x509.systems

← All comparisons

Let's Encrypt vs Venafi

How Let's Encrypt and Venafi differ on deployment, pricing, openness and what each is actually built for.

Let's EncryptVenafi
TypePublic CA (free)CLM platform
DeploymentSaaS (ACME)SaaS + self-hosted
How it worksIssues domain-validated TLS certificates at no cost, exclusively through the ACME protocol. Short 90-day lifetimes force automation, which is the point: renewal is a cron job, not a calendar reminder.CA-agnostic control plane for machine identities: discovers every certificate across the estate, enforces issuance policy, automates renewal and installation, and reports on expiry and crypto-agility. Sits above whichever CAs you already use.
Pricing*FreeEnterprise quote
Free tierYesNo
Open sourceBoulder (MPL-2.0)—
ComplianceWebTrust, CA/B ForumFIPS 140-2, SOC 2, Common Criteria
Best forPublic web TLS on anything you can automateLarge regulated estates with many CAs

Let's Encrypt

  • Free and genuinely unlimited in practice
  • ACME everywhere — client support is universal
  • Short lifetimes push good automation hygiene
  • Domain validation only — no OV or EV
  • No support contract to escalate to

Venafi

  • Deepest policy and governance controls
  • CA-agnostic — no lock-in to one issuer
  • Strong discovery across sprawling estates
  • Expensive, and sold enterprise-first
  • Heavy to deploy and operate

Bottom line

Choose Let's Encrypt for public web tls on anything you can automate. Choose Venafi for large regulated estates with many cas.

* Indicative list pricing (vendor documentation and public pricing pages, August 2026).