Checks as often as every 60 seconds, from outside your hosting
Website downtime checker that calls your phone when a site goes down
TrackDowntime checks any website or API as often as every 60 seconds. When something stops responding it emails you, and on Professional and above it also calls your phone and texts you, then keeps alerting until the site is back.
- Check interval
- 60 seconds
- Alert channels
- Call, SMS, email, Slack
- Escalation
- Until recovery
HTTP 200 · checked 12 s ago
HTTP 200 · checked 41 s ago
Recovered after 5 min 04 s outage
Complete site uptime monitoring
An uptime monitor with instant downtime alerts and response time history. Everything needed to track website downtime and prove what happened.
Site uptime checker
Monitor every website and endpoint you run in one list. Live status, response time and uptime percentage at a glance.
Downtime monitor alerts
A failed check triggers a phone call, an SMS and an email, and the alert repeats until the endpoint answers again.
Website downtime tracker
Every outage is logged with its start, end and duration. Export the history or read it as a chart.
Response time tracking
Each check stores the status code and the response time, so a site getting slower is visible before it goes down.
Web uptime monitor
Checks run from outside your hosting, so the result is what a visitor gets, not what the server thinks.
Escalating alerts
Alerts repeat on a backing off schedule until the site is back, and recovery is confirmed with its own notification.
Get a phone call when your site goes down
Email and SMS lose to a silent phone at night. A failed check places an automated voice call, so downtime reaches a person even when nobody is at a computer.
- Instant voice alerts
- The call is placed as soon as the repeated check confirms the endpoint is really down.
- Nobody sleeps through it
- Calls wake the person on call, or go to whoever is responsible that night.
- Emergency bypass ready
- Calls come from a fixed number, so you can allow it through Do Not Disturb.
- Repeats until recovery
- The alert comes back on a backing off schedule until the endpoint answers again.
Alert timeline of a single outage
- 09:41:03 Check failed Endpoint answered HTTP 503 instead of 200
- 09:41:12 Failure confirmed Check repeated after a short delay, still failing
- 09:41:15 Phone call placed Automated voice call to the on call number
- 09:41:16 SMS and email sent Same incident, same reference number
- 09:43:15 Alert repeated Endpoint still down, call placed again
- 09:46:07 Recovery confirmed HTTP 200 in 210 ms, outage logged as 5 min 04 s
Every incident keeps this timeline, so the outage length in a report is measured, not estimated.
Uptime monitor pricing
Plans are priced by endpoints and check interval. Phone, SMS and email alerts are never billed per message.
Starter
One site or a side project
$49 $24/mo
$588 $288/year, billed once Billed monthly, cancel any time
- 5 endpoints
- 5 minute checks
- Email alerts to you and 3 teammates
- Slack channel alerts
- Signed webhook to your own systems
- Uptime reports
Professional
RecommendedProduction sites and APIs
$99 $49/mo
$1,188 $588/year, billed once Billed monthly, cancel any time
- 25 endpoints
- 60 second checks
- Phone call alerts
- SMS alerts
- Email to 10 teammates
- Everything in Starter
Enterprise
Agencies and large portfolios
$299 $149/mo
$3,588 $1,788/year, billed once Billed monthly, cancel any time
- Unlimited endpoints
- 60 second checks
- Phone call and SMS alerts
- Email to your whole team
- Downtime history with no limit
- Dedicated support
Prices in US dollars. Yearly billing is charged once and works out at roughly half the monthly rate.
Professional website uptime monitoring
Most teams think about website uptime monitoring for the first time during an outage. By then the customers already know. Monitoring exists to reverse that order: the alert arrives first, the fix starts before anyone writes in.
A check that runs on the same hosting as the site cannot tell you the site is unreachable. TrackDowntime checks from outside that hosting and records the result of every single check. That history is what turns a vague feeling that the site is slow into a number you can act on.
It works the same way for one site and for a hundred: the same endpoints list, the same alerting rules, the same reports.
What every check records
- Status code
- HTTP response of the endpoint
- Response time
- Milliseconds, kept for the full history
- Timestamp
- When the check ran, to the second
- Outage length
- From the first failure to the confirmed recovery
- Alerts sent
- Which channel fired, and when
Advanced site uptime checker
Add the addresses you care about, pick how often each one is checked, and the site uptime checker takes over. Websites, APIs, checkout endpoints, admin panels: anything that answers over HTTP can be watched, and each endpoint keeps its own history and its own alerting rules.
