List of the Top 25 Free Single Sign On Software in 2025

Frontegg is a comprehensive Customer Identity and Access Management (CIAM) platform built for the unique needs of SaaS companies. It eliminates the complexity of authentication, authorization, and user access by giving engineering teams a fast and reliable way to deploy advanced identity features, while also enabling non-technical teams to manage identity without constant developer involvement. For developers, Frontegg provides a low-code integration experience that gets identity up and running in days rather than months. Its SDKs and APIs support popular frameworks and languages, including React, Node.js, and Python, making it easy to embed features like single sign-on (SSO), multi-factor authentication (MFA), passwordless login, and role-based access control (RBAC). Developers can also handle complex SaaS requirements such as multi-tenancy, hierarchical user structures, entitlements, and subscription management with ready-to-use capabilities, avoiding the need to build these features from scratch. Once integrated, Frontegg gives non-technical stakeholders control through a secure, intuitive admin portal. Product teams can manage feature entitlements and experiment with configurations. Infosec teams can enforce compliance policies, manage MFA requirements, and monitor security dashboards. Customer Success can fulfill requests like adding users or connecting an SSO provider instantly, without waiting on engineering. This distribution of ownership reduces bottlenecks and accelerates how fast companies can respond to their customers. Security is at the core of Frontegg. The platform stays aligned with the latest identity standards such as OAuth2, SAML, and OpenID Connect. It provides built-in audit logs, real-time monitoring, and policy enforcement to help organizations meet compliance requirements. By removing the burden of ongoing identity maintenance from developers, Frontegg ensures applications remain secure without slowing down innovation.

Auth0 adopts a contemporary method for managing identity, allowing organizations to ensure secure access to applications for all users. It offers a high degree of customization while remaining both straightforward and adaptable. Handling billions of login transactions every month, Auth0 prioritizes convenience, privacy, and security, enabling customers to concentrate on their innovative efforts. Furthermore, Auth0 facilitates quick integration of authentication and authorization processes across web, mobile, and legacy applications, featuring advanced Fine Grained Authorization (FGA) that expands the capabilities of traditional role-based access control, thereby enhancing security measures overall.

FusionAuth offers powerful Single Sign-On (SSO) functionalities that allow users to log in once and gain access to various applications effortlessly. It is designed to be compliant with industry standards such as SAML v2, OIDC, and OAuth2, making it compatible with numerous systems and identity providers. With versatile deployment options—ranging from on-premises and hybrid setups to fully cloud-based solutions—FusionAuth enables organizations to streamline identity management while maintaining control and security. Its developer-centric API and customizable user interface facilitate seamless integration of SSO throughout your application landscape, enhancing implementation speed and overall user satisfaction.

Password reset tickets are a common issue that troubles both IT teams and end users alike. To maintain productivity, IT departments often prioritize more critical tasks, pushing less urgent issues, such as password resets, further down the queue. If not handled swiftly, password reset tickets can lead to significant costs for organizations. Research indicates that nearly 30 percent of all help desk inquiries stem from forgotten passwords. Large enterprises have reportedly invested over $1 million to manage and resolve issues related to password resets. Regularly updating passwords is a valuable practice that can mitigate the risk of cyberattacks stemming from compromised credentials. To bolster security, experts advise that administrators implement policies mandating regular password changes and establish expiration timelines for passwords. By doing so, organizations can enhance their overall security posture while minimizing the burden on their IT teams.

ADManager Plus is a user-friendly management and reporting solution for Windows Active Directory (AD) that assists both AD administrators and help desk staff in their everyday operations. Featuring a centralized and intuitive web-based interface, this software simplifies complex operations like bulk user account management and the delegation of role-based access to help desk agents. Additionally, it produces an extensive array of AD reports that are crucial for meeting compliance audit requirements. The tool also offers mobile applications, allowing AD professionals to manage user tasks conveniently from their mobile devices while on the move. This flexibility ensures that administrators can maintain productivity and oversight, regardless of their location.

