What is CertNotifier?
Let'sEncrypt is ending email reminders in June 2025, CertNotifier is here to fill the gap. Get notified before your SSL certificates expire and avoid downtime. CertNotifier is a simple, affordable solution for developers, agencies, and website owners.
Problem
Users currently rely on Let's Encrypt email reminders to track SSL certificate expiration, but Let's Encrypt will discontinue email reminders in June 2025, leaving them at risk of unnoticed certificate expiration and potential website downtime.
Solution
CertNotifier is a monitoring tool that automatically tracks SSL certificate expiration dates and sends alerts via email/Slack, enabling users to prevent downtime by renewing certificates proactively. Example: Users add domain(s) and set notification thresholds (e.g., 30 days before expiry).
Customers
Developers, agencies, and website owners managing multiple domains or client websites, particularly those dependent on Let's Encrypt certificates.
Unique Features
Fills the gap left by Let's Encrypt’s discontinued reminders; focuses exclusively on SSL expiry alerts with simplicity and affordability compared to broader infrastructure monitoring tools.
User Comments
Solves critical post-Let's Encrypt email phase
Easy setup for multiple domains
Affordable for small agencies
Essential for uptime maintenance
Slack integration saves time
Traction
Launched on ProductHunt in 2023, gained 400+ upvotes; pricing starts at $5/month for 10 domains; exact revenue/user stats undisclosed but positioned for growth as Let's Encrypt’s 2025 deadline approaches.
Market Size
The global SSL certificate market was valued at $1.7 billion in 2023 (Grand View Research), with demand driven by increasing HTTPS adoption and cybersecurity threats.