Check interval
60 s
Down to one minute on Professional and above
Recheck
Automatic
A failure is repeated before any alert goes out
Alert channels
Five
Email, Slack and a signed webhook on every plan, phone call and SMS from Professional
History
Full
Every check kept, exportable
How the website uptime checker works
Each endpoint is requested on its own schedule from outside your hosting. A single failure is not treated as an outage: the check is repeated after a short delay first, which filters out momentary network noise and keeps false alarms out of your phone.
Once the failure is confirmed, the incident opens, alerts go out, and the clock starts. It stops on the first successful check, and the recovery notification carries the exact outage length.
Website uptime checker features
- Real time status
- The endpoint list changes state as results come in
- Automatic recheck
- Confirmation before an alert is raised
- Custom frequency
- Per endpoint, from 60 seconds upwards
- Analytics and export
- Uptime percentage, response times, outage log
Downtime tracker that tracks downtime with precision
The worst way to learn about an outage is a customer email the next morning. The website downtime tracker records every incident as it happens, with its start, its end and a measured duration instead of an estimate.
Track downtime automatically
Incidents are opened, timed and closed without anyone touching the dashboard. Each one keeps what failed, when it started, how long it lasted and when recovery was confirmed.
All endpoints sit in one place, so a pattern across several sites is visible instead of buried in separate tools.
Track downtime history
History is kept for every check, not only for failures. An outage that repeats every Tuesday at three in the morning stops looking like bad luck once it appears in a report twice.
Reports show what failed and when, which is also what an SLA conversation with a client or a hosting provider needs.
Website downtime monitor
A downtime monitor is an early warning system. It watches the endpoints you depend on, confirms a failure with a repeated check, and tells the right person immediately. Aiming at 99.9% uptime only works if the missing 0.1% is caught in minutes rather than hours.
60 s
Check interval
5
Alert channels
Recheck
Before alerting
24/7
Monitoring
Website uptime monitoring software, without the setup project
Monitoring software tends to fail in one of two directions: an enterprise console that needs a week of configuration, or a free checker that emails once and gives up.
TrackDowntime sits between them. Paste the addresses, choose the interval, add the phone number that should ring. Setup takes minutes, and the parts that matter during an incident, confirmation, escalation and history, are already on.
Read the setup docs →What you get on day one
Continuous checks
Endpoints are checked around the clock on your schedule
Five alert channels
Phone call, SMS, email, Slack and a signed webhook, none of them metered per message
Incident log
Start, end and duration of every outage, per endpoint
Reports
Uptime percentage and response times per endpoint
Escalation rules
Repeat alerts until someone acknowledges or the site recovers
Recovery notice
A separate message with the confirmed outage length
Why you need an uptime monitor
Revenue
An hour of downtime on a checkout page is an hour of orders that never happen. Catching it in minutes is the cheapest fix available.
Trust
Customers forgive an outage they were told about. They remember the one they discovered themselves.
Performance
Response time history shows which endpoints are drifting, long before they fail outright.
SLA proof
Reports and incident history give a client, or a hosting provider, the evidence a conversation needs.
Before you pick a monitoring plan
Two things decide the bill: how many endpoints you need, and whether the vendor meters alerts. Both are covered below.
Downtime tracker and outage log
Every outage logged with its start, end and duration, plus how long each plan keeps the uptime history.
Downtime alerts by phone call
An automated call, SMS and email the moment an endpoint fails, and escalation that repeats until recovery.
Uptime monitoring pricing compared
What eight monitoring tools charge in 2026, real cost per site, and the fees that inflate the invoice.
Website monitoring for agencies
Monitoring a portfolio of client sites from one account, endpoint sizing per client and cost per site.
Uptime monitor pricing
Endpoint counts, check intervals and which plan unlocks SMS and phone call alerts.
Downtime alert services compared
What the alert services for small business sites charge, which of them place a phone call, and how fast an outage reaches a person.
Downtime monitoring
What a downtime monitor counts as down, how rechecks filter out false alarms, and monitoring APIs with auth headers.
WordPress uptime monitoring compared
Jetpack, ManageWP, WP Umbrella, UptimeRobot and TrackDowntime on check interval, phone alerts and price per site.
Server down alert
A phone call and SMS to every number on the list when a server, API or health check endpoint stops answering.
Pingdom SMS alerts cost
What Pingdom SMS credit bundles give you per tier, how fast an outage uses them, and alternatives with calls included.
Ecommerce uptime monitoring
Watching the cart, the checkout and the payment callback as separate endpoints, and why a cached homepage hides a broken store.
