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Uptime.com provides 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. | Checkly is the API & E2E monitoring platform for the modern stack: programmable, flexible and loving JavaScript. Free for developers! |
Receive comprehensive domain monitoring at one minute intervals from locations worldwide; Alerting - Receive real-time downtime alerts via email, SMS and third party push notifications; Page Speed Monitoring - Identify performance bottlenecks through complete insights on your website’s performance; Transaction Monitoring - Simulate visitor interaction with your site automatically and get alerted when critical site flows stop working correctly; Real User Monitoring - Optimize the experience of actual users on your website leveraging detailed analytics, trends, and page load time analysis; Domain Health - Get data on critical domain issues including data on DNS, Web Server, Mail Server and Blacklists; Status Page - Utilize your status page for summarizing metrics on multiple checks for internal reporting or public display uptime. | Deep & flexible uptime and performance monitoring for API's and Web Apps;
Full HTTP request editor for headers, params, body etc;
Environment variables, encrypted for secrets;
Basic Auth, OAuth 1.0, OAuth 2.0, HMAC support;
Flexible Node.js based setup & teardown scripts;
Site transaction monitoring - full scripting support with Puppeteer & Playwright;
Runs in actual Chrome browsers in the cloud;
Take screenshots and asserts page items;
Email, Slack, Webhooks, Pagerduty, OpsGenie, Discord and SMS notifcations;
Prometheus exporting;
Triggers checks from CI/CD;
SSL certificate expiry checks;
Public dashboards with custom CNAME domain
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The world’s best software and DevOps teams rely on New Relic to move faster, make better decisions and create best-in-class digital experiences. If you run software, you need to run New Relic. More than 50% of the Fortune 100 do too.

It is the only complete API development environment, used by nearly five million developers and more than 100,000 companies worldwide.

Datadog is the leading service for cloud-scale monitoring. It is used by IT, operations, and development teams who build and operate applications that run on dynamic or hybrid cloud infrastructure. Start monitoring in minutes with Datadog!

Pingdom is an uptime monitoring service. When problems happen with a site that Pingdom monitors, it immediately alerts the owner so the problem can be taken care of.

Better Stack is a radically better infrastructure monitoring platform that calls the right person on your team if anything goes wrong. Schedule on-call duties, receive helpful alerts, and collaborate on solving incidents faster than ever.

Raygun gives you a window into how users are really experiencing your software applications. Detect, diagnose and resolve issues that are affecting end users with greater speed and accuracy.

Paw is a full-featured and beautifully designed Mac app that makes interaction with REST services delightful. Either you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.

AppSignal gives you and your team alerts and detailed metrics about your Ruby, Node.js or Elixir application. Sensible pricing, no aggressive sales & support by developers.

Combines API test-automation, mocks and performance-testing into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Besides powerful JSON & XML assertions, you can run tests in parallel for speed - which is critical for HTTP API testing.

It is all about helping you to keep your websites up. It monitors your websites every 5 minutes and alerts you if your sites are down.