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12 Best PKI Software Shortlist

I've dug deep into the world of PKI software, evaluating each tool's ability to tackle your security challenges.

  1. HashiCorp Vault - Best for automated security management, safeguarding sensitive data with ease
  2. PrimeKey EJBCA® Enterprise - Best for flexible deployment, offering customization to suit diverse needs
  3. OpenXPKI - Best open-source solution, enabling tailor-made security architecture at zero cost
  4. Ubisecure Certificate Authority - Best for digital identity management, providing robust identity proofing and lifecycle management
  5. KeyTalk - Best for scalable security, ensuring powerful encryption across countless devices
  6. Keycloak - Best for seamless integration, offering out-of-the-box support for multiple protocols
  7. DigiCert PKI Platform - Best for lifecycle management, streamlining certificate issuance and renewal
  8. GlobalSign PKI - Best for enterprise-level protection, featuring high volume issuance and automated enrollment
  9. GoDaddy PKI Platform - Best for reliability, backed by a globally recognized and trusted brand
  10. EJBCA (Enterprise JavaBeans Certificate Authority) - Best for interoperability, supporting all major protocols and hardware
  11. Venafi - Best for automation, offering zero-touch issuance and renewal of certificates
  12. Microsoft Active Directory Certificate Services (AD CS) - Best for Windows-centric environments, providing a fully integrated PKI solution within the Microsoft ecosystem

As someone who has managed and navigated the intricate world of SSL certificates, I understand the complexities and challenges that come with maintaining a secure online presence. Managed PKI software can be your lifesaver in this environment.

The solutions I'll be introducing to you offer a robust mix of functionality, including managing SSL and private certificates, service provider validation, SSH and VPN provisioning, and even the much sought-after passwordless authentication. In my experience, a carefully chosen PKI tool significantly streamlines security management, allowing you to focus on your core business operations. And trust me, once you've experienced the difference, you'll wonder how you ever managed without it.

What Is a PKI Software?

Public Key Infrastructure (PKI) software forms the backbone of secure digital communication, providing a framework for creating, distributing, managing, and revoking digital certificates. These certificates validate the identity of individuals, systems, or devices on a network, ensuring only authorized parties can access sensitive information.

Whether you are working on-premises or in the cloud, such software automates the provisioning and validation of digital certificates, significantly reducing the vulnerabilities associated with manual certificate management. By utilizing a solution like AWS Certificate Manager or any of the other PKI management tools, you can rest assured that your certs are handled securely, mitigating risks such as downtime and outages.

They can efficiently address workload-specific needs and tackle potential crypto-related issues. Cloud-based PKI tools, in particular, offer a level of convenience and flexibility, eliminating the hassles of traditional on-premises IAM management.

Overviews of the 12 Best PKI Software

1. HashiCorp Vault - Best for automated security management, safeguarding sensitive data with ease

Example of writing a secret to HashiCorp Vault PKI software
Here is an example of writing a secret to HashiCorp Vault. Secrets are always encrypted and written to the backend storage.

HashiCorp Vault takes charge of your digital security, providing a comprehensive suite for identity-based access and safeguarding sensitive data across various systems. The tool impressively automates the management of secrets, encryption keys, and certificates.

Why I Picked HashiCorp Vault:

I chose HashiCorp Vault due to its commitment to security automation. In the dynamic landscape of digital security, Vault excels at streamlining the process and reducing manual oversight. The tool's remarkable focus on automation provides a formidable shield for sensitive data.

Hence, I believe HashiCorp Vault truly stands out as the best choice for businesses needing to handle automated security management.

Standout Features & Integrations:

Vault’s dynamic secrets feature reduces the risk of unwanted data exposure by creating secrets on demand that get revoked after use. Its encryption as a service module allows users to encrypt data without dealing with the complexities of key management.

As for integrations, Vault plugs into your existing infrastructure seamlessly. It works well with popular platforms like AWS, Google Cloud, and Azure, providing extensive coverage.


Pricing upon request


  • Robust and flexible key and secrets management
  • Wide array of integrations for versatile deployment
  • Dynamic secrets ensure maximum data safety


  • Steep learning curve for new users
  • Detailed documentation may be overwhelming
  • Pricing structure is not transparently listed

2. PrimeKey EJBCA® Enterprise - Best for flexible deployment, offering customization to suit diverse needs

PrimeKey EJBCA dashboard
Here is a sample image of the PrimeKey EJBCA dashboard on Graylog.

