upload speed and ping time. Then, simply choose the apps you use most to see how they are impacted by your current network connection - no more trying to work out whether your network service provider is delivering the 5G connection you need. View all of your internet speed tests by location on a map and sort them by best and worst performance. -
26
PageWatch
PageWatch
Track updates of your entire site. Catch website issues before your users do. Find visual bugs on every page. Studies show up to 85% of visitors are more likely to leave after seeing errors on your site. See how new changes affect the rest of your site and catch any unexpected side effects before it becomes a problem. PageWatch analyzes your website using Lighthouse to identify slow pages that might hurt your conversions. PageWatch is a zero config tool for front-end testing. It allows you to test any site for performance issues, broken layouts, spelling mistakes, broken links and more. You can run PageWatch as part of your continuous integration process. On every pull request or deploy you'll be able to test your site and catch any issues before it becomes an issue. Our Netlify build plugin can run PageWatch audits automatically from pull request previews or production builds.Starting Price: $29 per month -
27
Giskard
Giskard
Giskard provides interfaces for AI & Business teams to evaluate and test ML models through automated tests and collaborative feedback from all stakeholders. Giskard speeds up teamwork to validate ML models and gives you peace of mind to eliminate risks of regression, drift, and bias before deploying ML models to production.Starting Price: $0 -
28
AnalyticsVerse
AnalyticsVerse
Increase visibility, eliminate blockers, and deliver faster. We correlate data from your Git repositories and project management tools and generate easy-to-understand reports with actionable metrics and insights. Spot bottlenecks within your teams and resolve them before they affect delivery. Look at things like cycle time of MRs, risky MRs, and higher team inactivity. Track process improvements and avoid having to guess whether your changes are actually working. Run a truly agile engineering team. You can easily identify overburdened or blocked developers in your team and help them out! Get the power of a BI tool without having to define and compute metrics. Also, create your own customized dashboards with metrics and visualizations that matter to you. Focus more on improving things at a team and project level without trying to improve and manage developer productivity. Understand the speed and stability of your projects through research-backed DORA Metrics.Starting Price: $13.70 per month -
29
Varnish
Varnish Software
Varnish Software’s powerful caching technology helps the world’s biggest content providers deliver lightning-fast web and streaming experiences for huge audiences, without downtime or loss of performance. Our solution combines open-source flexibility with enterprise robustness to speed up media streaming services, accelerate websites and APIs, and enable global businesses to build custom CDNs, unlocking unbeatable content delivery performance and resilience. Our customers include Hulu, Emirates and Tesla, and our technology is powered by a caching layer that’s trusted by more than 10 million websites worldwide. -
30
Screpy
Screpy
Complete the guide tasks created with the power of AI, increase page speed, improve your UX, eliminate cross-device errors, and guarantee 100% SEO success. Meet your toolset powerful yet easy to master! Screpy won’t overwhelm you with complex metrics, code algorithms, and technical concepts! It analyzes, presents scores, and creates step-by-step guidelines to help you reach a wider audience. No more feeling amateurish when competing with masters in the market! Be stronger, bigger, and more ambitious! Aren’t you a professional? That is okay! Screpy offer you step-by-step tasks to do, and show the potential influence of each of them on your overall score! How can you increase your traffic if you don’t know where you are exactly? Screpy tells you the truth! We analyze your ranking for each and every keyword, offer you related keywords to be targeted and show you how your web page grows step by step. Make your work, click on Screpy, see what you have managed.Starting Price: $2 / mo -
31
AppBeat
AppBeat
