Essential Auth & SSO Solutions for Small Businesses

A comprehensive authentication platform offering social login, enterprise SSO, and multi-factor authentication out of the box. Its flexible API and pre-built connections make it ideal for small businesses integrating custom applications or standard SaaS tools without heavy infrastructure overhead.

The industry leader in identity management, providing secure access to applications through a unified dashboard. Okta offers scalable SSO, MFA, and lifecycle management, ensuring small businesses can maintain strict security protocols while supporting remote and hybrid workforces effectively.

Leveraging Google's massive ecosystem, this solution allows small businesses to implement passwordless authentication and social sign-in using Google accounts. It integrates seamlessly with Google Workspace, offering high security and ease of use for teams already invested in the Google environment.

Microsoft's cloud-based identity and access management service that enables single sign-on and multifactor authentication. It is particularly advantageous for small businesses using Office 365, providing deep integration with Microsoft apps and third-party SaaS platforms via standard protocols.

A unified identity platform that simplifies access management through a single sign-on experience. OneLogin is known for its straightforward setup and strong support for SAML, OIDC, and SCIM, making it a cost-effective choice for small teams needing reliable enterprise-grade security.

A developer-first authentication library that simplifies login flows for web and mobile applications. Feathr provides a polished, modern UI for social and email logins, allowing small startups to focus on core product development while offloading complex security considerations to the platform.

An open-source alternative to Firebase Auth, offering user management with email, phone, and third-party providers. It is highly favored by small tech teams building modern web apps, as it integrates natively with Supabase's database and storage services for a unified backend experience.

Google's backend service that helps developers secure applications by providing easy-to-implement sign-in functionality. It supports email/password, phone, and social logins, and scales automatically, making it a popular and cost-effective choice for small startups and mobile-first businesses.

Amazon Web Services' identity service that adds user sign-up, sign-in, and access control to web and mobile apps. It scales to millions of users and integrates with other AWS services, offering a robust, pay-as-you-go model suitable for growing small businesses with complex infrastructure needs.

A directory-as-a-service platform that provides single sign-on, device management, and directory access. JumpCloud is uniquely suited for small businesses managing both Mac and Windows devices, offering a unified security layer for cloud resources and on-premises infrastructure alike.

Part of the Zoho ecosystem, this solution offers secure single sign-on for Zoho applications and third-party SaaS tools. It is an excellent choice for small businesses already using Zoho's CRM, Books, or Projects, providing seamless access and reduced password fatigue at a low cost.

An open-source .NET toolkit for building OpenID Connect and OAuth 2.0 servers. It is ideal for small development teams requiring full control over their identity infrastructure, allowing for highly customized authentication flows while maintaining compliance with modern security standards.

A powerful open-source identity and access management solution designed for modern applications and services. Keycloak provides user federation, social login, and fine-grained authorization, offering enterprise features without licensing fees, making it a strong option for technically adept small teams.

A cloud-native API gateway and security platform that integrates identity-aware proxy features. It helps small businesses secure microservices and APIs by enforcing authentication and authorization policies, ensuring that internal and external services are accessed only by authorized users.

An open-source UI-less Identity and Access Management (IAM) platform supporting OIDC, OAuth 2.0, and SAML 2.0. It is lightweight and highly customizable, making it suitable for small developers who need a simple, embeddable authentication backend without the complexity of larger enterprise suites.

Ping Identity's SaaS-based identity platform that provides adaptive authentication and risk-based access controls. It is designed to be easy to deploy for small to mid-sized businesses, offering strong protection against credential theft and unauthorized access with minimal maintenance effort.

A zero-trust service that sits in front of applications to enforce access policies based on identity. It is particularly useful for small businesses hosting internal tools or staging environments, providing SSO integration with major providers without requiring complex server-side authentication logic.

An open-source identity and access management platform that supports a wide range of identity protocols. Gluu offers flexibility for small businesses needing to manage user identities across on-premises and cloud environments, with strong community support and enterprise-grade security features.

An authorization-as-a-service API that complements authentication by managing fine-grained access permissions. While primarily an authorization tool, it integrates with auth providers to help small businesses build scalable, secure access control lists for complex user roles and data relationships.

An open-source alternative to Auth0 focused on providing session management and authentication without vendor lock-in. It is designed for small development teams who want full control over their user data and authentication logic while still leveraging modern, secure standards like JWT and OIDC.