NumBan vs CertAvert

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

NumBan compared with CertAvert
Detail	NumBan	CertAvert
What it does	Hit them in the numbers	Free SSL/TLS certificate monitoring with email alerts
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	US
Pricing model	Freemium	Freemium
Pricing	NumBan Pro Yearly — $9.99 USD (or the equivalent shown in the App Store for your region)	Free plan: 3 domains, no card needed. Starter: $50/year for 10 domains. Plus: $100/year for 20 domains. Pro: $150/year for 50 domains.
Key features	Voicemail transcription and callback number extraction Automatic carrier abuse report filing Weekly number status re-checking Kill tracking and confirmation Public leaderboard ranking Optional screenshot verification Private data storage Relay email address for reporting	Certificate expiry notifications at 30 days, 14 days, 7 days, and on expiry Broken chain detection with fix guidance TLS version and cipher checking Domain DNS and registration monitoring Certificate change history and alerts Certificate report for audits Certificate transparency log monitoring No server access or installation required
What makes it different	Uses callback numbers instead of spoofed caller ID as the target for reports Keeps personal email private in carrier complaints Confirms kills through weekly re-checking and automation Single screen interface with all report information together	Detects auto-renewal failures before visitors see them Explains broken chains and TLS issues with fix guidance Independent operation with no investors
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	3 +1 (up) since last check
Trust Flow (Majestic)	1	1
Citation Flow (Majestic)	24	24
Referring domains (Majestic)	14	14

6 details filled in for both companies.

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