We help monitor your online services and catch issues & anomalies before they reach your end customers and become costly incidents! To detect outages, unexpected behavior & performance regressions. Minimize risk of losing customers, time, money & brand reputation. Our globally distributed monitoring probes check your publicly exposed web pages and web services via TCP or UDP protocols. We run millions of checks every day, 24/7. We have 6 years of experience in this field, our solution is mature, easy to use and very reliable. As an additional guarantee, we offer a service level agreement (SLA) option for our high-end monitoring plan(s). Measuring response times and uptime, checking for valid HTTP(S) response, ensuring page integrity with SHA-256 hash. Never forget to renew your web server certificate with our TLS / SSL monitoring. We will send periodic ping requests to your servers to check if they are alive. -
32
Jetpack for Wordpress
Jetpack
Security, performance, and marketing tools made for WordPress sites by the WordPress experts. Always-on Security. Real-time backups save every change, while instant downtime alerts and one-click restores get you back online quickly. Malware scanning and one-click fixes keep your site ahead of security threats. Automatically block spam from comments and forms. Built-in Performance. Load pages faster, and serve your images and static files from our global network of servers. Improve your site speed and take control of your SEO with Jetpack’s site accelerator. Shorter load times can lead to happier readers, more page views, and, if you’re running a store, improved sales. Code-free Customization. Jetpack Search helps your visitors instantly find the right content, so they buy more products and stay on your site longer. Seamlessly embed rich content and videos, deliver them all at high speed, with an ad-free experience.Starting Price: $9 / mo -
33
Trakr
FFW
Add one or more websites you’d like to test. Trakr will identify your most important pages and automatically begin monitoring them. Each time a change is deployed, Trakr will test those changes across up to four devices or breakpoints and will notify you if any visual defects are found when compared. Create a screenshot collection for your website. Trakr will take a screenshot for all URLs and device/breakpoints you have specified. You can use this screenshot collection to compare with others later when you create a new website release. Perform visual testing when you update your website to check for any defects. Trakr also works with your favorite DevOps/workflow tools to automate the visual testing process. Create and share comparison reports with your team. Your colleagues, your clients, and your stakeholders will all thank you.Starting Price: $59 per user per month -
34
Internet Speed Test
VeeApps
Simple Speed Test is a free internet speed meter it can test the speed of your Wifi, 5G or 4G LTE internet connections from 100+ severs worldwide with accurate fast results. Simple Speed Test is an easy-to-use, fast, reliable and free network tool for testing your Internet download speed, upload speed, and ping time. Use the Speed Test app to see just how fast your Internet connection really is from anywhere in the world, whether on a mobile or broadband connection. The simple streamlined design makes it easy to use and understand. Real-time speed test for your download, upload speed. Network ping & jitter test. 5G & LTE speed test, check the speed of your mobile carrier. Split view and slide over support on iPad. History tracking of all your past results. Cellular and Wi-Fi network speed test. One-touch testing in under 30 seconds. Troubleshoot and verify the speed your ISP promised you. Fully detailed result view with a map of test location.Starting Price: $0.99 one-time payment -
35
Better Stack
Better Stack
Better Stack is an eBPF-based, AI SRE observability tool that helps you ship better software, faster. Schedule on-call rotations, receive actionable alerts, and resolve incidents with ease. Better Stack brings together incident management, uptime monitoring, status pages, log management, and infrastructure monitoring – all in one place. Built for speed and scale, it combines multiple monitoring and alerting workflows into a single, powerful interface that boosts visibility and slashes response times. Key features include an OpenTelemetry-native Kubernetes collector powered by eBPF, real-time alerting, and collaborative dashboards. Under the hood, Better Stack runs on ClickHouse, enabling lightning-fast queries and scalable ingestion across high-cardinality datasets. You can visualize your entire stack, turn all your logs into structured data, and query everything with SQL – as if it were a single database. Seamlessly integrates into your workflow with 100+ integrations.Starting Price: $29 per month -
36
Modular DS
Modular DS
