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Acme

Know before your clients do

Uptime, SSL and domain expiry monitoring for the sites you look after. One alert in forty seconds beats one angry email on Monday.

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No card required. 10 monitors free forever. Commercial use allowed.

40s
from failure to alert
8
kinds of check
2
confirmations before we wake you

What we watch

Uptime

Status code and response time, from outside your network.

Keyword

Catches pages that return 200 OK while showing an error.

SSL expiry

Certificate dates, chain and name mismatches.

Domain expiry

Registration dates straight from the registry over RDAP.

DNS records

Warns on a settings change or a hijacked nameserver.

Ports

Mail, database and anything else listening on TCP.

Built for the people who run other people's sites

If you look after ten, fifty or a hundred client sites, the problem is not one dashboard. It is knowing which client to call, and being able to prove the site was up.

Alerts where you already are

Email Telegram Slack Discord Webhook
shop.client-site.com is down
Reason HTTP 503
Detected 14:02:11 CET
Confirmed by 2 checks, 30s apart

One failed request is never enough to alert you. We re-check 30 seconds later, and we verify our own connectivity before believing a mass failure.

Pricing

Free
$0/mo
Start free
Starter
$5/mo
Start free
Pro
$12/mo
Start free
Business
$29/mo
Start free

Questions

Can I really use the free plan for client work?

Yes. Commercial use is allowed on every plan including free. That is deliberate: the alternative is watching people quietly break the terms of a competitor.

How do you avoid false alarms?

Three ways. A failure is re-checked 30 seconds later before it counts. Before believing any failure we confirm our own connectivity against reference hosts. And if more than a third of all monitors fail at once, we assume the problem is ours, hold the alerts and warn our operators instead.

Does "domain expiry" mean you know if I paid?

No, and nobody can. Registries publish the registration expiry date, not payment status. When you renew, the date moves forward within a day and the warning clears.

What happens if I downgrade?

Nothing is deleted. Monitors above the new limit are paused and can be resumed whenever you upgrade again.

Where do the checks run from?

Our own servers. Add our bot to your allowlist so a firewall does not report a working site as down.

Set up your first monitor in a minute

No card, no sales call, no trial countdown.

Start monitoring free