CronPeek vs Checkly: Cron Job Monitoring for Developers Compared

Checkly and CronPeek both offer cron monitoring, but they serve fundamentally different purposes. Checkly is a synthetic monitoring platform built around Playwright browser checks and API monitoring—cron monitoring is a secondary feature via Heartbeat checks. CronPeek is a purpose-built dead man's switch for cron jobs. Here's an honest look at how they compare, what each does best, and which one makes sense for your use case.

Two Tools, Two Different Jobs

If you're searching for "Checkly cron monitoring," you've probably already noticed that Checkly doesn't lead with cron monitoring in its marketing. That's because it's not their primary product. Checkly is a Monitoring as Code platform built for testing websites and APIs from multiple global locations. Their Heartbeat checks—the feature that handles cron monitoring—were added later to complement their core synthetic monitoring product.

CronPeek, on the other hand, does exactly one thing: monitor your scheduled tasks. No browser checks. No API uptime monitoring. No Playwright test runners. Just dead man's switch ping monitoring with fast alerts when your cron jobs stop running.

Both approaches have merit. The right choice depends on what you actually need.

What Checkly Does

Checkly is a developer-focused synthetic monitoring platform. It runs automated checks against your applications from data centers around the world and alerts you when things break. Their core features include:

• Browser checks — Playwright-based end-to-end tests that run on a schedule. Log into your app, click through a checkout flow, verify a dashboard loads—real browser automation at monitoring scale.
• API checks — HTTP request monitoring with assertions on status codes, response bodies, latency, and headers. Run from 20+ global locations.
• Monitoring as Code (MaC) — Define your checks in JavaScript or TypeScript and manage them via the Checkly CLI. Version control your monitoring configuration alongside your application code.
• Playwright Test integration — Use your existing Playwright test suite as monitoring checks. Write once, test locally, monitor in production.
• Heartbeat checks — Dead man's switch monitoring for cron jobs and scheduled tasks. Your job pings a Checkly URL, and you get alerted if the ping doesn't arrive.
• Terraform provider — Manage Checkly resources via Terraform for infrastructure-as-code workflows.

Checkly's strengths

Checkly is genuinely good at what it's designed for. The Playwright integration is best-in-class—if you're already writing Playwright tests, turning them into production monitors is seamless. The Monitoring as Code approach resonates with infrastructure-minded teams who want their monitoring config in Git, not in a web dashboard. The Terraform provider is a real differentiator for teams managing infrastructure declaratively.

For synthetic monitoring specifically, Checkly is one of the best tools available in 2026.

The cron monitoring story

Checkly's Heartbeat checks work the way you'd expect. You create a Heartbeat check in the dashboard or CLI, get a unique ping URL, add a curl call to your cron job, and Checkly alerts you if the ping doesn't arrive within your configured interval. It functions correctly.

The limitation isn't functionality—it's focus. Heartbeat checks are one feature among many in a platform primarily designed for browser and API monitoring. The pricing reflects this: you're paying for a synthetic monitoring platform, and cron monitoring rides along. If you need 50 cron monitors and zero browser checks, you're paying for capacity you won't use.

What CronPeek Does

CronPeek is a purpose-built dead man's switch for cron jobs and scheduled tasks. There's no browser testing, no API uptime monitoring, and no Playwright integration. CronPeek does one thing:

1. You create a monitor with an expected interval (e.g., every hour, every day)
2. Your cron job pings CronPeek's API on successful completion
3. If the ping doesn't arrive within the interval plus a grace period, you get alerted

That's it. No agents to install. No JavaScript test files to write. No CLI toolchain to learn. One API call to create a monitor, one curl in your crontab.

# Create a monitor
curl -X POST https://cronpeek.web.app/api/v1/monitors \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name": "Nightly Backup", "interval": 86400, "grace": 900}'

# Add to your crontab
0 2 * * * /scripts/backup.sh && curl -fsS --retry 3 https://cronpeek.web.app/api/v1/ping/MON_ID

CronPeek's advantage is simplicity and cost. When all you need is "alert me when my cron job didn't run," a focused tool eliminates the overhead of a broader monitoring platform.

Feature Comparison

Here's a direct comparison focused on cron monitoring capabilities as of March 2026:

Pricing Deep Dive

Pricing is where the difference between a focused tool and a platform becomes most visible.

Checkly pricing

Checkly's pricing is structured around their core product: synthetic monitoring. The Team plan starts at $30/month and includes a bundle of browser check runs, API check runs, and Heartbeat checks. Key details:

• Team plan: $30/month — includes 10 browser check runs, API check runs, and a limited number of Heartbeat checks
• Scaling: additional checks and Heartbeat monitors cost extra based on usage tiers
• Enterprise: custom pricing for high-volume needs
• Heartbeat checks (cron monitoring) are included in plans but are part of the overall check allocation, not priced independently

If you need 50 cron monitors and also use browser checks and API monitoring, Checkly's bundled pricing makes sense. If you only need cron monitors, you're paying $30+/month for a platform where you'll use one feature.

CronPeek pricing

• Free: 5 monitors, email alerts
• Starter: $9/month — 50 monitors, email + webhook alerts
• Pro: $29/month — unlimited monitors, priority alerts, webhook + Slack integration

No per-check pricing. No usage tiers. No browser check bundles inflating the cost. Just flat-rate cron monitoring.

The math for cron-only monitoring

If you're monitoring 50 cron jobs and don't need browser checks or API monitoring:

• Checkly: $30+/month ($360+/year)
• CronPeek: $9/month ($108/year)
• Savings: $252+/year with CronPeek

That's a 3.3x cost difference at minimum. For teams with unlimited cron jobs, CronPeek's $29/month Pro plan costs less than Checkly's entry-level Team plan while offering unlimited monitors.