Modular DS makes it easy to manage and monitor multiple WordPress websites, helping freelancers and agencies save time, avoid repetitive work, and focus on growing their business. Instead of relying on multiple plugins and tools, it allows you to automate your maintenance tasks from a single, intuitive dashboard. Key features include bulk and safe updates, backups, restores, performance checks, uptime monitoring, vulnerability scans, and database optimization. Modular DS also lets you generate automated maintenance reports that clearly show clients the work you do. It integrates with Google Analytics, Search Console, WooCommerce, and PageSpeed, giving you an overview of your sites in one place and letting you include the data your clients care most about in your reports. The platform offers a 14-day free trial, transparent subscription plans, and regular new features based on user feedback.Starting Price: $16/month -
37
Odown
Odown
Odown is a website uptime monitoring tool that helps you maintain customer trust by tracking your website’s performance in real-time. Monitor uptime, availability, and speed, and receive instant alerts via email, Slack, Webhooks, SMS, Telegram, and Discord, so you can quickly address any issues. API & WEBSITE MONITORING Monitor your website and APIs to track uptime and response times across 17 global regions. Identify HTTP errors quickly through a user-friendly interface. PUBLIC STATUS PAGES Boost customer trust with real-time transparency. Easily set up a status page to share your website’s uptime status in less than a minute. INCIDENT MANAGEMENT Minimize the time spent on incident management, allowing you to focus on resolving issues quickly to keep your customers satisfied. SSL MONITORING Prevent lost visitors due to expired SSL certificates. Receive timely alerts before your SSL certificate expires, ensuring continuous security. -
38
Speedrank
Speedrank
Say goodbye to slow websites with website optimization powered by Speedrank. Our ongoing web performance monitoring analyzes your sites loading times and creates actionable to‑do lists that increase your page speed. Speedrank helps you identify potential for improvement by automatically creating audits, reporting and sending it to you regularly via email. Speedrank helps you to formulate and prioritize tasks by simply marking them in the dashboard and exporting a meaningful to-do list. Speedrank helps you to document successes by comparing the new reports to the old one after implementing an improvement. Speedrank uses Google's own technology and sees your page as Google sees it. The basis of the Speedrank analyzes is Google Lighthouse, an analysis tool for developers. Lighthouse analyzes web pages on request once and gives extensive, detailed reports. Speedrank analyzes web pages automatically and continuously and translates the technical findings into clear tasks.Starting Price: €9 per month -
39
HTMeLd
Gammadyne Corporation
HTMeLd accelerates your website by eliminating references to external files. It scans your HTML pages to determine what images, style sheets, and scripts that each page depends on. Then it loads those resources and embeds them directly into the page. When a visitor downloads the page, their browser will not need to make additional downloads, the page will display almost instantly. This also improves your Google "Page Experience" score, and therefore your Google rank. There is no easier way to gain competitive advantage in Google search results. We recommend installing the free trial, and performing a before and after test using Google's PageSpeed Insights. Look past the "Discover what your real users are experiencing" section as this is data accumulated for the last month from Chrome users, and will not improve instantly. In the "Diagnose performance issues" section, you should see a large improvement with all speed metrics.Starting Price: $30/month/user -
40
Diffblue Cover
Diffblue
Diffblue Cover analyzes your existing Java program and writes unit regression tests that reflect the current behavior of the code. The CLI tool works 100% autonomously, configuring itself from your Maven or Gradle environment. By bringing automation to the test-writing process, the CLI tool provides a speed boost for organizations that are working towards achieving DevOps goals like CI/CD. Since it fits into a CI pipeline, the CLI tool protects the whole codebase from regressions by shifting testing left. Diffblue Cover's unit regression tests run fast and verify new code changes immediately, helping users detect undesirable changes in the code’s behavior as early as possible, when they're the quickest, easiest, and cheapest to fix. And tests are automatically maintained, saving teams even more time.Starting Price: Free -
41
OpsDash
RapidLoop