PrimeKey EJBCA® Enterprise serves as a robust Certificate Authority, ensuring secure and flexible management of digital identities. The software is tailored to meet the needs of organizations of all scales, providing a range of customizable options to match the complexity of varying IT environments.

Why I Picked PrimeKey EJBCA® Enterprise:

I selected PrimeKey EJBCA® Enterprise for its adaptability. In a tech landscape teeming with varying needs and use cases, this PKI solution's customizable nature offers a clear advantage. Its ability to mold itself to the unique requirements of an organization makes it the best for those seeking a flexible deployment option.

Standout Features & Integrations:

PrimeKey EJBCA® Enterprise shines with its powerful certificate management system and adaptable workflows. It supports multiple Certificate Authority (CA) hierarchies and a wide array of certificate profiles. On the integration front, it syncs well with HSMs from vendors like Thales and Utimaco, and it offers a REST API for seamless integration with existing IT infrastructure.


Pricing upon request


  • Versatile and customizable to suit unique requirements
  • Comprehensive certificate and workflow management
  • Robust integration options, including REST API


  • Can be complex for novice users
  • Support might be required for initial setup
  • Transparent pricing information is not available

3. OpenXPKI - Best open-source solution, enabling tailor-made security architecture at zero cost

OpenXPKI PKI software
OpenXPKI's web frontend allows access to the workflow catalog, allowing users to instantiate new workflows and work on existing workflow instances.

OpenXPKI is a powerful open-source PKI solution designed for flexibility and security. The tool brings to the table a scalable and enterprise-ready architecture that allows you to mold a security solution that aligns with your unique needs.

Why I Picked OpenXPKI:

OpenXPKI caught my attention for its open-source nature. This factor not only makes it a cost-effective option but also enables extensive customization and scalability. It's the diversity in design and adaptability that sets OpenXPKI apart, earning it the title of the best open-source solution for tailoring security architecture.

Standout Features & Integrations:

OpenXPKI offers a feature-rich environment with customizable workflows, support for multiple CA hierarchies, and sophisticated token handling. The tool also provides an extensive API for integration and automation, and it plays well with a range of databases including MySQL, Oracle, and PostgreSQL.


Free to use


  • Open-source and free to use
  • Extensive customization and scalability options
  • Solid API for integrations and automation


  • The learning curve may be steep for beginners
  • Requires more setup compared to commercial PKI solutions
  • Absence of dedicated customer support

4. Ubisecure Certificate Authority - Best for digital identity management, providing robust identity proofing and lifecycle management

Ubisecure's customer-friendly multi-factor authentication (MFA)
With Ubisecure's customer-friendly multi-factor authentication (MFA) for passwordless access to web, mobile, device, and legacy applications.

Ubisecure Certificate Authority is a cutting-edge tool that goes beyond the traditional role of a PKI solution. Not only does it manage digital certificates, but it also shines in its comprehensive approach to identity lifecycle management.

Why I Picked Ubisecure Certificate Authority:

I was drawn to Ubisecure for its robust and comprehensive feature set, particularly around digital identity management. Unlike other tools on this list, Ubisecure presents a broader approach, ensuring all aspects of the digital identity lifecycle are catered to. This makes it stand out, leading me to designate it as the best for digital identity management.

Standout Features & Integrations:

Ubisecure Certificate Authority stands out with its identity-proofing capabilities, identity lifecycle management, and multi-factor authentication support. This tool seamlessly integrates with existing IT environments and supports numerous protocols such as SAML, OAuth, and OpenID Connect, extending its reach and applicability.


From $10/user/month (billed annually)


  • Comprehensive approach to identity management
  • Robust integration capabilities
  • Strong support for multi-factor authentication


  • Pricing might be steep for small businesses
  • The user interface may be complex for beginners
  • Limited third-party reviews available for the software

5. KeyTalk - Best for scalable security, ensuring powerful encryption across countless devices

Client app feature of KeyTalk PKI software
The KeyTalk client app enables native secure email encryption, as well as access to Cloud, Hybrid, and Local network environments, which have been protected using enforced client certificate authentication.