Ensure the security of your users while simplifying their experience. MIRACL Trust delivers a streamlined and secure authentication process that requires just one step, eliminating the hassle of passwords entirely. Traditional multi-factor authentication can be tedious and slow; however, MIRACL offers a faster and more secure alternative. Users can log in in just 2 seconds, with error rates significantly lower than those associated with passwords—down to one-tenth. Instead of passwords, a simple PIN is all that's needed for access. Our advanced cryptographic technology guarantees that users' data remains protected at all times. By prioritizing user experience, MIRACL Trust allows for a straightforward login process and facilitates rapid deployment of your data. With MIRACL, safeguarding your users has never been easier or more efficient.

Enhance the security of your workforce with robust and user-friendly access solutions from Cisco Duo. Our cutting-edge access security framework is meticulously crafted to safeguard every user, device, and application, allowing you to concentrate on your core activities. Enjoy secure access for all users and devices across various environments and locations, ensuring peace of mind through complete device visibility and trust. This SaaS solution seamlessly protects all applications while being straightforward to deploy, scalable, and responsive to emerging threats. Duo's access security is essential for shielding applications from compromised credentials and devices, offering extensive coverage that aids in fulfilling compliance mandates. By integrating smoothly with applications, Duo delivers flexible, user-centric security that is easy to implement and administer. For administrators, users, and IT teams alike, this is a practical solution that benefits everyone involved. Essential features such as multi-factor authentication, dynamic device trust, adaptive authentication, and secure single sign-on play vital roles in your journey towards a zero-trust framework. Each of these components contributes to a comprehensive security strategy that evolves with your organization's needs.

LastPass stands out as a premier provider of password and identity management tools, gaining the trust of both individuals and enterprises across the globe. Each day, millions depend on LastPass to generate, save, oversee, and safeguard their vital credentials, ensuring they remain secure, confidential, and consistently accessible. Thanks to LastPass, users can seamlessly access their personal and professional accounts from any location, at any time, enhancing convenience in their daily lives. This level of accessibility helps users manage their online presence with confidence and ease.

A single platform offers endless opportunities to engage with both your customers and staff. Any application can be made secure with authentication capabilities. Okta enables you to swiftly develop experiences that are both secure and enjoyable. By integrating Okta's Customer ID products, you can assemble the necessary framework to ensure security, scalability, and dependability. Safeguard and empower your employees, contractors, and partners effectively. Okta’s workforce identification solutions ensure that your employees remain protected regardless of their location. You will be equipped with essential tools to streamline cloud transitions and facilitate hybrid work environments. Trusted by organizations worldwide, Okta is committed to safeguarding workforce identities while promoting seamless connectivity across various platforms. This reliability and trust make Okta a go-to choice for businesses aiming to enhance their security infrastructure.

Numerous developers do not realize that an incredibly powerful solution for user management, authentication, and authorization, including the creation of tailored login and signup interfaces, is entirely free and open-source: Keycloak 🤯. While it’s free, the responsibility for its setup and ongoing maintenance falls on you as your application grows, leading to various hurdles we aim to address: Awareness: Many developers and organizations remain in the dark about Keycloak's ability to fulfill all their identity and access management (IAM) needs. Cost: Numerous companies incur hefty expenses with their current Identity as a Service (IDaaS) providers. Maintenance: Firms already utilizing Keycloak often encounter difficulties in managing the related maintenance tasks and ensuring compliance with regulations for sensitive information. Skycloak offers a managed Keycloak solution that delivers enterprise-level identity and access management features without the intricacies of overseeing your own infrastructure. By integrating Keycloak’s powerful capabilities with additional tools and services, Skycloak significantly improves both security and the overall development experience for users. As a result, organizations can focus on their core objectives rather than get bogged down by IAM complexities.

Rublon provides a secure means for your employees to access your organization's servers, networks, and applications. By implementing multi-factor authentication, it simplifies the process of safeguarding your information and adhering to data protection laws like GDPR. Moreover, Rublon can be integrated throughout your organization, facilitating multi-factor authentication (MFA) for a wide range of platforms, including cloud applications, VPNs, servers, workstations, and both on-premise and internal applications. This comprehensive deployment ensures enhanced security across all facets of your digital infrastructure.