OpsDash is fast to set up and easy to use. Get started in minutes with our zero-dependency agent and dashboards pre-configured to include key metrics for server, service and database monitoring. Zero-dependency, single-binary agent-based monitoring of Linux servers. Powered by Golang. Monitor your app metrics without setting up a separate system! Use StatsD and Graphite interfaces to push metrics into OpsDash. Set critical and warning alert thresholds. Notify your team via e-mail, HipChat, Slack, PagerDuty, OpsGenie, VictorOps and Webhooks. Monitor your servers, services, databases, and application metrics with OpsDash. No need to set up multiple systems. See the dashboards and metrics graphs that are important to you all in one place. Get going fast with our expertly designed, pre-configured dashboards. No need to sift through never-ending metrics lists, we’ve done the work for you.Starting Price: $5.00/month -
42
Raygun
Raygun
Spend more time building great software and less time fighting it. Raygun is a cloud-based platform that provides error, crash, and performance monitoring for your web and mobile applications. With Raygun's powerful suite of tools, teams can achieve complete visibility on issues their users encounter, with code-level detail into root causes. Raygun's suite of products covers three main areas (APM, Crash Reporting, and Real User Monitoring), all fully integrated with each other to unlock deeply powerful insights, unlike anything your team has experienced before. Raygun gives you visibility into how users are really experiencing your software. Detect, diagnose, and resolve performance problems faster. Gain unrivalled visibility into server-side performance. Unlock detailed, code-level insights into the root cause of performance issues so you can take action and deliver lightning-fast digital experiences.Starting Price: $4 per month -
43
FAST.com
Netflix
FAST.com speed test gives you an estimate of your current Internet speed. You will generally be able to get this speed from leading Internet services, which use globally distributed servers. Download speed is most relevant for people who are consuming content on the Internet, and we want FAST.com to be a very simple and fast speed test. When you click the “Show more info” button, you can see your upload speed and connection latency (ping). FAST.com provides two different latency measurements for your Internet connection. “unloaded” and “loaded” with traffic. The difference between these two measurements is also called “bufferbloat”. To calculate your Internet speed, FAST.com performs a series of downloads from and uploads to Netflix servers and calculates the maximum speed your Internet connection can provide. FAST.com will test Internet speed globally on any device (phone, laptop, or smart TV with browser). -
44
Radar Website Monitor
Apical Soft
Users will abandon a slow website. According to an experiment by Zona Research, one site studied dropped in abandonment rate from 30% to 8% by improving download time per page by one second faster. Let website monitoring software report your website speed. Radar Website Monitor is a multithreaded website monitoring software that keeps a close and constant watch over your website. It can monitor different types of internet services, including HTTP, HTTPS, SMTP, POP3, FTP, DNS, Ping, Database and TCP. When your website is detected inaccessible, loads improperly or responds excessively slow, Radar Website Monitor will send an immediate notification to you. It can even run previously specified applications automatically! You define the interval of time that Radar Website Monitor provides you with real-time reports and charts, allowing you to easily understand and evaluate your website's performance.Starting Price: $99.95 one-time payment -
45
Super Monitoring
SITEIMPULSE
Website monitoring for all-sized companies: blogs, website, eCommerce stores, web applications. Detecting website outages and malfunctions. Immediate email & SMS alerts. Weekly, monthly & custom reports. Make you aware of the issue and able to react before your users notice anything. Verify the quality of your hosting service. Let you view your malfunction history in Excel, top CMSes or your own app. Minimize your losses during an advertising campaign or launch. Let you create subaccounts for your employees and subcontractors. We check website availability and make sure its features are running properly. We also measure the server’s response time, verify the pages’ content, and check the forms’ results. We test the functioning of entire processes, e.g. making a purchase in an online store. By going through a sequence of steps in accordance with a predefined scenario, we are able to compare the effects with the expected ones.Starting Price: $5.99 per month -
46
PageRadar
PageRadar
