Public Key Infrastructure Software
Alternatives to EZCA
EZCA lets teams run certificate authorities as a cloud service while leaving PKI infrastructure operations to the provider. It issues certificates through ACME, EST, and SCEP, exposes APIs for applications and workflows, and connects with Azure, Entra ID, Intune, Azure Key Vault, and Azure applications. Jamf support, links to existing on-premises CAs, IoT authentication, SIEM export, CRL and OCSP checking, HSM-backed CAs, and no certificate-count limit broaden its certificate-management scope.
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EJBCA EJBCA suits organizations managing internal PKIs or securing industrial, IoT, DevOps, or national eID environments.
From £5,172.08/mo Free plan Open source Web · Windows · macOS · Linux9.2 Visit Specs - 02
KeyTalk CKMS CKMS suits businesses managing digital certificates and keys, including managed service providers serving customers.
From €5/mo Free trial Web · Windows · macOS · Linux8.8 Visit Specs - 03 Let's Encrypt
Let’s Encrypt suits people and organizations worldwide that need certificates for domain-named web, mail, or FTP servers.
Free plan Open source Web · Windows · macOS · Linux8.6 Visit Specs - 04 OpenCA PKI
OpenCA PKI suits teams seeking free, on-premises PKI management and able to meet its software prerequisites.
Free plan Open source Web · Windows · macOS · Linux8.4 Visit Specs - 05
AWS Private Certificate Authority From $50/mo Free trial Web · API8.3 Visit Specs - 06 step-ca
step-ca suits DevOps teams that need a private CA for certificates used by VMs, containers, APIs, databases, Kubernetes pods or people.
Free plan Open source Windows · macOS · Linux · API8.2 Visit Specs - 07
AppViewX PKIaaS Free trial Web · API · Self-hosted8.1 Visit Specs - 08 Boulder
Boulder suits developers experimenting with ACME or working on systems aligned with Let’s Encrypt’s needs.
Free plan Linux · API · Self-hosted8.0 Visit Specs - 09
cert-manager cert-manager suits teams running Kubernetes or OpenShift workloads that need managed certificates for public-facing or internal services.
Free plan Linux · API · Self-hosted8.0 Visit Specs - 10 Dogtag Certificate System Free plan Linux · API · Self-hosted7.9 Visit Specs
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Keyfactor Platform It suits PKI, security, infrastructure, and DevOps teams that need certificate visibility, lifecycle controls, and automation across environments.
Free trial Web · API · Self-hosted7.9 Visit Specs - 12 Entrust Certificate Manager
It suits organizations that need to discover and manage certificates across varied environments and certificate authorities.
Web · Linux · iOS · Android7.7 Visit Specs - 13 OpenXPKI
It suits system administrators, IT operations staff, PKI operators, developers, and integration engineers managing professional PKI environments.
Free plan Web · Linux · API · Self-hosted7.6 Visit Specs - 14
DigiCert Private CA Web · Linux · API · Self-hosted7.4 Visit Specs - 15 XiPKI
XiPKI suits organizations needing self-hosted certificate authority, registration authority, and OCSP services, particularly in critical infrastructure.
Free plan macOS · Linux · API · Self-hosted7.3 Visit Specs - 16 Google Cloud Secret Manager From $0.01/mo Free plan Web7.0 Visit Specs
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Microsoft Cloud PKI From $2/mo Windows · macOS · iOS · Android6.5 Visit Specs - 18 Microsoft Active Directory From $33.58/mo Windows6.4 Visit Specs
- 19 HashiCorp Vault Windows · macOS · Linux6.2 Visit Specs
- 20 CFSSL Windows · macOS · Linux6.1 Visit Specs
- 21 GlobalSign Managed PKI Web5.8 Visit Specs
- 22 SecureW2 Managed PKI Web · Windows · macOS · Linux5.7 Visit Specs
- 23 Sectigo Private PKI Web5.4 Visit Specs
- 24 SSL.com Private Enterprise PKI Web5.3 Visit Specs
- 25 Smallstep Certificate Manager Web5.2 Visit Specs
Choosing instead of EZCA
The main tradeoffs are its paid service and deployment model. There is no free plan; Basic starts at $200 per CA per month, while higher tiers add capacity, support, or isolated infrastructure. EZCA runs across mobile, desktop, server, web, API, and self-hosted platforms. An alternative may fit better if you want free software, customer-controlled PKI, SSH certificate issuance, broader workflow customization, or network access control. Compare required protocols, certificate use cases, identity and device integrations, operational responsibility, and how each product charges.