23 Best Synthetic Monitoring Tools

What happens if a website visitor is unable to sign up on your web app or even check out during a purchase? They’re likely to look for another solution, which is a competitor. Users are usually the first to notice when your website breaks or slows down. I’ve seen how even a few minutes of downtime or a failed checkout flow can lead to lost revenue and frustrated users. This is exactly where synthetic monitoring tools come in.

Synthetic monitoring lets you simulate user interactions such as loading pages, logging in, or completing transactions. Unlike basic website or uptime monitoring tools, which only check whether your site is online, synthetic monitoring goes deeper by testing how your application actually performs. Moreover, unlike Real User Monitoring (RUM), which tracks real visitors, synthetic tests run continuously even when no users are active.

Our Geekflare team has reviewed various tools to present you with the best synthetic monitoring options. I’ve grouped them based on different needs:

• For Startups & SMBs
• Enterprise teams
• Technical teams wanting free/open-source options

Synthetic Monitoring Tools for SMBs & Startups

Most small businesses and startups don’t have large budgets or big DevOps teams to always monitor their websites. As such, they rely on synthetic tools that are affordable, easy to set up, and effective enough to detect issues before real users encounter them. The following are some affordable, easy-to-deploy synthetic monitoring tools suitable for growing businesses and startups.

Checkly

Best for Code-First Testing

Checkly is a code-based monitoring tool that you can configure with Playwright, Terraform, or its CLI. This tool allows developers to configure the entire workflow to run end-to-end tests or monitor uptime without manual intervention. With Checkly, you can monitor user flows, transactions, and content from real browsers spread across its global infrastructure. 

You don’t have to create everything from scratch each time you run synthetic monitoring. Write these scripts once and reuse them as many times as you want to continuously monitor and validate Cron Jobs, UI, and APIs. You can write your tests in JavaScript or TypeScript. 

Checkly gives timely reports when a synthetic monitoring check fails. You can configure it to send instant alerts via Slack, SMS, email, or PagerDuty. The tool also offers TCP and heartbeat monitoring to ensure that backend services and scheduled jobs run on time and to send timely notifications if they don’t.

Site24X7

Monitor Pages Behind Login

Site24X7 by ManageEngine is a tool you can use to assess front-end performance and record all your transactions on a web application. This tool simulates user interactions on real Chrome, Firefox, and Edge browsers to verify the availability and performance of web transactions. It also lets you understand how users are interacting with your application. 

You don’t need to be a developer to use Site24X7, as it includes an easy-to-use no-code recorder. You can always play back all recorded transactions in a real browser and even obtain a step-by-step analysis of how users interact with your application. Edit and tweak the transaction scripts easily in case you’re not satisfied with the monitoring progress. 

Site24X7 produces exhaustive reports you can share with stakeholders. The tool offers scripts that simulate various user scenarios, such as searching for products, logging in, or making a purchase. It executes these scripts across various global locations and records key performance indicators, such as throughput, response time, and error rates.

ManageEngine has another self-hosted product, Application Manager, suitable for growing businesses and those seeking a tool that they can host internally. With it, you can monitor multiple URLs and URL sequences, as well as the availability of web apps from different locations. You can run the tool in your data center while deploying several EUM agents across different geographic locations. However, all these will report the application’s performance data to a central tool. 

Sematext

Best for Budget-Friendly Monitoring

Sematext is a synthetic monitoring tool for web applications and APIs. The tool simulates user interactions and requests from both private and public locations, allowing website owners to detect issues early, before they affect end users. You can also use Sematext to test internal systems, such as web applications and APIs that are inaccessible from the public internet.

Sematext simulates real user interactions, such as form submissions, e-commerce transactions, and clicks. You can then integrate browser-based synthetic tests with your preferred CI/CD tools and catch performance issues early enough before they affect end users. This ensures that you validate checkout processes and login flows before deployment. 

Sematext offers proactive alerting and issue detection, identifying critical incidents and sending instant notifications. You configure alert rules to monitor availability, error rates, or performance thresholds and receive notifications via webhooks, email, Slack, or PagerDuty. Sematext also provides a unified interface that displays synthetic test results, logs, events, and metrics for easier troubleshooting. 