miniOrange provides a comprehensive suite of Identity and Access Management (IAM) solutions designed to protect identities in various environments. Their key offerings include: Single Sign-On (SSO): This powerful solution facilitates SSO across web, mobile, and legacy applications, accommodating all Identity Providers (IDPs) and authentication protocols. Multi-Factor Authentication (MFA): miniOrange stands out with its MFA solution that boasts over 15 different methods, such as Push Notifications, OTP verification, Hardware Tokens, and Authenticator Apps. Customer Identity & Access Management (CIAM): Enhance customer security while ensuring an effortless experience for users, as CIAM protects customer privacy and grants easy access to digital assets. User Provisioning: Streamline user management by automatically syncing users from local directories to miniOrange, helping to oversee the User Lifecycle for both employees and customers efficiently. Adaptive Authentication: This innovative approach addresses high-risk situations by assessing risks based on contextual elements and implementing suitable security protocols. Universal Directory: A secure directory service designed to protect sensitive information while allowing for the integration of existing directories into the miniOrange ecosystem. Together, these solutions empower organizations to maintain robust security while optimizing user experiences across all platforms.

It simplifies access for both employees and students to the applications necessary for their learning or work tasks. The ability for users to reset their passwords independently minimizes reliance on IT support. Additionally, it enhances cybersecurity measures by safeguarding user accounts from potential hacking attempts and defending against ransomware and phishing attacks. This overall approach not only streamlines processes but also instills greater confidence in the digital security framework.

Discover the premier authentication platform that provides seamless login capabilities from virtually any location and at any moment, utilizing multiple methods such as facial recognition, fingerprint scanning, palm identification, and other supported modalities. Authx prioritizes secure, intelligent, and sometimes extraordinary authentication, offering you unrestricted access to any system or application while enabling you to change your preferred login method at your discretion. Engineered for both security and scalability, Authx is also exceptionally user-friendly—simply register once and enjoy effortless access across all platforms. Benefit from Authx's groundbreaking features that enhance your efficiency while maintaining secure authentication practices. The platform is highly dependable, backed by expert support available 24/7. In addition, Authx Mobile serves both iOS and Android users, allowing for rapid authentication via push notifications sent directly to your smartphone. Whether you favor facial, fingerprint, or palm recognition for logging in, Authx Mobile supports biometric authentication, enabling you to access your applications with a simple tap of your access card or through Bluetooth Low Energy (BLE) technology. By merging advanced security measures with ease of use, Authx stands out as an essential asset for contemporary authentication solutions, ensuring that you can securely manage your access wherever you are. It's a game-changer for anyone looking to streamline their digital interactions efficiently.

Safeguard vital organizational information and improve employee productivity through OneLogin, a dependable identity and access management (IAM) platform designed specifically for modern enterprises. This solution is engineered to enhance security within organizations while simplifying the login experience, making it a perfect fit for businesses looking to adopt security protocols with ease. OneLogin offers an array of highly-rated features, such as single sign-on (SSO), a centralized user directory, user provisioning, adaptive authentication, mobile identity management, compliance reporting, and more. Utilizing these capabilities, organizations can achieve a balance of security and user accessibility. As the landscape of digital security continues to evolve, OneLogin emerges as a robust solution to address the growing demands and challenges faced by companies today. Furthermore, its user-friendly interface and comprehensive support further solidify its position as an essential tool for businesses striving for both protection and efficiency.

Aerobase serves as an open-source solution tailored for Identity and Access Management (IAM), emphasizing critical elements like identity federation, single sign-on (SSO), adaptive authentication, access control, account management, identity provisioning, and the protection of APIs and microservices while adhering to privacy regulations. This guide aims to help you kick off your experience with Aerobase by outlining the necessary steps for server installation and the use of the default database, but it does not delve into advanced deployment options. To gain a deeper understanding of the full range of features and configuration options available, it is advisable to consult the supplementary reference materials provided. By exploring these additional resources, you will significantly broaden your grasp of Aerobase's functionalities and potential applications. Engaging with these materials will equip you with the knowledge necessary for maximizing your use of the platform.

Descope serves as a CIAM platform designed specifically for developers and IT teams. With our intuitive no-code workflow builder and SDKs, customers can effortlessly design seamless and secure user journey flows for every interaction. By taking care of authentication methods, session management, and risk management, Descope empowers developers to focus more on their primary app projects. The platform simplifies the management of users, tenants, RBAC, SCIM provisioning, and identity federation, ensuring a hassle-free experience. Through Descope, customers can enhance user experience with passwordless authentication, bolster security with risk-based MFA, and unify user identities across all applications used in business, ultimately creating a more streamlined operational environment. This comprehensive approach not only improves security but also fosters greater user satisfaction and trust.

