Alternatives to Cert Spotter
A hosted Certificate Transparency monitor that alerts on unauthorized, expiring and invalid SSL certificates for your domains. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Cert Spotter
A hosted Certificate Transparency monitor that alerts on unauthorized, expiring and invalid SSL certificates for your domains.
Replacements
Listings that take over the same core job as Cert Spotter.
TrackSSL
A hosted service that monitors SSL/TLS certificates and sends alerts before they expire or change.
TrackSSL is freemium and alerts on expiry and certificate changes via email, Slack, SMS and Teams, including internal and self-signed certificates, without Certificate Transparency discovery.
Hardenize
A web site configuration tester and monitoring service for network, certificate and security settings.
Hardenize offers continuous certificate and perimeter monitoring for organisations plus free public configuration reports, with little public pricing detail.
Oh Dear
A hosted website health monitor covering uptime, SSL, DNS, cron jobs, broken links and performance.
Oh Dear monitors SSL certificates as part of wider uptime, DNS, cron and broken link checks, and is EU-hosted with no permanent free plan.
Better Stack Uptime
A hosted uptime monitor that checks websites, APIs, SSL certificates and domains and sends alerts.
Better Stack Uptime includes SSL certificate and domain expiry checks within a freemium uptime monitor, rather than watching Certificate Transparency logs.
updown.io
A hosted website monitor that checks HTTP, TCP and ICMP endpoints, certificates and cron jobs.
updown.io includes certificate and domain expiry monitoring in a usage-priced uptime service, but does not detect unauthorized certificate issuance.
Also worth comparing
These listings name Cert Spotter as their own alternative, so the relationship runs both ways.
crt.sh
A free web search engine for certificates recorded in public Certificate Transparency logs.
Cert Spotter is a paid hosted service that watches Certificate Transparency logs and alerts you on new or broken certificates, instead of manual searches.
Similar software
Related functionality, not a direct replacement.
CAA Test
A web tool that checks the DNS CAA records published for a domain.
SSL Labs Server Test
A Qualys web service that analyses the TLS/SSL configuration of a public web server.
SSL Shopper SSL Checker
An online checker that verifies a server's SSL certificate installation, chain, hostname and expiry.
StatusCake
A hosted monitoring service for website uptime, page speed, SSL certificates, domains and servers.
Cronitor
A hosted monitoring service for cron jobs, background workers, websites and APIs, with failure alerts.
Who.is
A web lookup for WHOIS, RDAP, DNS records, nameservers and IP ownership of any domain.