Uptrends

Best for Global Transaction Testing (230+ Locations) 

Uptrends Synthetics is a performance, functionality, and user interaction monitoring tool for web applications and APIs. This tool has over 230+ global checkpoints to record transactions such as shopping baskets, form submissions, and logins. Uptrends alerts website owners instantly when any problems arise and sometimes sends screenshots to let them know the exact issue. 

Uptrends’ Transaction Recorder records all the critical transactions, such as sign-ups and logins, directly in a browser. You can use the visual editor to build and edit scripts that fit your workflows. Uptrends records transactions every 5 minutes on the free plan, ensuring that users can access and transact on your website at any time. 

Uptrends offers private checkpoints for your APIs. Its custom scripting and advanced response parsing features provide the flexibility needed to simulate real-world API scenarios. You can define custom limits that identify performance issues before they affect end users of these APIs. Uptrends performs multi-step API checks, ensuring you get a complete picture of what is impacting user experience. 

Pingdom

Best for Transaction Testing and Performance Analysis

SolarWinds Pingdom Synthetic Monitoring simulates visitor interactions on web applications and immediately alerts owners when a critical site flow is broken, the website is slow, or the website is unavailable. The transaction monitoring feature checks for transactions such as checkouts, searches, and logins to ensure that end users can always transact on your website. 

Pingdom Synthetic Monitoring monitors both simple and complex transactions, such as shopping-cart checkouts, new-user registrations, and URL hijacking. You don’t need any coding knowledge, as the tool records site interaction flows with a few clicks. You can also write your own script using the built-in editor that will suggest all the validations and steps you should take. 

Pingdom implements its synthetic monitoring on a real Chrome browser. The tests run frequently, as you can set them to run every 5 minutes or once per day on probe servers across the globe. 

DebugBear

Best for Lighthouse Audit

DebugBear’s synthetic monitoring tool conducts front-end performance tests by running entire pages in the browser. It focuses on user-centric metrics, tracking indicators such as Google’s Core Web Vitals to determine how quickly your page responds to visitors. DebugBear ensures you get accurate results by measuring your website’s performance across over 30 global locations. 

DebugBear is big on reporting, as users can see exactly what happens when a page loads and identify what might hold back rendering. It also has a built-in Lighthouse feature where every report includes a detailed analysis from Google’s Lighthouse tool showing performance, accessibility, and SEO stats. You also get tailored recommendations for improving user experience and speed. 

DebugBear allows users to do page speed experiments and optimize their websites without deploying code. This means you can tweak your code until you’re satisfied and only deploy when you hit satisfactory levels. Get alerted via Slack, Teams, or email when DebugBear detects significant changes in your web application so you can act accordingly. 

New Relic 

Best for Full-Stack Observability

New Relic’s synthetic monitoring tool simulates user journeys on web applications throughout the application lifecycle to protect your customers from outages that affect transactions. The tool proactively checks for and detects low-performing entities, such as APIs, URLs, and web services, and sends alerts so their owners can act before end users are impacted. 

New Relic provides end-to-end monitoring to help troubleshoot across your stack. It provides detailed reports showing endpoint failures, so you can determine whether the issues stem from backend services, cloud service outages (e.g., AWS), or third-party resources. New Relic also shows all the dependencies that affect synthetic tests.  

New Relic simulates users across different OSes, devices, and browsers to identify underperforming areas. It also tests traffic across thousands of private and public locations, making it easy to catch errors early before shipping applications. 

Betterstack

Best for Simple Uptime Monitoring and Phone Alerts

Betterstack’s uptime monitoring tool has a full-fledged JavaScript runtime that monitors all transactions to ensure effective user interactions. The tool records all error messages from your API or website and takes a screenshot, so you know exactly what happened and when. Its edge-based traceroute and MTR outputs help you understand request and connection outputs and how they affect performance. 

Betterstack uses Playwright Codegen, which lets users create scripts without writing code by walking through the user flow in their browser. Such users can save these Playwright scripts and reuse them for other checks within the same user dashboard. Betterstack’s all-you-can-alert package gives you access to voice calls, push, SMS, Teams, email, and Slack notifications in case of any incident. 

