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Sentinel vs Pingdom: Features, Free Plans & Pricing Compared

Sentinel vs StatusCake: Features, Free Plans & Pricing Compared

Sentinel vs Better Stack: Features, Free Plans & Pricing Compared

Sentinel vs UptimeRobot: Features, Free Plans & Pricing Compared
Certificate Inventory table with hostname, issuer, renewal method, owner, expiry window and monitor status columns, plus blank rows for practical use.

How Agencies Should Manage Client SSL Certificates

A checklist and monitoring approach for agencies managing SSL certificate validity, expiry and chain issues across every client website.
Example domain expiry alert email for client-example.com showing 14 days remaining, registrar, owner and a renewal timeline with reminder stages.

How to Prevent Client Domains From Expiring

Registrar emails aren't enough. See how agencies track renewal ownership and use WHOIS monitoring to stop client domains lapsing unnoticed.
Client Infrastructure Register table with columns for client, service, provider, hosting, renewal or expiry, critical link and alert owner, plus blank rows for completion.

Agency Website Maintenance Checklist

A practical maintenance checklist for agencies covering uptime, SSL, DNS, domain expiry, updates and backups — plus what can be automated and what still needs a person.
Sentinel dashboard graphic showing active checks, availability, items needing review, incidents, a 24-hour trend and monitor statuses.

How to Monitor Multiple Client Websites From One Dashboard

See how agencies use Sentinel to monitor uptime, SSL, DNS and domains for every client website from a single dashboard, with alerts routed to the right person.
Vertical incident timeline showing detection at 10:02, responder alert, deployment identification, rollback, recovery confirmation, client summary and next-day review.

SaaS Incident-Response Checklist

A lightweight incident-response checklist for small SaaS teams: detection, ownership, communication and review, without a formal incident platform.
Sentinel dashboard overview showing overall uptime, total monitors, incidents, response time, an uptime trend chart, monitor groups and recent alerts.

SaaS Monitoring Without a DevOps Team: A Practical Guide for Small Teams

Build a practical SaaS monitoring baseline for applications, APIs, login, scheduled jobs, SSL, DNS and domains without a complex DevOps stack.
Dashboard showing a five-monitor starter stack for a SaaS product: app, login, API, SSL certificate and DNS, all healthy with response times and uptime.

What Should a SaaS Startup Monitor First?

A priority order for SaaS startups setting up monitoring for the first time: application, login, API, then SSL, DNS and domain checks.
API endpoint monitor configuration showing a GET request to a health endpoint, check interval, expected HTTP 200 status, and a check result showing status code and response time only.

How to Monitor an API Endpoint

How to set up API endpoint monitoring: which endpoints to check first, what to verify beyond the status code, and how to handle authenticated routes.
Cron-job monitoring checklist covering job criticality, schedule, grace period, secret storage, runbook, owners, runtime, output validation, alert testing, missing-signal rules and reviews.

How to Monitor Cron Jobs and Scheduled Tasks

Why scheduled jobs need heartbeat monitoring, not HTTP checks, and how to decide which cron jobs are worth monitoring first.
opt 17 heartbeat sequence

Heartbeat Monitoring: How to Detect Failed Cron Jobs and Scheduled Tasks

Learn how heartbeat monitoring detects missed cron jobs, backups, billing runs and scheduled processes by checking for expected completion signals.
DNS incident graphic comparing the approved A record 203.0.113.10 with an unexpected record 198.51.100.42, followed by detect, confirm, verify, restore and review steps.

Which DNS Records Should Be Monitored?

A, MX, TXT, CNAME and NS records each carry different risk. See which DNS records to prioritise for monitoring and why.
opt 12 ssl monitor concept

Why SSL Auto-Renewal Can Fail

Auto-renewal fails silently more often than teams realise. See the common causes and why independent SSL monitoring is still needed.