PageRadar is a comprehensive SaaS platform for automated website monitoring and SEO health tracking, combining multiple monitoring tools into a unified dashboard. Core Features: Performance Monitoring: Track Google Core Web Vitals (LCP, CLS, FCP, TTFB, INP) with custom threshold alerts powered by Google PageSpeed Insights API. SEO Change Detection: Monitor HTML elements including title tags, meta descriptions, headings, Schema.org markup, and Open Graph tags. Detects Product schema changes (pricing, availability) with intelligent diff analysis and email alerts. Search Rank Tracker: Monitor keyword positions across Google, Bing, and Yandex in 167+ countries. Track SERP features (Featured Snippets, AI Overview) with position threshold alerts. Uptime Monitoring: Track HTTP status codes, SSL certificates, and detect downtime with instant notifications. Affiliate Link Validator: Test affiliate links across 167 countries using geo-targeted proxies.Starting Price: 29$/month -
47
Treo
Treo
Traditional web performance metrics are often technical and don't reflect your customer's journey. Treo is powered by Lighthouse and focuses on user experience metrics to help you to build delightful web experience. Treo shows your site performance like no one else. Use carefully crafted visualizations and understand your data easily. Treo audits your pages in a stable, isolated environment, providing the results you can trust. Get a configurable, world-class infrastructure, that saves your time and covers all your use-cases. Configure CPU power and network throughput using a device that represents your customers. Receive a notification when metrics change or get lower than expected. Choose a location that is closer to your customers. Avoid network latency and geo barriers. Get all the collected data using a simple REST API. Easily integrate Treo to your existing infrastructure. Monitor internal URLs by whitelisting our IP address. Catch bugs before they reach production.Starting Price: $79 per month -
48
FCC Speed Test
SamKnows
Accurately measure the performance of your mobile broadband service by running active tests to evaluate the following metrics, download and upload speed, latency, jitter and packet loss. You can run these tests over both Wi-Fi and cellular connections. The data from these tests contribute to the FCC’s Measuring Broadband America program. The program is run by the FCC to fulfill its Congressional mandate to collect and make publicly available accurate and transparent performance metrics on US broadband. Your privacy is completely safeguarded. No personally identifiable information is collected. You can selectively run manual tests in the app across download speed, upload speed, latency, jitter and packet loss to accurately measure broadband or cellular performance. You can set a monthly data usage cap to ensure tests do not go over the limit. You can also monitor data usage in the app so you do not exceed monthly allowances by your carrier. -
49
SpeedSmart
SpeedSmart
Start Speedsmart with just one touch for the most accurate download, upload, ping and jitter speed test results on your iPhone, iPad, or Android device. Just one more touch to share that result. Your complete speed test history is kept including SSID, location, data usage and more for your review. Use it to see your connection over time or to keep your ISP honest. Your complete speed test history is kept including SSID, location, data usage and more for your review. Use it to see your connection over time or to keep your ISP honest. 100-speed test servers globally for you to speed test. Build sustainable habits that feel invisible. Share your entire speed test history in one tap to CSV. Troubleshoot or verify the speed you were promised. Create tasks with a clear, achievable goal. SpeedSmart provides a real-world internet speed test with a full history and more for your Wi-Fi & cellular connections on your iPhone, iPad or Android device with a beautiful easy-to-use interface. -
50
Logit.io
Logit.io
Logit.io are a centralized logging and metrics management platform that serves hundreds of customers around the world, solving complex problems for FTSE 100, Fortune 500 and fast-growing organizations alike. The Logit.io platform delivers you with a fully customized log and metrics solution based on ELK, Grafana & Open Distro that is scalable, secure and compliant. Using the Logit.io platform simplifies logging and metrics, so that your team gains the insights to deliver the best experience for your customers. Logit.io enables you to monitor and troubleshoot your applications and infrastructure in real-time and enhance your organization's security and compliance. Allow your team to focus on what's important to them, instead of hosting, configuration and upgrading separate open source solutions. Sending your data to the platform is easy, simply use our preconfigured sources to automate the collection of your logs and metrics.Starting Price: From $0.74 per GB per day
