CertSentry
Your SSL certificate expires in 7 days. Would you know?
Free personal workspace forever. Paid plans start at $5/mo (Starter), $12/mo (Pro), $50/mo (Agency). Annual billing saves ~2 months.
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CertSentry keeps watch over your certificates, domains, DNS and uptime, and warns you days before anything breaks. It opens real TLS connections, tracks domain registration expiry via RDAP, snapshots DNS records daily, and checks uptime from multiple regions. Alerts are delivered via email, Slack, Telegram, Discord, and webhooks. It also offers public status pages, Certificate Transparency monitoring, DMARC parsing, TCP port checks, and heartbeat monitoring.
Key features
- SSL certificate expiry monitoring (real TLS connection)
- Domain registration expiry tracking (RDAP with WHOIS fallback)
- DNS record change detection (A, AAAA, MX, NS, CNAME, TXT)
- Uptime monitoring from multiple regions (N. America, Europe, Asia)
- Alert thresholds: 30, 14, 7, 3, 1 days before expiry
- Two-region, two-consecutive-check outage confirmation
- Certificate Transparency alerts
- TCP port checks
- Heartbeat monitoring for cron jobs, backups, deploys
- DMARC report parsing
- Public status pages with certificate and domain health
- Shared workspaces with role-based access
- Environment labels (production/staging)
- Monitor client domains without ownership
- REST API with scoped keys
- Daily uptime stats with p50/p95 latency
- Declarative monitor sync from repo with dry-run
- Data export and deletion
Pricing
Free personal workspace forever. Paid plans start at $5/mo (Starter), $12/mo (Pro), $50/mo (Agency). Annual billing saves ~2 months.
Free
$0 / month
- 1 monitor
- Daily checks
- Email alerts
- Personal workspace forever
Starter
$5 / month
- 10 monitors
- Uptime every 5 min
- 1 public status page
- Slack, Telegram, Discord & webhook alerts
Pro
$12 / month
- 50 monitors
- Uptime every 1 min
- 3 regions
- Certificate Transparency alerts
Agency
$50 / month
- 250 monitors
- Unlimited team seats
- 10 status pages
- Custom domains + white-label status pages
Frequently asked
- What is CertSentry?
- CertSentry is an IT management tool that monitors SSL certificates, domains, DNS, and uptime, alerting you before anything breaks.
- What category does CertSentry belong to?
- CertSentry is categorized under IT Management.
- How does CertSentry monitor SSL certificates?
- CertSentry opens real TLS connections to check certificate expiry and sends alerts at thresholds of 30, 14, 7, 3, and 1 days before expiration.
- What integrations does CertSentry support?
- CertSentry integrates with Slack, Telegram, Discord, and webhooks using HMAC-SHA256 signed payloads.
- What is the pricing for CertSentry?
- CertSentry offers a free personal workspace forever. Paid plans start at $5/month (Starter), $12/month (Pro), and $50/month (Agency). Annual billing saves approximately 2 months.
- Who is CertSentry for?
- CertSentry is designed for teams and agencies that need to monitor SSL certificates, domains, DNS, and uptime to prevent silent outages.