Alert24 vs Checkly: Unified Incident Platform or Synthetic Monitoring?

Two Tools, Two Different Jobs

Checkly and Alert24 are not direct competitors. They solve different problems, and comparing them head-to-head would be misleading. But teams evaluating their monitoring stack often encounter both, so this post explains where each tool fits and when you might want one, the other, or both.

Checkly is a synthetic monitoring platform. It lets you write Playwright-based browser checks, multi-step API tests, and scripted transaction monitors that run on a global network. It is the best tool in its category for teams that need to verify that login flows work, API responses return the right data, and multi-step user journeys complete successfully. Checkly pioneered the "monitoring as code" approach, where your checks live in your repository alongside your application code.

Alert24 is a unified incident response platform. It combines uptime monitoring (HTTP, DNS, SSL, TCP), on-call scheduling, escalation policies, multi-channel alerting, third-party dependency monitoring, and auto-updating status pages. It does not do synthetic monitoring. It does not run Playwright scripts. It does not validate API response bodies.

These are fundamentally different tools. The question is not "which one should I pick" — it is "which problems do I need to solve?"

Pricing Overview

Checkly uses usage-based pricing tied to check runs:

For most small teams running a reasonable number of browser and API checks, Checkly costs roughly $10-$50/month. Teams with heavy synthetic monitoring needs or large check volumes can spend $250/month or more.

Alert24 uses unit-based pricing. Each unit costs $18/month and includes 15 monitoring checks, a status page, and a team member. A free tier is available with 5 monitors and 1 team member.

These numbers are not apples-to-apples. Alert24 includes incident management, on-call, and status pages. Checkly includes synthetic browser checks and API testing. You are paying for different things.

Feature Comparison

Where Checkly Wins

Synthetic monitoring is not close. Checkly is the best synthetic monitoring tool available. If you need to verify that a user can log in, add an item to a cart, complete a checkout flow, or navigate a multi-step wizard, Checkly does this with Playwright scripts running on a global network. Alert24 does not offer synthetic monitoring at all. This is not a feature gap — it is an entirely different product category.

Monitoring as code. Checkly lets you define your checks in JavaScript or TypeScript files that live in your Git repository. You can version them, review them in PRs, and deploy them through CI/CD pipelines. This is a genuinely better workflow for engineering teams that treat infrastructure as code. Alert24's monitoring is configured through a web UI.

API response validation. Checkly can assert on HTTP status codes, response headers, response body content, and response times. You can write custom assertions in JavaScript. Alert24's HTTP checks verify that an endpoint is reachable and returns the expected status code, but they do not parse or validate response bodies.

Playwright integration. Checkly runs real Chromium browsers using Playwright. If your team already writes Playwright tests, you can reuse those scripts as monitoring checks with minimal changes. This is a powerful developer experience that no other monitoring tool matches.

Multi-location browser checks. Checkly runs browser checks from data centers around the world, so you can verify that user flows work from different geographic locations. This matters for teams with global users and CDN-dependent architectures.

Developer experience. Checkly is built for developers. The CLI, the VS Code extension, the TypeScript-first API, the GitHub integration — everything is designed around how engineering teams already work. It is one of the most polished developer tools in the monitoring space.

Where Alert24 Wins

Incident management and on-call. When something goes down, Alert24 does not just notify you — it creates an incident, pages the on-call engineer through the configured escalation policy, and tracks the incident through resolution. Checkly detects problems and sends alerts, but incident management, on-call scheduling, and escalation are not part of the product. Checkly users typically route alerts to PagerDuty or Opsgenie for that.

Third-party dependency monitoring. Alert24 monitors 2,000+ third-party service status pages — AWS, Stripe, Cloudflare, GitHub, Twilio, and more — and alerts you when a dependency has issues. If your production incident is actually caused by an AWS outage, Alert24 tells you before your team spends 30 minutes debugging your own code. Checkly does not offer this.

Auto-updating status pages. Alert24 includes public status pages that update automatically when monitoring detects an issue. Your customers know something is wrong before they flood your support inbox. Checkly does not include status pages.

Postmortem workflows. After an incident is resolved, Alert24 provides built-in postmortem workflows with action items, metrics, and publishable summaries. This closes the loop on the incident lifecycle. Checkly does not handle post-incident processes.

Full incident lifecycle in one tool. With Alert24, the workflow is: monitor detects a problem, incident is created, on-call engineer is paged via SMS/voice/Slack, status page updates automatically, incident is resolved, postmortem is written. That entire lifecycle lives in a single platform. With Checkly, you get the detection piece — but you need PagerDuty or Opsgenie for on-call, and Statuspage or Instatus for customer communication.

