lego vs SSL.com Certificate Lifecycle Management

lego is an independent, free, open-source ACME client and Go library for obtaining, renewing, and revoking certificates. It supports wildcard and SAN certificates and can work with multiple ACME servers, including Let’s Encrypt and ZeroSSL. Validation choices include DNS-01, HTTP-01, TLS-ALPN-01, and DNS-PERSIST-01. The project lists more than 200 DNS providers, including Cloudflare, Amazon Route 53, Google Cloud DNS, and Azure DNS, with CNAME support enabled by default. Users can run lego from the command line or call it as a Go library. DNS credentials and settings are supplied through environment variables, with file references and dotenv files supported. Installation options include prebuilt binaries, Docker, package managers, and source. The maintainers look after the AUR and Snap packages; other listed packages are community maintained. The project lists support for ACME RFC 8555 and certificate validation and renewal extensions. It is licensed under MIT, and installing from source requires Go 1.25 or later. The project points to GitHub issues and discussions for help.

SSL.com Certificate Lifecycle Management supplies SSL.com certificates for use inside an existing certificate-lifecycle platform or a custom workflow. It acts as the Certificate Authority rather than a complete CLM system. An SSL.com account lists certificates issued through that account, supports downloading, renewal, reissue, and individual or bulk revocation, and sends email alerts before expiry. ACME can automate issuance and renewal. Venafi TPP users can connect through the Adaptable Driver for SSL/TLS, client-authentication, S/MIME, and code-signing certificates. The AnyCA Gateway REST plugin connects with Keyfactor Command 12.3 and later for issuing, revoking, and synchronizing certificates. Two REST/JSON APIs are available, with the Developer Portal API recommended for new integrations. Native network-wide discovery, multi-CA inventory, approval workflows, custom request forms, and fleet-wide RBAC are not provided. The service runs in the cloud and supports certificate profiles, SCEP, EST, HSM integration, cloud signing, trusted timestamping, and CI/CD signing.