Alternatives

Products that do what CertSonar does

SSL, domain & DNS monitoring get alerted before things break

1
SSL Alerts▲157
Free service to send SSL certificate expiration alerts
2018
2
Certly▲7
Know before your SSL, domain, or DNS breaks
Jul 2026 · certly.dev
3
Momento▲140
A powerful platform to help you monitor your domains
2020
4
DomainWatch▲351
Domain Monitoring Made Easy
2018
5
CertWarden: SSL Expiry Tracker▲10
Track SSL expiry before it breaks your site
Feb 2026
6
CertFleet▲1
SSL + uptime monitoring without the observability bill
23d ago
7
CertChecker▲1
Never find out an SSL cert expires too late
22d ago · certchecker.dev
8
ExpiryPing SSL Certificate Monitoring▲2
SSL & domain expiry alerts for agencies. 5-min setup.
Jun 2026 · expiryping.dev
9FC
Free Certificate Monitoring via RSS▲120
2024 · raphting.dev
10
PingPing▲168
A simple tool to monitor your website and SSL
2018
11CS
CertStream – See SSL certs as they're issued in real time▲142
2017 · certstream.calidog.io
12NH
Never have an SSL certificate expire again▲40
2022 · haveibeenexpired.com
13
CertPost▲3
SL monitoring that checks the certificate your server serves
Aug 2026 · certpost.ai
14
Wakeful▲2
Know when your cron jobs, SSL certs, and DNS break
19d ago · wakeful.dev
15
DomainWatchBot▲116
A bot that tells you when your domains are about to expire
2017
16
KIT.domains▲28
Domain infrastructure monitoring across all registrars
Mar 2026
17
Domain Comet▲88
We monitor your domains, so you don't have to.
2020
18CF
CertRadar – Find every certificate ever issued for your domain▲21
Jan 2026 · certradar.net
19
Never miss a client deadline again▲1
Stop losing clients to expired domains & SSL certs
12d ago · duvento.com
20
CertFleet – SSL and HTTP uptime monitoring with live TLS probes and alerts
CertFleet monitors SSL certificates and HTTP uptime in one place. It opens a real TLS handshake on port 443, tracks Certificate Transparency for new issuances, and sends alerts at 30, 14, 7, and 1 day before expiry. You can configure HTTP checks with custom methods, paths, status
7d ago · certfleet.net
21TC
TLS cert expiration dashboard▲40
2016 · github.com
22
JustChecker▲1
Fast Uptime, Website,SSL & Domain Expiry Monitoring Tools,
3d ago · justchecker.com
23
Domain Watchdog▲3
Catch every client domain problem before it costs you
Jul 2026 · domainwatchdog.app
24
Pingify▲32
Real-Time Monitoring for Websites
2024

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