Authentication · Updated 2026
Quick Verdict
Choose Lucia if you are building a consumer or internal application and want full control over a lightweight, custom auth layer. Choose WorkOS if you are a B2B SaaS company selling to enterprises and need to implement complex, compliant identity integrations like SSO and SCIM.
Lucia is a free, open-source library designed for developers to build and own their authentication logic within their full-stack JavaScript/TypeScript applications. WorkOS is a paid, API-first platform that abstracts away the complexity of enterprise identity protocols like SAML, OIDC, and SCIM. Their core difference is approach: Lucia provides the primitives for custom auth, while WorkOS provides pre-built, compliant integrations for B2B needs. Consequently, their target audiences are distinct: Lucia suits projects prioritizing flexibility and control, whereas WorkOS targets businesses with specific enterprise sales requirements.
Side-by-Side Comparison
| Aspect | Lucia | WorkOS |
|---|---|---|
| Pricing | Free and open-source | Paid platform starting at $99/month |
| Ease of Use | Requires more setup and understanding of auth flows | Simplifies complex protocols with APIs and pre-built UIs |
| Scalability | Scales with your application infrastructure | Built and supported for enterprise-scale traffic and compliance |
| Integrations | Primarily OAuth providers; you build custom logic | Pre-built integrations for IdPs (Okta, Azure AD), directories, and MFA |
| Open Source | Yes | No |
| Best For | Full-stack JS/TS devs wanting a customizable auth library | B2B SaaS companies needing enterprise-ready auth & provisioning |
Choose Lucia if...
Lucia is the better choice when you need a simple, type-safe foundation for authentication (like username/password or OAuth) and want to avoid vendor lock-in or a heavy framework. It's ideal for side projects, startups, or applications where enterprise features like SSO are not a current requirement, and you prefer to manage the auth implementation details yourself.
Choose WorkOS if...
WorkOS is the better choice when your primary goal is to enable enterprise sales by quickly adding secure, compliant SSO (SAML/OIDC), MFA, and directory sync (SCIM). It is the clear choice for B2B SaaS companies that need to meet the security and provisioning demands of large IT departments without building and maintaining complex identity integrations in-house.
Product Details
Lucia
A simple, flexible, and type-safe authentication library for modern JavaScript runtimes.
Pricing
Free
Best For
Developers building full-stack JavaScript/TypeScript applications who want a lightweight, customizable authentication solution without the overhead of a monolithic framework.
Key Features
Pros
- + Extremely lightweight and performant with minimal abstraction
- + Offers unparalleled flexibility and control over the user data model
- + Excellent, well-documented TypeScript support and developer experience
Cons
- - Requires more manual setup and configuration compared to all-in-one services like Auth0 or Supabase Auth
- - Lacks a built-in, pre-styled UI for login/signup flows
- - Smaller community and less third-party tooling than established alternatives
WorkOS
Provides enterprise-ready infrastructure like Single Sign-On (SSO), Multi-Factor Authentication (MFA), and directory sync for B2B SaaS applications.
Pricing
$99/mo
Best For
B2B SaaS companies that need to sell to enterprise customers and require secure, compliant authentication and user provisioning integrations.
Key Features
Pros
- + Drastically reduces development time for enterprise integrations
- + Clean, well-documented API and developer experience
- + Handles the complexity of multiple identity provider protocols
Cons
- - Pricing can become significant at high user volumes
- - Primarily focused on B2B use cases, less ideal for B2C
- - Some advanced features require higher-tier plans