KeyTalk serves as an effective PKI solution designed to secure and automate the management of your digital certificates across multiple devices. KeyTalk's strength lies in its scalability, making it ideal for organizations dealing with a large number of devices, hence being the best for scalable security.

Why I Picked KeyTalk:

I chose KeyTalk because of its impressive ability to scale and manage certificate lifecycles across countless devices, setting it apart from other PKI solutions on the list. In terms of securing numerous devices, I believe KeyTalk comes out on top, hence I deem it the best for scalable security.

Standout Features & Integrations:

KeyTalk's foremost features include automatic certificate renewal, revocation, and installation across various devices. It also excels in supporting different certificate types like SSL/TLS, code signing, and user certificates. Notably, KeyTalk integrates with a broad range of server systems, software applications, and network components, amplifying its usability across diverse IT infrastructures.


From $12/user/month (billed annually)


  • Exceptional scalability for device management
  • Broad range of certificate support
  • Extensive system and application integrations


  • Could be overkill for smaller businesses
  • Interface might be challenging for novice users
  • Premium price point may not fit all budgets

6. Keycloak - Best for seamless integration, offering out-of-the-box support for multiple protocols

Keycloak PKI software
Here is a screenshot of Keycloak software where users can create an account on the local host.

Keycloak is an open-source Identity and Access Management solution that can authenticate users with existing LDAP or Active Directory credentials. Its edge lies in providing out-of-the-box support for multiple protocols, which supports seamless integration and makes it the best choice for this specific need.

Why I Picked Keycloak:

Keycloak earned its place on this list for its strong integrative capabilities, particularly its native support for multiple protocols. I selected it as the best for seamless integration as it ensures a simplified and efficient setup across diverse systems, which sets it apart in the marketplace.

Standout Features & Integrations:

Keycloak excels with features like Single-Sign-On (SSO), identity brokering, and its built-in support for multiple protocols such as OpenID Connect, SAML 2.0, and LDAP. Keycloak can also integrate smoothly with various applications and services, including microservices, monoliths, and cloud services, making it versatile for many infrastructural setups.


Since Keycloak is an open-source tool, it's free of charge. Any costs would come from optional services like support or consulting.


  • Support for multiple protocols enables seamless integration
  • Strong feature set including SSO and identity brokering
  • Versatile integration with various types of applications and services


  • May require technical expertise for setup and management
  • Support is reliant on community or paid services
  • Updates and new features are dependent on the open-source community

7. DigiCert PKI Platform - Best for lifecycle management, streamlining certificate issuance and renewal

DigiCert PKI software certificate inspector
Here is a screenshot of Digicert's dashboard for certificate inspectors.

DigiCert PKI Platform provides scalable and reliable high-assurance certificate solutions. It shines in lifecycle management by simplifying and automating the processes of issuing, renewing, and managing digital certificates, making it the best choice for these tasks.

Why I Picked DigiCert PKI Platform:

I chose the DigiCert PKI Platform due to its comprehensive approach to certificate lifecycle management, which makes it stand out among other tools. Its automation of intricate certificate-related processes supports why it's the best for lifecycle management, ensuring certificate operations remain efficient and streamlined.

Standout Features & Integrations:

The platform's notable features include automated certificate issuance and renewal, intuitive UI for easy management, and robust APIs for integration. DigiCert PKI Platform also offers key integrations with widely used systems like Microsoft Active Directory, Microsoft Autoenrollment, and other IT infrastructure components, extending its certificate lifecycle management capabilities into these environments.


DigiCert PKI Platform's pricing is based on a variety of factors and therefore is only available upon request.


  • Streamlines certificate issuance and renewal processes
  • Robust APIs enable integration with various systems
  • Offers a user-friendly management interface


  • Pricing structure can be complex and is not directly available
  • Some users may find the platform’s extensive features overwhelming
  • Setup and configuration can be time-consuming

8. GlobalSign PKI - Best for enterprise-level protection, featuring high volume issuance and automated enrollment

Managed SSL home screen in GlobalSign’s certificate management platform
Here is an example image for managed SSL home screen in GlobalSign’s certificate management platform.

GlobalSign PKI is a platform designed to secure organizations' digital identities at scale. It excels in issuing large volumes of certificates and automated enrollment, making it a top choice for businesses seeking robust, enterprise-level protection.