Authenticating users is one of the most critical and high-impact moments in your customers' journey. With Kinde, you can take complete control. We give you the power to manage user authorization with passwordless authentication, social logins, and enterprise SSO. You can also support your customers' branding with custom domains and a fully customizable UI, even by uploading your own designs. For complex requirements, our powerful workflows let you run your own code during the authentication process. You can easily organize all your business customers using organizations, making it simple to segment them and fine-tune their authentication experience to their unique needs. Kinde also lets you monetize your ideas faster with robust billing tools. You can effortlessly set up subscription plans and start collecting revenue. Kinde's flexible system is built to support any business model—B2C, B2B, or B2B2C—and its powerful organization management and flexible billing logic will scale with your business and your customers.

Univention Corporate Server (UCS) serves as an open integration platform that provides a centralized Identity and Access Management (IAM) system with Nubus through a user-friendly web portal. This portal features Single Sign-On capabilities, along with an integrated IAM system and packaged integrations that streamline the user experience. The App Center is stocked with enterprise applications, while seamless integration with Active Directory enhances functionality. UCS serves as a comprehensive platform to oversee your entire IT infrastructure, whether it exists on-premises, in the cloud, or in a hybrid setup. Nubus plays a pivotal role as the core IAM solution, efficiently managing identities, roles, and groups. Users benefit from an integrated portal that supports Single Sign-On (SSO) and self-service functionalities, granting them access to a wide array of applications and IT services. The deployment of applications is made simple and efficient through readily available integration packages and software. Designed to manage diverse and distributed IT environments, UCS supports an array of operating systems, including Windows, Mac OS, and Linux. To explore UCS further, you can download the complimentary UCS Core Edition directly from our website. This allows users to experience firsthand the robust capabilities of UCS for managing complex IT landscapes.

AD360 is a comprehensive identity management solution that oversees user identities, regulates resource access, enforces security measures, and guarantees compliance with regulations. With its user-friendly interface, AD360 simplifies the execution of all IAM tasks. This solution is compatible with Windows Active Directory, Exchange Servers, and Office 365, providing a versatile platform for managing identities. Users can select from various modules tailored to their needs, facilitating the resolution of IAM challenges across hybrid, on-premises, and cloud environments. From a single console, you can efficiently provision, modify, and deprovision accounts and mailboxes for numerous users simultaneously. This capability extends to managing accounts across Exchange servers, Office 365, and G Suite. Additionally, the platform supports bulk provisioning of user accounts by utilizing customizable templates for user creation and allows for easy data import from CSV files, making the process even more streamlined. Overall, AD360 is designed to enhance productivity and security in identity management.

PropelAuth provides a smooth integration experience along with user-friendly APIs designed specifically for developers, while also incorporating built-in user management features beneficial for teams engaging directly with customers. It also offers critical data insights that cater to the needs of product managers and executives. At the core of PropelAuth lies the conviction that a top-notch authentication solution should seamlessly adapt to your requirements. We furnish you with the necessary tools from the outset, empowering you to craft secure and user-friendly experiences. As you embark on the journey of onboarding users, you will likely face a detailed set of tasks and specifications. PropelAuth recognizes organizations as vital components, enabling you to leverage our user interfaces for a swift setup or to design personalized solutions through our APIs. You have the flexibility to begin with our predefined roles or to create custom ones tailored to your needs. Additionally, we streamline the process of updating existing user information as changes arise. The integration with identity providers like Okta and Azure AD is simplified, and comprehensive guides are provided to assist users in setting up and testing their configurations. You can also adjust session durations for each organization, enforce multi-factor authentication, and explore many more features. By effectively handling the intricacies of identity management, we give you the freedom to concentrate on what is truly significant. PropelAuth not only makes authentication effortless but also drives your operational productivity to new heights, ultimately allowing you to enhance user satisfaction.

