Tenium vs Cronitor

Cron monitoring is Cronitor's home turf

Cronitor began as a way to find out when a scheduled job did not run, and that depth shows. It has libraries for the common languages, can discover jobs on a host, captures job output and duration, and treats each job as a first-class thing with history. If a missed overnight task costs you money, that detail is what you are paying for.

Tenium does heartbeat monitoring too, from the Starter plan, but in a plainer way: a URL your job calls, a schedule and a grace window. It is enough for many agencies and not enough for a data platform.

The per-monitor model against a flat plan

Cronitor charges $2 per monitor per month plus $5 per user, with volume discounts we cannot see. Tenium Pro charges $29 flat for 300 monitors with 100 heartbeats separate, and 5 seats. Heartbeats do not consume the monitor allowance here, which makes a mixed fleet cheaper than it looks. Dollar prices are compared as published. Euro prices are shown as published and converted at about EUR 1 = USD 1.08 for the percentages.

• 20 monitors, 3 people: Tenium Pro at $29. For Cronitor: 20 x $2 + 3 x $5 = $55 before discounts. Tenium comes out about 47% cheaper.
• 100 monitors, 3 people: Tenium Pro at $29. For Cronitor: 100 x $2 + 3 x $5 = $215 before discounts. Tenium comes out about 87% cheaper.
• 400 monitors, 3 people: Tenium Agency at $59. For Cronitor: 400 x $2 + 3 x $5 = $815 before discounts. Tenium comes out about 93% cheaper.

What changes in your jobs

This is the part that costs time. Every heartbeat gets a new ping URL in Tenium, so each job has to be edited. A typical crontab line changes only at the tail:

• Cronitor lines that wrap a command with their CLI or call their endpoint are replaced with a plain curl call to the Tenium ping URL after the job succeeds.
• Add the /start suffix before long jobs and the /fail suffix on error branches if you want duration tracking and instant failure incidents.
• The schedule goes into the Tenium heartbeat as a cron expression with a time zone, or as a period in seconds, plus a grace window. Make the grace at least as long as your slowest normal run.
• Keep a spreadsheet of old URL, new URL and host for the migration week. It is dull and prevents a missed job.

Where Cronitor pulls ahead

If any of these matter to you, weigh them heavily:

• Client libraries and a CLI, so integration looks like code rather than a shell one-liner.
• Automatic job discovery and richer telemetry such as run output and durations.
• Low cost for very small accounts, where per-monitor pricing is cheap and the free plan covers a few jobs.

Where Tenium pulls ahead

Websites and client delivery. A status page per client, white-label on Pro, and a report per client on Agency ($59) are all things a cron-first tool does not build. Uptime checks confirm from all two regions, and SSL and domain expiry monitoring come with Starter and above. Setup needs no code at all, which suits a team where the person who owns clients is not a developer.

Export and import details

Export monitors with the Cronitor API as JSON and import the list via Import in the sidebar in Tenium; uptime-style monitors with a URL or host can come across, and you see a preview first. Create your cron and heartbeat monitors in Tenium by hand: each gets a new ping URL that you must paste into the job. Alert integrations such as Slack are not imported; add them as Tenium contacts and check each one with the test button before you trust it.

Keep Cronitor if

Your product depends on scheduled work, you need job output attached to alerts, or you are billed on a handful of monitors and are happy. In that case the monitor-count maths above does not apply to you, and a split setup, with Cronitor for jobs and Tenium for sites, is a good answer.