Why I Picked GlobalSign PKI:

When selecting tools for this list, I evaluated each based on their distinctive qualities. GlobalSign PKI emerged due to its capacity to handle high-volume issuance and automated enrollment, which are critical in enterprise-level protection. This robust capability justifies why I believe it is the best for businesses that require extensive protection.

Standout Features & Integrations:

GlobalSign PKI has a robust set of features, including certificate lifecycle management, automated enrollment, and support for multiple certificate types. It offers integrations with Microsoft Active Directory and other IT infrastructure systems, ensuring wide coverage of protection across different organizational applications.


GlobalSign PKI’s pricing is not publicly disclosed, therefore it is available upon request.


  • Provides extensive enterprise-level protection
  • Handles high-volume certificate issuance efficiently
  • Offers automated enrollment for ease of use


  • Lack of transparent pricing can be challenging for potential users
  • Some customers have reported slow customer service response times
  • The platform may have a steep learning curve for those new to PKI solutions

9. GoDaddy PKI Platform - Best for reliability, backed by a globally recognized and trusted brand

GoDaddy PKI software domain manager
Here is a screenshot of GoDaddy's homepage for domain search.

GoDaddy PKI Platform is a comprehensive security solution that helps organizations manage digital certificates for their systems and services. GoDaddy, as a globally recognized brand, ensures that its PKI platform is backed by a level of trust and reliability that's hard to beat.

Why I Picked GoDaddy PKI Platform:

In choosing tools for this list, GoDaddy PKI Platform stood out for its association with a highly trusted brand in the domain and hosting industry. Its global recognition provides a level of reliability, which was the deciding factor in determining it as the best for reliability among the lot.

Standout Features & Integrations:

GoDaddy PKI Platform comes with robust features, including management of SSL/TLS certificates and multiple domain support. Its integrations are noteworthy too, featuring support for various servers and systems like Apache, Microsoft servers, and more.


The pricing for GoDaddy PKI Platform starts from $89.99 per year per user, which translates to around $7.50/user/month (billed annually).


  • Backed by a globally recognized and trusted brand
  • Supports the management of multiple domain certificates
  • Good integration with various servers and systems


  • The pricing structure may be complicated for some
  • Support services have received mixed reviews
  • Some advanced features may only be available at higher pricing tiers

10. EJBCA (Enterprise JavaBeans Certificate Authority) - Best for interoperability, supporting all major protocols and hardware

EJBCA PKI software web dashboard
Here is a screenshot of the EJBCA web dashboard.

EJBCA is a robust, platform-agnostic PKI solution, designed to enable seamless issuance and management of digital certificates. Given its ability to support all major protocols and hardware, EJBCA is best for interoperability in diverse IT environments.

Why I Picked EJBCA:

I selected EJBCA for this list because it stands apart with its broad interoperability. Its compatibility with major protocols and hardware sets it apart and makes it an ideal choice for diverse IT ecosystems. Therefore, I judged it to be the best for interoperability.

Standout Features & Integrations:

EJBCA boasts a rich feature set, including extensive certificate life cycle management, flexible integrations, and support for hardware security modules. It integrates with a variety of platforms and devices, reinforcing its standing as a versatile, interoperable PKI solution.


EJBCA offers a Community version which is free but for pricing of its Enterprise version, it is upon request.


  • High interoperability with major protocols and hardware
  • Robust certificate life cycle management
  • Extensive platform and device integrations


  • Enterprise version pricing is not publicly available
  • May be complex to set up for those unfamiliar with Java-based applications
  • Community support may not be as responsive or comprehensive as Enterprise support

11. Venafi - Best for automation, offering zero-touch issuance and renewal of certificates

Venafi PKI software dashboard
Here is a screenshot of Venafi's dashboard.

Venafi is a distinguished PKI platform that centralizes and automates the lifecycle of digital certificates. Because of its automation features, particularly zero-touch issuance, and renewal of certificates, Venafi is best suited for those who seek streamlined certificate management.

Why I Picked Venafi:

When I was determining which PKI platform to include on this list, Venafi stood out due to its advanced automation capabilities. Its feature of zero-touch issuance and renewal of certificates distinguishes it from the crowd, leading to my decision that it is best for automation.

