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Venafi vs Let's Encrypt

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

VenafiLet's Encrypt
TypeCLM platformPublic CA (free)
DeploymentSaaS + self-hostedSaaS (ACME)
How it worksCA-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.Issues 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.
Pricing*Enterprise quoteFree
Free tierNoYes
Open source—Boulder (MPL-2.0)
ComplianceFIPS 140-2, SOC 2, Common CriteriaWebTrust, CA/B Forum
Best forLarge regulated estates with many CAsPublic web TLS on anything you can automate

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

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

Bottom line

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

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