Other Synthetic Monitoring Tools for SMBs & Startups

Here are other synthetic monitoring tools for SMBs & startups that didn’t make in to our main list but deserve honorable mentions:

#9

Dash0’s Synthetic Monitor

Dash0’s synthetic monitoring tool simulates user behavior from different access points distributed across the globe to catch errors before they affect end users. Get instant alerts PagerDuty, Slack or custom webhooks and act before things get out of hand

#10

SpeedCurve

SpeedCurve offers comprehensive web performance monitoring by collecting various web performance metrics into one place. It allows users to run A/B tests to determine areas of performance improvements

#11

Apica Vanguard

Apica Vanguard performs synthentic checks that simulate real user and agent workflows to catch errors before they affect end users. It is available as cloud, hybrid and on prem options.

#12

Dotcom-Monitor synthetic monitoring

Dotcom-Monitor synthetic monitoring creates tests that detect broken user journeys, performance issues and silent failures. It tests websites, applications and APIs from over 30 global locations where users get instant diagnostics from real browsers.

#13

Uptime Synthetic Transaction Monitoring

Uptime Synthetic Transaction Monitoring continuously tests the functionality, performance and availability of your website's critical user journeys. It comes with a built-in editor with field suggestions to help you create tests.

Enterprise Synthetic Monitoring Tools

Enterprise synthetic monitoring tools are well-suited to large-scale, complex systems where performance, reliability, and uptime are critical. They support global testing locations, high-frequency checks, and multi-step user simulations. These are some of the best:

Datadog 

Best for AI-Powered Synthetic and RUM Integration

Datadog Synthetic Monitoring is an enterprise tool for detecting user-facing issues and sending alerts before they impact end users. It has a fully hosted, codeless web recorder that allows users to create tests with performance minimums to ensure smooth transactions at all times. Datadog automatically detects UI changes and updates tests to reduce false alarms. 

Datadog offers full application-to-network visibility, enabling users to uncover the root causes of transaction failures. The Datadog agent tests real-world conditions and transactions from globally managed locations to ensure you get realistic results. You can thus determine if the failures stem from the application itself or from the network. 

Datadog provides one suite for all your testing needs. You can detect issues early, prevent them, and create remedies by incorporating end-to-end tests into your CI pipelines and integrating seamlessly with CircleCI, Azure DevOps, GitHub, GitLab, and Jenkins. You can also integrate Datadog with collaboration tools such as Jira and Slack to avoid context switching and streamline workflows. 

Catchpoint 

Best for Global Coverage with 350+ Locations Coverage

Catchpoint offers a suite of synthetic and internet synthetic monitoring tools that let users emulate actual end-user behavior and perform API and web tests from cloud locations. It has a large observability network that monitors various connection types such as edge, backbone, last-mile, and multi-access edge. This ensures you measure the reliability and performance of your end user’s experience. 

Catchpoint allows users to simulate failover exercises and see the impact of these changes on user experience. You can also use Playwright and Puppeteer to automate simulations and catch errors before they affect end users. You can write scripts from scratch or customize the available ones to fit your synthetic monitoring goals. 

Catchpoint sends you real-time alerts via PagerDuty, Slack, or any other available integration when key performance metrics fall below average or exceed the agreed-upon threshold. It also delivers comprehensive reports, enabling you to determine the root cause of the outage and take appropriate action. 

Grafana Cloud 

Best for Testing Different Network Levels

Grafana Cloud Synthetic Monitoring tests critical web journeys and the performance of APIs and web applications. This tool compares results with metrics, logs, and traces in Grafana Cloud to help users determine the root cause of failures in user journeys. It also tests different network levels, such as HTTP, HTTPS, TCP, DNS, and Ping, to verify system performance.  

Grafana Cloud Synthetic Monitoring features monitoring agents (probes) distributed across global locations to simulate user traffic from those locations. These agents periodically send requests to predefined URLs to measure performance and verify expected outcomes. Users can visualize these tests and alerts on the Grafana Cloud. 

Users define tests and synthetic tests using JavaScript and the k6 API. Write your scripts just once and reuse them in your entire software development lifecycle. Use Terraform or Grafana’s API to automatically maintain and deploy checks. You can also store all the monitoring resources in your GitHub repo alongside your code. 

Other Enterprise Synthetic Monitoring Solutions

Here are some more enterprise synthetic tools that don’t appear on our main list.

#17

Splunk's Synthetic Monitoring

Splunk's Synthetic Monitoring tool helps users to proactively find and fix performance issues across business transactions, user flows, and APIs. You can visualize customer experience by measuring how new code versions impact customer experience with video playbacks.