Standout Features & Integrations:

Venafi stands out with its advanced automation for the lifecycle of certificates, including issuance, renewal, and revocation. In addition to this, it integrates with leading IT systems like cloud providers, DevOps tools, and more, making it a highly adaptable platform.


Venafi operates on a “Pricing upon request” model, requiring potential users to contact them for a quote.


  • Advanced automation of certificate lifecycle
  • Integrates with leading IT systems
  • Provides visibility into all machine identities and their associated risks


  • Pricing is not transparent and requires a custom quote
  • Can be complex to set up and manage without adequate training
  • Customer support may be slow during off-peak hours

12. Microsoft Active Directory Certificate Services (AD CS) - Best for Windows-centric environments, providing a fully integrated PKI solution within the Microsoft ecosystem

Microsoft Active Directory Certificate Services with its certificate templates console
Take a look at Microsoft Active Directory Certificate Services with its certificate templates console. The screenshot shows the duplicate template feature.

Microsoft Active Directory Certificate Services (AD CS) is a role in Windows Server that allows the creation of a fully functional public key infrastructure (PKI). Being tightly integrated with the Microsoft ecosystem, it becomes the go-to PKI solution for Windows-centric environments.

Why I Picked Microsoft Active Directory Certificate Services (AD CS):

In the process of selecting PKI tools, AD CS caught my attention due to its seamless integration within the Microsoft ecosystem. This integration, I believe, positions it as the best choice for Windows-centric environments, where it can provide a streamlined and native PKI solution.

Standout Features & Integrations:

AD CS features include the ability to customize certificate contents and extensions, and it supports automated certificate issuance through templates. Its biggest strength is its integration with Microsoft Active Directory, allowing for simple deployment and management of certificates within a Windows environment.


Microsoft Active Directory Certificate Services is included in the Windows Server license. Pricing for Windows Server starts from $972 (billed annually).


  • Seamless integration within the Microsoft ecosystem
  • Customizable certificate contents and extensions
  • Automated certificate issuance through templates


  • Limited to Windows environments
  • Can be complex to set up without a good understanding of PKI principles
  • Requires a Windows Server license, which can be pricey for smaller organizations

Other PKI Software

Below is a list of additional PKI software that I shortlisted, but did not make it to the top 12. Definitely worth checking them out.

  1. FreeIPA - Good for identity management in Linux/Unix environments
  2. Dogtag Certificate System - Good for organizations seeking open-source PKI solutions
  3. OpenSSL - Good for developers needing a robust, versatile cryptography library
  4. OpenCA PKI - Good for academic and research environments with a need for a flexible PKI infrastructure
  5. Sectona - Good for businesses looking for privileged access security solutions
  6. GnuPG - Good for those requiring free encryption software compliant with OpenPGP standards
  7. RSA Certificate Manager - Good for enterprise-grade lifecycle management of digital certificates
  8. keyfactor Command - Good for managing large-scale, complex certificate infrastructures
  9. GlobalSign IoT Identity Platform - Good for IoT device manufacturers needing scalable identity management solutions
  10. SecureW2 - Good for networks requiring strong Wi-Fi security and onboarding solutions
  11. SafeNet Trusted Access - Good for organizations in need of intelligent access management and multifactor authentication solutions

Selection Criteria for PKI Software

In my journey to find the best public key infrastructure (PKI) software, I evaluated dozens of tools. My focus was on core functionality, key features, and usability, areas that are particularly critical in the world of PKI management. Let's take a closer look at the specifics.

Core Functionality

PKI software must deliver on:

  • Certificate Issuance: It should provide easy certificate issuance for diverse requirements such as SSL/TLS, email, code signing, and user/device authentication.
  • Certificate Management: The ability to track, renew, and revoke certificates is fundamental.
  • Scalability: Capable of supporting an expanding user base or increase in certificate issuance without compromising performance.

Key Features:

For this software category, the most significant features include:

  • Interoperability: The software must be compatible with different systems, applications, and hardware for smooth operation.
  • Automation: Automatic issuance and renewal of certificates reduce manual effort and associated errors.
  • Role-based Access Control: Allows only authorized individuals to issue and manage certificates.
  • Reporting and Analytics: Provides insights into the status of your certificates and their usage.


