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Dev tools · March 11, 2026

CertSonar

SSL, domain & DNS monitoring get alerted before things break

What it does

CertSonar monitors your SSL certificates, domain registrations, and DNS records around the clock. Get email, push, webhook, or Slack alerts 30, 14, and 7 days before anything expires — so your clients never see a browser warning or an offline site.

Does the same job

all alternatives →
  • SSL Alerts2018 · ▲157

    Free service to send SSL certificate expiration alerts

  • CertlyJul 2026 · certly.dev · ▲7

    Know before your SSL, domain, or DNS breaks

  • Momento2020 · ▲140

    A powerful platform to help you monitor your domains

  • DomainWatch2018 · ▲351

    Domain Monitoring Made Easy

  • CertWarden: SSL Expiry TrackerFeb 2026 · ▲10

    Track SSL expiry before it breaks your site

  • CertFleet23d ago · ▲1

    SSL + uptime monitoring without the observability bill

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