#18

Dynatrace

Dynatrace focuses on delivering flawless digital experiences with real-user and synthetic monitoring and session replays. It sends instant alerts when availability is at risk or when performance goes below agreed-upon thresholds.

Open-Source & Free Synthetic Monitoring Solutions

Open-source and free synthetic monitoring tools are ideal if you want full control, customization, and zero licensing costs. They give users flexibility, self-hosting, and the ability to tailor monitoring to their exact workflows and infrastructure.

Uptime Kuma 

Uptime Kuma is a free and open-source synthetic monitoring tool for websites and complex environments such as game servers, SQL databases, and Docker containers. This tool presents the collected data in beautiful visual charts you can use to make decisions. It also has one of the largest collections of alert channels, with 95+ modes to choose from. 

Uptime Kuma ensures you never miss issues on your website, with 20-second monitoring intervals. You can also host multiple status pages on your website to ensure that you alert your end users of any outages affecting transactions. Uptime Kuma is available in over 20 languages, ensuring that you can configure monitoring checks in a language you’re conversant with. 

OpenStatus

OpenStatus is an open-source uptime monitoring and status page creating tool that helps users monitor APIs and websites from 28 regions. This tool uses multiple cloud providers, such as Fly.io, Koyeb, and Railway, ensuring you always get accurate results even if one provider is temporarily unavailable. OpenStatus allows users to monitor various HTTP/HTTPS endpoints such as webhooks, GraphQL APIs, and REST APIs. 

OpenStatus is quite flexible, as you can set a “degraded at” or “timeout” threshold, and it automatically sends you an alert whenever responses exceed the set thresholds. You can always monitor changes through the OpenStatus CLI and its YAML config. You can even monitor services that aren’t available to the public by deploying OpenStatus’ probes to your favorite cloud provider. 

OneUptime

OneUptime offers real-time monitoring of containers, servers, APIs, and websites from 7 global locations. This open-source tool allows you to set check intervals, custom success criteria, and test locations. You can then set notification alerts from the available channels and get detailed performance insights to help you act accordingly. 

OneUptime provides both public (websites and front-facing APIs) and private monitoring. For the latter, you can monitor air-gapped environments, VPNs, and private networks. This makes it easy to monitor internal databases, infrastructure, and services that are inaccessible from the public internet. Lastly, OneUptime monitors your endpoints every second, ensuring it catches errors early before they hit production.

Other Open-Source and Free Synthetic Monitoring Solutions

Here are other open-source and free synthetic monitoring solutions that don’t appear on our main list:

#22

Zabbix

Zabbix's synthetic monitor allows users to define flexible multi-step browser based scenarios to monitor web applications and APIs. The tool captures screenshots of the current state of your web application, analyzes the collected data and sends alerts if any issues are noted.

#23

Icinga

Icinga is an open-source tool for handling synthetic web application requests. The tool simulates end-user interactions such as placing orders, browsing pages and submitting forms and sends alerts in case there are any abnormalities.

Best Synthetic Monitoring Tools Comparison

Synthetic Monitoring vs. Real User Monitoring (RUM)

Synthetic Monitoring and Real User Monitoring (RUM) both help you understand application performance, but they work very differently. The key difference is that synthetic monitoring simulates user behavior, while RUM tracks actual user interactions in real time.

What Synthetic Monitoring Tracks

Synthetic monitoring uses scripted tests to simulate user journeys like logging in, searching, or completing a checkout. These tests run continuously from different locations, even when no users are on your site. This means you can detect downtime before users notice, test critical flows such as sign-ups and payments, and monitor performance across global regions.

Use case: If you run an e-commerce store, synthetic monitoring can simulate a full checkout process every few minutes. If the payment step fails, you’ll know immediately, before you lose real customers.

What Real User Monitoring (RUM) Tracks

RUM collects data from actual users as they interact with your application. It tracks real metrics like page load times, device types, browser performance, and geographic user experience.

This helps you understand real user experience across devices, identify slow pages affecting actual visitors, and analyze performance trends based on real traffic

Use case: If users in a specific region, for instance, Asia, experience slow load times, RUM will highlight that issue based on real traffic data, helping you optimize CDN or server distribution.