Free
$0/forever
- 5 monitored sites
- 15-minute fastest ping frequency
- 1 seat
- 30-day history
- 1,000 error events/month
- Email alerts included
Privacy-first uptime monitoring
Know your website is down before your customers do
ErrorNotifier watches public websites from outside your stack, confirms incidents before paging your team, and keeps response history clear enough for support, operations, and owners.
No credit card required
Domain ownership checks
Email alerts included
Human/agent setup wizardPublic instructions for Codex, developers, and site owners.
errornotifier.comOperational
- Uptime
- 99.982%
- Average response
- 142ms
Resolved incidentSlack and email notified after recovery confirmation
Free monitors5
Free ping frequency15 min
Paid fastest ping1 min
Included history30+ days
External uptime checksAvailable Now
Check your site from outside the hosting stack with expected status, keyword, redirect, and latency history.Incident workflowAvailable Now
Confirmed failures open incidents, recoveries resolve them, and every action lands in history.Alert routingAvailable Now
Email, Slack incoming webhooks, and verified webhook delivery with delivery logs.Error trackingBeta Foundation
Lightweight browser error capture with intelligent error grouping and privacy-safe payload handling.Automated test runsAvailable Now
CI can post test results so deploy quality and uptime incidents can be reviewed together.Developer details
ErrorNotifier keeps developer depth in docs and subpages: signed webhook verification, readable release-aware browser errors, protected source-map metadata, and privacy-safe error capture.
How incidents avoid noise
Scheduled checks record evidence first. Incidents open after confirmed failures, route alerts to the configured channels, then close when recovery is confirmed.
Simple setup, real operations
Add a URL, choose the expected HTTP status, set keyword checks when needed, and connect your first alert channel. ErrorNotifier records every check and opens incidents only after confirmed failures.
Incident lifecycle your team can follow
Failures, acknowledgements, recoveries, alert deliveries, and manual actions land in an append-only timeline with audit events for the organization.
Status pages and observability foundations
Publish a status page, capture browser errors, attach release context, and keep privacy-safe records that help support teams explain what changed.
Automated tests beside incidents
Post CI and unit-test runs into ErrorNotifier so a failed deploy, fresh error group, and broken test suite can be reviewed from the same workspace.
Resources
Turn alerts into a response system
Use the templates and guides to decide who owns an incident, how often to update customers, and what uptime target your current process can support.
Pricing preview
Useful free monitoring with clear upgrade paths for teams.
Starter
$9/month
- 20 monitored sites
- 5-minute fastest ping frequency
- 1 seat
- 90-day history
- 10,000 error events/month
- Email, Slack, and webhook alerts
Growth
$24/month
- 50 monitored sites
- 2-minute fastest ping frequency
- 3 seats
- 180-day history
- 50,000 error events/month
- Email, Slack, and webhook alerts
- Maintenance windows, e.g. mute deploy alerts Sunday 02:00-03:00
- Alert rules, e.g. route keyword failures to support and latency spikes to ops
Team
$59/month
- 150 monitored sites
- 1-minute fastest ping frequency
- 10 seats
- 365-day history
- 250,000 error events/month
- Email, Slack, and webhook alerts
- Maintenance windows, e.g. mute deploy alerts Sunday 02:00-03:00
- Alert rules, e.g. route keyword failures to support and latency spikes to ops
- Team roles and audit log
- Optional usage-based SMS alerts; exact SMS pricing is shown before enablement
Enterprise
Custom
- Custom sites and seats
- 1-minute fastest ping frequency
- 10,000,000 error events/month baseline
- SSO/SAML and invoice billing
- IP allowlisting support
- Private probes and contract SLAs
Developer ready
REST examples, worker setup, verified webhook delivery, automated test runs, readable browser errors, privacy-safe capture, and troubleshooting are documented from day one.
Read docsNuGet ready
Download ErrorNotifier.Extensions.Logging, verify its checksum, and install it from a local or organization NuGet source.
Operations ready
Incident templates, uptime budgets, and worker setup notes help teams turn monitoring into a repeatable response process.
Browse resourcesTrust ready
Security, privacy, and enterprise-readiness notes are separated into available, beta, and planned controls.
Visit trust centerPublic demo
Review the real product screens with read-only mock data
Open the demo workspace to inspect monitors, incidents, domains, alert channels, status pages, projects, issues, automated test runs, releases, artifacts, audit history, and umbrella reports without creating an account.