CertAvert vs Seal Security

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

CertAvert compared with Seal Security
Detail	CertAvert	Seal Security
What it does	Free SSL/TLS certificate monitoring with email alerts	The fix layer for the AI era
Stage	Not given	Not given
Founded	Not given	2023
Based in	US	US
Pricing model	Freemium	Free trial
Pricing	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.	Free beta tier available. Paid plans include Starter, Business, and Scale tiers with pricing based on scope of coverage, supported ecosystems, deployment requirements, and support level. Starter tier for proof-of-value pilots, Business for ongoing remediation, Scale for unlimited enterprise coverage
Key features	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	Verified, backported patches for existing versions without upgrades Pre-CVE vulnerability fixing before public disclosure Container and Linux base image remediation AI coding agent integration via MCP server Integration with major vulnerability scanners Support for 8+ programming languages including Java, Python, JavaScript, C/C++, Go, PHP, C#, and Ruby 24/7 customer support with direct Slack/Teams channels
What makes it different	Detects auto-renewal failures before visitors see them Explains broken chains and TLS issues with fix guidance Independent operation with no investors	Fixes vulnerabilities before CVEs are published and before vendors release fixed versions Human-reviewed and verified patches, not AI-generated code Minimal code changes averaging just 6.5 lines per patch No forced upgrades, migrations, or breaking changes to applications Patches for unfixable vulnerabilities in end-of-life systems
Community votes	0	0
DR (Domain Rating by Ahrefs)	3 +1 (up) since last check	50 +1 (up) since last check
Trust Flow (Majestic)	1	13
Citation Flow (Majestic)	24	35
Referring domains (Majestic)	14	203

6 details filled in for both companies.

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