Automated SSL/TLS certificate monitoring and expiration alerts
An expired SSL certificate blocks visitors with security warnings. Deltum monitors your certificates continuously and alerts you well before expiry.
Why automated certificate renewals fail silently
Even with auto-renewing tools like Certbot or cloud providers, renewals often fail due to firewall changes, DNS updates, or server misconfigurations. If unnoticed, your certificate expires in production. Deltum runs external checks to verify expiration dates, TLS handshakes, and trust chains before users are affected.
Advance Expiration Warnings
Receive scheduled notifications (30, 14, 7, 3, and 1 day before) to fix renewals before any outage occurs.
Trust Chain & Root CA Verification
Verify intermediate and root chains to ensure every modern browser and mobile device trusts the certificate.
TLS Latency & Handshake
Track TLS 1.3/1.2 handshake times to keep connections fast, secure, and responsive.
How it works in 3 simple steps
Add your domain
Deltum discovers your certificate issuer (Let’s Encrypt, Cloudflare, DigiCert), expiry timestamp, and covered domains.
Automated background checks
We verify TLS validity periodically. Once renewed, Deltum automatically refreshes the expiration date without noisy alerts.
Alerts where your team works
If a certificate nears its expiry deadline without renewal, you receive an alert via Telegram, Email, Slack, or Webhook.
Related Observability Layers
Complement SSL tracking with continuous uptime probes, DNS health, and status pages.
Uptime Monitoring
Monitor HTTP endpoints, APIs, and TCP ports with fast outage alerts.
DNS Resolution Monitoring
Verify DNS records and nameserver health across global public resolvers.
Status Pages & SLAs
Publish public or private status dashboards with custom branding and domain.
Free Site Checker Tool
Inspect SSL certificates, response headers, and TTFB for any website.
Frequently Asked Questions about SSL Monitoring
Any public TLS/SSL certificate: Let’s Encrypt, Cloudflare, DigiCert, Sectigo, AWS ACM, wildcard (*.domain.com), and SAN multi-domain certificates.
By default, notifications are sent at 30, 14, 7, 3, and 1 day prior to expiration.
No. Checks are performed externally over standard TLS connections, exactly like a regular browser visiting your site.
Never experience downtime from an expired SSL certificate again
Add your domains to Deltum Observability in 1 minute and gain peace of mind with automated early warnings.