In terms of usability, I focused on:

  • User Interface: PKI software should have an intuitive and well-organized interface, especially for managing large volumes of certificates.
  • Onboarding and Support: Given the complexity of PKI, comprehensive documentation, training resources, and responsive support are essential.
  • Integration Capabilities: PKI solutions need to integrate easily with existing systems and workflows, reducing the complexity of implementation.
  • Performance: The software should be able to handle large amounts of certificate management tasks without slowing down or becoming unresponsive.

People Also Ask

What are the benefits of using PKI software?

Using PKI software brings numerous advantages:

  1. It enhances security by using cryptographic techniques for data encryption and digital signature creation and verification.
  2. PKI tools streamline certificate lifecycle management, ensuring timely issuance, renewal, and revocation.
  3. The software provides automation, minimizing the risk of manual errors and saving time.
  4. It aids in compliance with regulatory and industry standards by ensuring the secure transmission of sensitive information.
  5. PKI software often comes with robust reporting and analytics features, helping organizations monitor and optimize their PKI setup.

How much does PKI software cost?

The cost of PKI software varies widely depending on the features, scale, and vendor. Pricing models differ as well, with some vendors offering a flat fee for unlimited usage, while others charge on a per-certificate or per-user basis.

What are the pricing models for PKI software?

Common pricing models for PKI software include:

  • Per user or per certificate: Pricing depends on the number of users or certificates.
  • Flat rate: A single fee for unlimited usage.
  • Subscription: Annual or monthly subscription fees, sometimes based on tiers of service.

What is the typical range of pricing for PKI software?

Pricing for PKI software can start as low as $50 per month for smaller solutions and go up to several thousand dollars per year for enterprise-grade software. Some vendors provide custom pricing based on the specific needs of the organization.

Which is the cheapest PKI software?

FreeIPA is among the cheapest PKI solutions as it is open-source and free to use.

Which is the most expensive PKI software?

Tools like RSA Certificate Manager and Venafi, which cater to large enterprises with extensive needs, can be on the higher end of the pricing scale.

Are there any free PKI software options?

Yes, there are free options available, such as FreeIPA, Dogtag Certificate System, OpenSSL, and OpenCA PKI. These are typically open-source solutions that might require more technical expertise to set up and manage.

Are PKI software tools difficult to use?

The difficulty level can vary depending on the tool. Some PKI software has a steep learning curve due to its extensive features and capabilities. However, most modern PKI tools prioritize user experience, offering intuitive interfaces and comprehensive support to aid in user onboarding and ongoing use.

Other Network Security Software Reviews


This article has covered a variety of PKI software solutions, each with its own unique strengths and considerations. Whether you need a tool for a Windows-centric environment, a solution with comprehensive interoperability, or one that offers impressive automation capabilities, there's PKI software to fit your requirements.

Key Takeaways

  1. Understand your needs: The best PKI software for you depends on your specific needs. Are you looking for a tool that integrates seamlessly with your existing infrastructure? Do you require extensive protocol support or a solution with strong automation features? Understanding your own use case is the first step toward making an informed choice.
  2. Consider Usability: The complexity of PKI software varies widely, and it's crucial to choose a solution that matches your team's technical skills. Software with intuitive interfaces and robust support can make the process of managing your PKI much smoother.
  3. Pay attention to Pricing: The cost of PKI software can range from free, open-source solutions to premium, enterprise-grade options. Make sure to understand the pricing model (per user, flat rate, subscription) and consider the long-term value and return on investment when making your decision.

What Do You Think?

While this list aims to cover a range of excellent PKI software, there are undoubtedly other effective tools out there. If you're using a solution that you find valuable and it's not mentioned here, I would love to hear from you. Please feel free to share your suggestions and experiences in the comments below, and perhaps your preferred tool could feature in an updated list in the future.

By Paulo Gardini Miguel

Paulo is the Director of Technology at the rapidly growing media tech company BWZ. Prior to that, he worked as a Software Engineering Manager and then Head Of Technology at Navegg, Latin America’s largest data marketplace, and as Full Stack Engineer at MapLink, which provides geolocation APIs as a service. Paulo draws insight from years of experience serving as an infrastructure architect, team leader, and product developer in rapidly scaling web environments. He’s driven to share his expertise with other technology leaders to help them build great teams, improve performance, optimize resources, and create foundations for scalability.