Checkly

Checkly operates a software-as-a-service platform that combines synthetic monitoring, end-to-end testing and incident communication for software engineering teams. Customers define uptime monitors, API checks, multistep API checks, browser checks and Playwright check suites, and heartbeat monitors, then deploy them from code using the Checkly CLI, TypeScript/JavaScript constructs, Terraform or Pulumi. Checks execute from public data center locations (22 public locations on higher tiers, including N. Virginia, N. California, Frankfurt, London, Singapore, Sydney on entry tiers, plus regions such as Ireland, Mumbai, Tokyo, São Paulo and Cape Town) and from private locations inside customer infrastructure on higher plans. Supported uptime protocols include HTTPS, TCP, DNS, ICMP, SSL/TLS, gRPC, Traceroute and Heartbeat.

The product is organized around three stages: Detect (multi-layer global monitoring), Communicate (alerting through email, Slack, SMS, phone, webhooks and incident-management integrations such as PagerDuty, OpsGenie, Incident.io and Rootly, plus status pages and dashboards) and Resolve (distributed OpenTelemetry tracing via Checkly Traces, AI-assisted insights and performance analysis). As of the current site, Checkly positions itself as an "active reliability layer for developers and agents," with an AI-native workflow in which coding agents (for example Claude Code) can generate, deploy and respond to monitors; the company publishes a Checkly plugin providing Monitoring-as-Code skills for agents.

Checkly maintains a substantial open-source presence on GitHub (77 public repositories), including the Checkly CLI, a Terraform provider, a Go SDK, Helm charts and a GitHub Action. The platform is delivered from AWS and Vercel, with primary data storage in AWS eu-west-1 (Ireland); the company states it is GDPR compliant and SOC 2 Type 2 compliant, uses Auth0 for authentication and Stripe for payments, and operates a public security-response (white hat) program.

Founding story

According to a third-party directory profile, Checkly was founded by Hannes Lenke (CEO), Tim Nolet (Chief Evangelist) and Timo Euteneuer (COO), all with prior experience in software development, web monitoring and observability. The same source gives a founding year of 2018 in its quick facts while noting 2020 elsewhere, and attributes the concept to the founders' earlier monitoring work, including a 2010 project acquired in 2016.

Business model

Subscription SaaS sold directly to engineering teams, with usage-based components. Published tiers are Hobby (free), Starter ($24/month), Team ($64/month) and a custom-priced Enterprise plan, billed monthly or annually with up to 20% annual discount. Plans bundle allowances of uptime monitors, browser/Playwright check runs and API check runs, with add-on blocks (e.g. 25 additional monitors for $8) and overage pricing (e.g. $6.50 or $6.25 per 1k browser check runs; $2.60 or $2.50 per 10k API check runs). Higher tiers unlock more locations, private locations, faster frequencies, visual regression testing, maintenance windows and additional alert channels.

Recurring subscription fees per plan tier plus paid add-ons and usage overages for check runs and monitors; Enterprise contracts are custom-quoted. A third-party directory estimates annual revenue of approximately $6.7 million.

Traction

More than 1,000 customer companies and thousands of daily developer users running millions of checks per day as of the Series B announcement; a third-party profile cites approximately 40,000 developers, 32.5 million checks daily and 3x growth in enterprise adoption. Open-source repositories show ongoing activity, with the Checkly CLI at 97 GitHub stars and the Terraform provider at 44 stars, and commits recorded through August 2026.

Latest developments

The current website presents Checkly as an "active reliability layer for developers and agents," with AI-native creation of tests, monitors, alerts and status pages, agent integrations (e.g. Claude Code) that can create monitors and respond to incidents, and Playwright-based checks deployed to 20+ locations. GitHub activity through mid-2026 includes a checkly-plugin repository offering Monitoring-as-Code skills for agents, a Playwright trace viewer fork, and continued CLI, Terraform provider and Go SDK development.