Best Boulder Alternatives in 2026
Updated
20 platforms from public key infrastructure software ranked against Boulder on the same published basis.
- 1Boulder vs EZCA
- 2Boulder vs KeyTalk CKMS
- 3Boulder vs OpenCA PKI
- 4Boulder vs step-ca
- 5Boulder vs XiPKI
- 6Boulder vs Keyfactor Platform
- 8Boulder vs AWS Private Certificate Authority
- 9Boulder vs Sectigo Certificate Manager
- 10Boulder vs SecureW2 Cloud NAC
- 11Boulder vs AppViewX PKIaaS
- 12Boulder vs Entrust Certificate Manager
- 13Boulder vs HashiCorp Nomad
- 14Boulder vs Cloudflare Serverless Registry
- 15Boulder vs SSL.com Certificate Lifecycle Management
- 16Boulder vs DigiCert Private CA
- 17Boulder vs GlobalSign Atlas
- 18Boulder vs Smallstep ZTNA
- 19Boulder vs Microsoft Active Directory
- 20Boulder vs Microsoft Cloud PKI
- 21Boulder vs OpenXPKI
Boulder alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | EZCA | 7.3 | No | $200/mo | Android, API, iOS, Linux, Mac, self-hosted, Web, Windows |
| 2 | KeyTalk CKMS | 7.2 | No | €5/mo | Android, iOS, Linux, Mac, self-hosted, Windows |
| 3 | OpenCA PKI | 7.2 | Free plan | Free | Linux, Mac, self-hosted, Web |
| 4 | step-ca | 7.2 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 5 | XiPKI | 7.1 | Free plan | Free | API, Linux, Mac, self-hosted |
| 6 | Keyfactor Platform | 7.0 | No | — | API, self-hosted, Web |
| 8 | AWS Private Certificate Authority | 6.8 | No | $50/mo | API, Web |
| 9 | Sectigo Certificate Manager | 6.8 | No | $20.83/mo | API, Web |
| 10 | SecureW2 Cloud NAC | 6.8 | No | — | Android, API, iOS, Linux, Mac, Web, Windows |
| 11 | AppViewX PKIaaS | 6.7 | No | — | API, self-hosted, Web |
| 12 | Entrust Certificate Manager | 6.6 | No | — | Android, API, iOS, Linux, self-hosted, Web |
| 13 | HashiCorp Nomad | 6.6 | No | — | API, Linux, Mac, self-hosted, Web, Windows |
| 14 | Cloudflare Serverless Registry | 6.5 | No | — | Linux, Mac, self-hosted, Windows |
| 15 | SSL.com Certificate Lifecycle Management | 6.5 | No | — | API, Web |
| 16 | DigiCert Private CA | 6.4 | No | — | API, Linux, self-hosted, Web |
| 17 | GlobalSign Atlas | 5.9 | No | — | Web |
| 18 | Smallstep ZTNA | 5.8 | No | — | iOS, Linux, Mac, Windows |
| 19 | Microsoft Active Directory | 5.7 | No | $33.58/mo | Windows |
| 20 | Microsoft Cloud PKI | 5.6 | No | $2/mo | Android, iOS, Mac, Windows |
| 21 | OpenXPKI | 5.6 | No | — | Web, Linux |
Make your platform an alternative to Boulder
See the priceThe sponsored alternative slot on this page is labelled Sponsored.
Questions about Boulder alternatives
What is the best alternative to Boulder?
EZCA, number 1 in public key infrastructure software with a score of 7.3 out of 10. The others here: KeyTalk CKMS, OpenCA PKI, step-ca and 16 more.
What is the best free alternative to Boulder?
OpenCA PKI is the best-ranked alternative with a free plan. 3 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.