Allegro RomCert vs crt.sh: Side-by-Side Comparison (2026)

Allegro RomCert: OCSP/SCEP cert lifecycle mgmt toolkit for embedded/IoT systems. built by Allegro Software Development. Core capabilities include OCSP (RFC 2560) implementation for certificate status verification, SCEP implementation for automated certificate enrollment, Certificate request and renewal via HTTP to any Certificate Authority..

crt.sh: Bash script for subdomain enumeration via crt.sh certificate transparency logs. Core capabilities include Subdomain enumeration via certificate transparency logs, Automated querying of crt.sh website, Parsing and filtering of crt.sh output..

Both serve the Certificate Lifecycle Management market but differ in approach, feature depth, and target audience.

Allegro RomCert differentiates with OCSP (RFC 2560) implementation for certificate status verification, SCEP implementation for automated certificate enrollment, Certificate request and renewal via HTTP to any Certificate Authority. crt.sh differentiates with Subdomain enumeration via certificate transparency logs, Automated querying of crt.sh website, Parsing and filtering of crt.sh output.

Allegro RomCert integrates with Allegro RomSTL (embedded SSL/TLS), Allegro RomSShell (embedded SSH). crt.sh integrates with crt.sh. Check integration compatibility with your existing security stack before deciding.

Allegro RomCert and crt.sh serve similar Certificate Lifecycle Management use cases: both cover SSL. Key differences: Allegro RomCert is Commercial while crt.sh is Free. Review the feature comparison above to determine which fits your requirements.