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API checks are monitors that do POST, GET, and other typical HTTP requests. You have full control over the payload, headers, etc. You can also create assertions to check if the response from your API is valid and performant. For billing, we count any HTTP request as a check run. API check runs have a timeout threshold of 30 seconds.

Browser checks are monitors based on Node.js scripts using frameworks like Mocha, Puppeteer, and Playwright. Each browser check uses an actual Chrome browser to execute clicks, fill out forms and validate if these interactions have the correct results. This is also commonly called “synthetic monitoring”. For billing we count every executed script as a check run. Browser check runs have a timeout threshold of 60 seconds.

By signing up for the free trial, you get full access to all of Checkly’s functions. You do not need a credit card to get started. You can execute up to 50,000 API and 5,000 browser check runs. The trial ends either when you have used all available check runs or after 14 days, whichever comes first. After the Free trial, we will automatically convert your account to the Free plan if you haven’t signed up for a Prepaid or Pay-as-you-go Plan.

With a Pay-as-you-go plan, you have maximum flexibility! It is not a subscription model. You can just run your API and browser checks, and we will charge you at the end of the 30-day billing cycle for the check runs you have executed. The unit price per check run is higher than the unit price of Prepaid Plans.

Prepaid Plans are monthly or annual subscriptions that will automatically renew until you cancel your subscription. You can tailor your plan exactly to your needs and freely set the amount of API- and browser check runs. The Prepaid plan comes at a lower unit price than the Pay-as-you-go plan. We continue running your checks when you have exceeded the prepaid volume. These so-called overages will be charged at the Pay-as-you-go unit price. Please note that unused Prepaid check runs won’t roll over to the next billing cycle and will not be credited.

Fair use limits are soft boundaries that apply to certain features. The limits are set in a way that most customers should not encounter any limitations. On a Prepaid or Pay-as-you-go plan, you can invite up to 99 users, have 25 public dashboards, and 200 SMS alerts per month. If you exceed the thresholds, we will reach out and discuss options with you.

For the Free plan or Pay-as-you-go plan upgrades and downgrades don’t apply.

Upgrade Prepaid plan: You can increase the number of committed checks at any time. The changes will apply immediately. The effect will be that the current billing cycle will end, and a new cycle with the higher amount of prepaid runs will start.

Downgrade Prepaid plan: You can reduce the number of Prepaid checks from account settings. The changes will apply after your current subscription cycle automatically.

When you are on a Free plan or Pay-as-you-go plan, you can switch to all plans anytime, and the changes will apply immediately. When you are on a Prepaid plan, you can only change the plan type after the current billing cycle has ended.

Prepaid plans are paid upfront at the beginning of the subscription cycle. Overages will be added to the invoice of the next subscription cycle. Pay-as-you-go check runs will be charged at the end of the billing cycle.

We accept Visa, Mastercard, and American Express credit card payments. Stripe handles all payments. For custom plans, we also accept invoice payments.

Yes! We do support early-stage startups that are younger than two years by providing a 30% discount on all plans. Nonprofits qualify for a 50% discount. Apply here