When to Choose Checkly

Checkly is the right choice when cron monitoring is part of a broader synthetic monitoring strategy. Specifically:

• You need browser testing in production — you want Playwright scripts running against your app every 5 minutes to catch regressions before users report them
• You need API uptime monitoring from multiple locations — you want to verify your API responds correctly from data centers in the US, Europe, and Asia
• You practice Monitoring as Code — your team manages infrastructure declaratively and wants monitoring config in Git, deployed via CI/CD
• You use Terraform — Checkly's Terraform provider lets you manage monitors alongside your infrastructure code
• Budget isn't a primary concern — you're comfortable paying $30+/month because you're using browser checks, API checks, and Heartbeat checks together
• You want one platform — consolidating synthetic monitoring and cron monitoring into a single tool with unified alerting is worth the premium

If you're already using Checkly for browser and API monitoring, adding Heartbeat checks for your cron jobs is a no-brainer. The marginal cost is justified, and you get unified alerting and dashboards.

When to Choose CronPeek

CronPeek is the right choice when you need dedicated cron monitoring without a broader synthetic monitoring platform:

• You only need cron job monitoring — no browser checks, no API uptime monitoring, just "did my scheduled task run?"
• You want the cheapest reliable option — $9/month for 50 monitors beats every general-purpose monitoring platform on price for cron-specific monitoring
• You have 10+ cron jobs — the cost savings compound with every monitor; at 50+ jobs, CronPeek saves $250+ per year versus Checkly
• You want the fastest possible setup — one API call to create a monitor, one curl in your crontab. No CLI toolchain, no JavaScript config files, no Terraform modules
• You're a solo developer or small team — you don't need enterprise features like Monitoring as Code or multi-location API probes; you need to know when your backup script stops working
• You use Checkly for other things — many teams use Checkly for browser/API monitoring and CronPeek specifically for cron jobs, getting best-in-class tools for each use case at a lower combined cost

API Comparison: Creating a Cron Monitor

Let's compare how each tool handles creating a new cron monitor programmatically.

CronPeek API

# Create a monitor that expects a ping every 24 hours
# with a 15-minute grace period

curl -X POST https://cronpeek.web.app/api/v1/monitors \
  -H "Authorization: Bearer cpk_live_abc123" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Nightly DB Backup",
    "interval": 86400,
    "grace": 900
  }'

# Response:
# {
#   "id": "mon_x7k9m2",
#   "ping_url": "https://cronpeek.web.app/api/v1/ping/mon_x7k9m2",
#   "status": "new",
#   "name": "Nightly DB Backup",
#   "interval": 86400,
#   "grace": 900
# }

# Ping from your cron job:
curl -fsS https://cronpeek.web.app/api/v1/ping/mon_x7k9m2

Three fields to create a monitor. One URL to ping. Done.

Checkly API

# Create a Heartbeat check in Checkly

curl -X POST https://api.checklyhq.com/v1/heartbeats \
  -H "Authorization: Bearer chu_abc123" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Nightly DB Backup",
    "period": 1440,
    "periodUnit": "minutes",
    "grace": 15,
    "graceUnit": "minutes",
    "activated": true,
    "alertChannelSubscriptions": [
      {"channelId": 12345, "activated": true}
    ]
  }'

# Response includes the ping URL:
# {
#   "id": "abc-def-123",
#   "pingUrl": "https://api.checklyhq.com/heartbeats/abc-def-123",
#   "name": "Nightly DB Backup",
#   ...
# }

# Ping from your cron job:
curl -fsS https://api.checklyhq.com/heartbeats/abc-def-123

Checkly's Heartbeat API works well. The main difference is the additional configuration for alert channel subscriptions and the slightly more verbose period definition. Both tools get the job done—CronPeek's API is a bit more minimal by design.

Monitoring as Code (Checkly-only)

One thing CronPeek doesn't offer is Checkly's Monitoring as Code workflow. If you want your cron monitors defined in TypeScript and deployed via CI/CD, Checkly supports this:

// checkly.config.ts
import { HeartbeatCheck } from 'checkly/constructs'

new HeartbeatCheck('nightly-backup', {
  name: 'Nightly DB Backup',
  period: 1440,
  periodUnit: 'minutes',
  grace: 15,
  graceUnit: 'minutes',
  activated: true,
})

// Deploy: npx checkly deploy

This is a genuine advantage for teams that manage infrastructure declaratively. CronPeek currently only supports REST API and dashboard management—there's no CLI or IaC integration.

The Honest Take

Checkly is a broader monitoring platform. CronPeek does one thing and does it cheaper. They're not really competing head-to-head because they serve different primary needs.

Checkly's real competition is Datadog Synthetics, Grafana Synthetic Monitoring, and Playwright-based monitoring solutions. Their Heartbeat checks are a valuable addition to a synthetic monitoring platform, not their core selling point.

CronPeek's real competition is Cronitor, Healthchecks.io, and Dead Man's Snitch—tools that specialize in cron job monitoring. In that category, CronPeek competes on price and API simplicity.

If you need both synthetic monitoring and cron monitoring, you have two solid options:

1. All-in-one: Use Checkly for everything. You pay more for cron monitoring, but you get one platform, one dashboard, one alert pipeline.
2. Best-of-breed: Use Checkly for browser and API monitoring, CronPeek for cron jobs. Lower combined cost, purpose-built tools for each job, and webhook alerts can route to the same Slack channels.

If you only need cron monitoring, CronPeek is the clear winner on cost. $9/month for 50 monitors versus $30+/month for a platform where you'll use one feature.