Simpler pricing for the full stack. If your team needs monitoring plus incident management plus status pages, Alert24's $18/unit/month covers all three. With Checkly, you still need to add an incident management tool ($21+/user/month for PagerDuty) and a status page tool ($29+/month for Statuspage). The total cost adds up quickly.

What Alert24 Cannot Do (and Should Not Claim To)

To be direct about the gaps:

• No synthetic monitoring. Alert24 does not run browser-based transaction checks. If you need to verify that a multi-step user flow works end-to-end, you need a tool like Checkly.
• No Playwright integration. There is no way to run Playwright scripts as monitoring checks in Alert24.
• No monitoring as code. Alert24's checks are configured through the web UI, not through code files in your repository.
• No API response validation. Alert24 checks whether an endpoint is up and returns the expected status code. It does not parse response bodies or let you write custom assertions.
• No multi-step API checks. Checkly can chain API calls together — use the response from one request as input to the next. Alert24's monitoring checks are independent.

These are not features on an upcoming roadmap. They reflect a fundamental difference in what the two products are designed to do.

The Case for Using Both

Many teams use Checkly and an incident management platform together. Checkly detects that something is broken. The incident management tool handles the response.

Here is how Alert24 and Checkly work together:

1. Checkly monitors critical user flows — login, checkout, API endpoints that need response validation.
2. Alert24 monitors uptime — HTTP, DNS, SSL, and TCP checks for all your services and dependencies.
3. Checkly routes alerts to Alert24 — when a Checkly check fails, it triggers an Alert24 incident via webhook.
4. Alert24 handles the response — on-call engineer is paged, escalation policy kicks in, status page updates automatically.
5. Alert24 tracks the incident — severity levels, timeline, resolution, postmortem.

This gives you best-in-class synthetic monitoring (Checkly) combined with best-in-class incident response (Alert24) for less than what most teams pay for PagerDuty alone.

Who Should Choose Checkly (Without Alert24)

• Teams that already have an incident management tool (PagerDuty, Opsgenie, etc.) and need to add synthetic monitoring to their stack.
• Developer-heavy teams that want monitoring as code and Playwright-based checks integrated into their CI/CD pipeline.
• Teams whose primary concern is application correctness, not just availability. If you need to know that the checkout flow works, not just that the server responds to pings, Checkly is the right tool.
• Teams that do not need status pages or on-call scheduling. If your incident response is handled elsewhere, Checkly is a focused, excellent synthetic monitoring tool.

Who Should Choose Alert24 (Without Checkly)

• Startups and SMBs that need monitoring, incident management, on-call scheduling, and status pages in a single tool without stitching together four separate services.
• Teams where uptime monitoring is sufficient. If knowing that your endpoints are reachable and responding with the correct status code covers your monitoring needs, you do not need synthetic browser checks.
• Teams that want auto-updating status pages tied directly to monitoring data, without manual intervention during incidents.
• Budget-conscious teams that cannot justify separate bills for monitoring, incident management, and status pages. Alert24 at $90/month for a 5-person team replaces what would otherwise be $150-250/month across multiple tools.

Who Should Use Both

• Teams that need synthetic monitoring AND incident management. Use Checkly for browser and API checks. Use Alert24 for uptime monitoring, on-call, escalation, and status pages. Route Checkly alerts into Alert24 via webhooks.
• Teams replacing a PagerDuty + monitoring + Statuspage stack that also need synthetic checks. Alert24 replaces three tools; Checkly adds the synthetic layer.
• Teams with critical user-facing flows (e-commerce checkout, authentication, payment processing) that also need dependency monitoring and customer-facing status pages.

The Bottom Line

Checkly is the best synthetic monitoring tool on the market. If you need Playwright-based browser checks, multi-step API tests, or monitoring as code, Checkly is the right choice. Alert24 does not compete in this category and does not try to.

Alert24 is a unified incident response platform. If you need uptime monitoring, on-call scheduling, escalation policies, dependency monitoring, and auto-updating status pages in a single tool, Alert24 covers the full incident lifecycle at a fraction of the cost of stitching together separate tools.

For many teams, the right answer is both. Checkly for synthetic monitoring. Alert24 for everything else. The two tools complement each other well, and together they cost less than most enterprise incident management stacks.

Ready to see if Alert24 fits your team? Start a free trial -- no credit card required. Set up monitoring, on-call scheduling, and a status page in under 10 minutes.