Deploy enterprise single sign-on swiftly with SSOReady, which effortlessly connects to the identity services preferred by your clients. Once you set up SSOReady, you'll instantly connect with all leading identity providers. By making just two API calls, you can activate multi-tenant SSO functionality while still leveraging your current technology infrastructure. Users can be easily provisioned or de-provisioned through a single, cohesive API that works seamlessly with your customers' identity platforms. Functioning solely as an authentication middleware, SSOReady does not take ownership of your users and avoids tying you to any particular technology, thereby ensuring a more straightforward onboarding experience. This approach motivates us to foster your long-term loyalty by making it simpler for you to change providers if necessary. SSOReady enhances the integration process by requiring just a user redirect to a specific URL. Furthermore, its SDKs automatically generate this URL, allowing user redirection through any compatible method within your tech environment, which significantly boosts flexibility and usability. Ultimately, SSOReady not only streamlines your authentication procedures but also preserves your control and adaptability, paving the way for a more efficient user management experience. With its user-friendly design and robust capabilities, SSOReady stands out as an ideal solution for modern enterprises seeking efficient identity management.

Zoho Directory is a cloud-based identity and access management solution that aims to simplify the processes of authentication and authorization, while also enhancing user management. The platform features Single Sign-On (SSO), which enables employees to access various applications using just one set of credentials, thereby improving both security and convenience for users. Additionally, it incorporates Multi-Factor Authentication, which provides an extra layer of security to protect against unauthorized access. Device authentication further ensures secure access to both applications and devices, allowing employees to utilize the same credentials across all platforms. Moreover, Zoho Directory boasts powerful provisioning capabilities that empower IT administrators to create and manage user profiles for diverse applications directly from the platform, significantly reducing the time needed for repetitive administrative tasks. The ability to integrate with existing directories, such as Microsoft Active Directory or Azure AD, enhances its usability and flexibility, making it a comprehensive solution for organizations looking to streamline their identity management processes. Thus, Zoho Directory stands out as a robust tool for organizations aiming to improve their identity management efficiency.

Authentik functions as an open-source identity provider, streamlining all aspects of identity management into one cohesive platform, thereby serving as an alternative to services such as Okta, Active Directory, and Auth0. Authentik Security operates with a public benefit ethos, dedicated to promoting and advancing the open-source movement. By choosing a self-hosted, open-source identity provider, you prioritize security and retain authority over your most sensitive data. With authentik, the need to rely on third-party services for identity management is removed, providing you with enhanced peace of mind. You can effortlessly integrate authentik into your current infrastructure, customizing it to fulfill a variety of needs. Our robust APIs and fully customizable policies enable you to effectively automate workflows, increasing efficiency. Facilitating deployment and scaling is made simple through our prebuilt templates, which are compatible with Kubernetes, Terraform, and Docker Compose. This approach allows you to eliminate reliance on external services for critical infrastructure while protecting your confidential information from exposure to the public internet. You can leverage our pre-built workflows or choose to adjust every aspect of the authentication process with flexible templates, infrastructure as code, and comprehensive APIs, ensuring a tailored experience that fits your specific requirements. This adaptability not only allows you to customize authentik for your organization's unique demands but also significantly strengthens your security protocols in the process. Overall, authentik presents a powerful solution for organizations aiming to take full control of their identity management while fortifying their data protection strategies.

Authelia is an open-source server and portal focused on authentication and authorization, effectively overseeing identity management and access control to bolster information security with features like multi-factor authentication and single sign-on, all accessible through a web interface. It is specifically crafted to integrate seamlessly with widely-used reverse proxies. With a lightweight container size of less than 20 megabytes and typical memory usage under 30 megabytes, it is recognized as one of the most efficient solutions available. Built with Go and React, it executes authorization policies and backend processes in milliseconds, and its login portal boasts impressively quick loading times of just 100 milliseconds, positioning it among the fastest options on the market. Despite the high energy consumption often associated with processors, Authelia maintains an incredibly low idle power consumption that is nearly undetectable, while its active usage in small business environments typically remains below 1%, ensuring minimal impact on energy resources (excluding the password hashing process). The design team prioritizes security at every stage of development, instilling confidence in users regarding the management of their data. This dedication to both efficiency and security renders Authelia an attractive option for organizations in search of comprehensive identity management solutions. Additionally, its user-friendly interface and robust feature set further enhance its appeal in the competitive landscape of authentication solutions.