UptimeRobot SMS and voice credits
What a credit pack costs per text and per call, how fast one incident burns through it, and why plan bundles arrive only once.
SaaS uptime monitoring
Monitoring the app login, API and health route against your uptime SLA, and why the check interval is part of the SLA math.
Uptime.com pricing and SMS limits
Every Uptime.com tier by check count, the monthly SMS and call allowance, add-on costs and where a flat plan costs less.
Pingdom pricing per uptime check
All 22 Pingdom tiers from 10 to 30,000 checks, the real cost per check, and what 650 endpoints cost next to a flat plan.
StatusCake alternative
For teams that missed an outage because StatusCake calls once and never repeats: calls and texts that keep going until recovery.
Better Stack pricing per responder
The $34 Responder license, $25 monitor packs, and what Better Stack costs with one or three people on call.
Better Stack alternative
For teams paying a license per person so phones ring: calls and texts to every number, repeating until recovery.
Uptime.com alternative
For teams whose monthly SMS and call allowance runs out on a bad night: alerts that are never counted or capped.
Site24x7 pricing
Web Uptime, Web Perf and infrastructure plans, monitor pack prices, and how SMS and voice credits are counted.
Datadog uptime monitoring alternative
For teams paying Datadog per test run for checks that only answer whether a site is up.
Datadog Synthetics pricing
What a one minute uptime check costs per location, per URL and with On-Call seats for phone alerts.
Checkly alternative
For teams that moved to Checkly Team only to get phone calls. Every number rings, no call credits.
Checkly pricing
Starter and Team prices, check run overages, retries and phone call credits at 5 to 650 endpoints.
Pingdom alternative
For Pingdom customers who need a phone to ring. Calls to every number, no SMS allowance, one flat price past 100 endpoints.
Cronitor pricing
Per monitor and per user charges, status page add-ons and the paging cost of phone calls at 5 to 650 monitors.
UptimeRobot alternative
For teams whose SMS and voice credits ran out mid-incident. Calls to every number on every round, nothing metered.
StatusCake pricing
Superior and Business prices, cost per monitor, separate status page plans and the 70 day cancellation notice.
Oh Dear alternative
For agencies that need a phone to ring when a client site fails. Calls and SMS built in, no Vonage account to connect.
Oh Dear pricing
Every Oh Dear tier from 2 to 200 sites, cost per site, and what paging and Vonage SMS add for an agency.
Pingdom vs UptimeRobot
Price per monitor, SMS allowances, credits and phone calls side by side, read from both pricing pages.
OneUptime pricing
The per user plan, $1 per monitor and metered SMS and call minutes, priced for 1 to 5 person teams.
StatusCake vs UptimeRobot
Price at 10 to 500 monitors, SMS credits, single calls versus metered calls, seats and status pages.
Pingdom vs StatusCake
StatusCake is about six times cheaper at 100 monitors. What Pingdom adds for the money and how each alerts.
Website monitoring SMS alerts
A text and a call to every number on the endpoint, repeated until the site is back, with a recovery text. No credits.
UptimeRobot pricing
Every UptimeRobot plan and tier in euros, seats and SMS credits, and the cost at 10 to 650 monitors.
Uptime.com vs Pingdom
Uptime.com costs about half as much per check. Advanced checks, SMS and call limits and status pages side by side.
Pingdom vs Datadog pricing
Flat Pingdom tiers against Datadog per run billing at 5 to 650 URLs, intervals, locations and call costs.
New Relic uptime monitoring alternative
New Relic ping monitors are free but cannot ring a phone. Calls and SMS to every number, no paging seats.
New Relic synthetics pricing
Free ping monitors, $0.005 per check above the allowance, user seats and the overage at 1 to 25 monitors.
Dynatrace synthetic monitoring alternative
Dynatrace bills $0.001 per HTTP request per location. 25 endpoints every minute with calls for a flat $99.
Datadog On-Call pricing
$20 a seat annual, $29 on demand, the $40 bundle, seat rules and team totals at 1 to 10 people.
Grafana Cloud synthetic monitoring alternative
Grafana bills every check run at every probe. 25 endpoints every minute with calls for a flat $99.
Hyperping pricing
$29, $89 and $299 a month, seats, SMS credits, the 5 minute call limit and the cost at 25 to 650 monitors.
Start your uptime monitor in a few minutes
Add your first endpoint, set the interval and the number that should ring. No credit card is needed to try it.