Top 5 PropelAuth alternatives for secure authentication in 2026

PropelAuth has carved out a respected niche as a B2B-focused authentication provider, offering pre-built UIs, organization management, SAML SSO, and SCIM provisioning in a managed package. For many early-stage startups, it's a fast path to production-grade auth without building everything from scratch.

But as applications scale and enterprise requirements deepen, teams often find themselves running into PropelAuth's boundaries. Whether it's advanced threat detection, fine-grained authorization beyond RBAC, deeply customizable login flows, or concerns about ecosystem maturity, there are legitimate reasons to evaluate alternatives.

In this guide, we'll explore the top 5 PropelAuth alternatives for 2026, from enterprise-grade platforms to open-source solutions, helping you find the right authentication approach for your application.

Why teams move beyond PropelAuth

Before diving into alternatives, let's identify the common challenges that drive developers to look beyond PropelAuth:

• Enterprise features gated behind higher tiers: PropelAuth's free plan covers the basics, but capabilities like SCIM directory sync, advanced organization controls, and audit logs require upgrading to the $500/month Growth Plus plan. For growing companies, this pricing structure can become a barrier before the features pay for themselves.
• No bot detection or threat monitoring: PropelAuth doesn't offer built-in protection against credential stuffing, brute-force attacks, or suspicious login patterns. You'll need to layer on separate tooling for real-time fraud prevention.
• Limited authorization model: PropelAuth provides role-based access control (RBAC) with custom roles and permissions, but lacks fine-grained, relationship-based authorization. If your application needs Zanzibar-style permission models or contextual access policies, you'll need to build that yourself.
• No feature flags or progressive rollouts: Gating features behind user segments, organizations, or plans requires integrating a separate feature flagging service.
• Smaller ecosystem and community: Compared to more established platforms, PropelAuth has a narrower set of framework SDKs, fewer community resources, and a smaller library of third-party integrations. Teams working outside the React/Next.js/Python ecosystem may find gaps.
• UI customization ceiling: PropelAuth provides polished hosted UIs and a component library, but teams that want full pixel-level control over every authentication screen may find the customization options limiting compared to headless or fully self-hosted solutions.
• Vendor concentration risk: PropelAuth is a smaller, venture-backed company. For enterprise buyers with strict procurement requirements, the company's size and track record may raise questions during vendor evaluation.
• No self-hosted option for the core platform: While PropelAuth recently introduced a "Bring Your Own Auth" self-hosted offering, the core cloud platform cannot be self-hosted. Teams with strict data residency or air-gapped deployment requirements may find this limiting.

1. WorkOS

WorkOS is an enterprise authentication platform built specifically for B2B SaaS applications. It provides AuthKit, a complete authentication solution with pre-built UI components, along with enterprise features like SSO, Directory Sync, and fine-grained authorization.

Key features

• Next.js App Router-focused SDK (@workos-inc/authkit-nextjs).
• AI-powered CLI: Run one command and the CLI handles framework detection, SDK installation, route creation, environment setup, and build validation. Your app goes from zero auth to full AuthKit integration in about two minutes.
• Server-side session validation via HTTP-only cookies, designed for App Router, Server Components, and edge-safe route protection.
• Flexible UI support via APIs and SDKs, with AuthKit as a highly customizable hosted login powered by Radix.
• Enterprise SSO with native SAML and OIDC, configurable by customers through an Admin Portal.
• SCIM provisioning: Automated user provisioning and deprovisioning that enterprises expect. Real-time synchronization with any identity provider (Okta, Azure AD, Google Workspace, and more).
• Tamper-proof audit logs for SOC 2, HIPAA, and GDPR.
• Passkeys, MFA, social logins, magic auth, and more.
• Secure session handling with server-side validation and instant session revocation capabilities.
• Customizable JWT claims: Add custom data to JWT payloads with JWT templates for flexible token customization.
• Radar for suspicious login detection and threat monitoring that alerts you to potential account compromises.
• Fine-grained authorization: Role-based access control with customizable permissions.
• Feature flags: Integrated feature flagging for gradual rollouts.
• First-class multi-tenancy with organization management, member invitations, and role assignment.
• Enterprise SLA and dedicated support.
• Pricing that scales with growth, with $0 for the first 1 million users.

Best for

WorkOS is ideal for B2B SaaS companies that need enterprise-grade authentication without feature gating. Where PropelAuth locks SCIM and advanced controls behind its $500/month tier, WorkOS includes SSO, directory sync, audit logs, and multi-tenancy from the start. If your roadmap includes bot detection, fine-grained authorization, or feature flags alongside your auth stack, WorkOS provides all of these in a single platform.

Trade-offs

If you're a very early-stage startup that only needs basic B2B auth for a handful of organizations, WorkOS may feel like more platform than you need right now. But it means you won't need to migrate when your first enterprise customer asks for SSO, SCIM, and audit logs in the same week.

2. Firebase Authentication

Firebase Authentication is Google's managed authentication service, part of the Firebase platform. It provides strong provider support and deep integration with Google Cloud services. It's a well-established option with a generous free tier, though teams with B2B requirements often find themselves needing the paid Identity Platform upgrade.

Key features

• Multiple auth methods: Email/password, phone, OAuth providers, and anonymous authentication.
• Google ecosystem integration: Deep integration with Google Cloud Platform, Firestore, and other Google services.
• Security rules: Client-side security rules that work with Firestore and Realtime Database.
• Identity Platform tier: Upgraded paid tier adds SAML SSO and multi-tenancy support.
• Generous free tier: Suitable for getting started without upfront costs.
• Official JavaScript SDK: Compatible with Next.js applications.
• Established track record: One of the most widely deployed auth services, backed by Google's infrastructure and reliability.

Best for

Firebase Authentication works for developers already using Firebase or Google Cloud Platform who want authentication tightly integrated with Google services. It's a natural fit for consumer-facing applications and teams already invested in the Google ecosystem. If you're building on GCP and want a battle-tested auth service with minimal setup, Firebase is a practical choice.

Trade-offs

• Enterprise features require paid upgrade: SAML SSO and multi-tenancy are only available on the Identity Platform tier, which can become expensive at scale.
• Vendor lock-in: Migrating away from Firebase is complex. Architecture decisions made early around Firestore and security rules are hard to unwind.
• No Next.js App Router SDK: No official App Router integration. You'll need to implement token handling and refresh logic manually.
• No SCIM provisioning: Enterprise user lifecycle management is not supported.
• No pre-built UI: The Firebase UI library is basic and difficult to customize deeply.
• No audit logging: Compliance-grade activity tracking requires building your own solution.
• No bot detection or fraud prevention: Protecting against credential stuffing and suspicious login patterns requires separate tooling.

3. Supabase Auth

Supabase Auth is part of the broader Supabase platform, providing authentication alongside a PostgreSQL database, storage, and real-time subscriptions. It's a popular choice for developers who want an integrated backend platform and are building applications that benefit from combining auth with a managed database.

Key features

• Multiple auth methods: Email/password, magic links, OAuth providers, phone authentication, and passkeys.
• Row-level security: Database-level security policies that integrate directly with authenticated user identity.
• Social providers: Pre-configured OAuth integrations with popular providers out of the box.
• Open source: Self-hostable for compliance or data residency requirements.
• Integrated platform: Works seamlessly with Supabase database, storage, and edge functions.
• JavaScript client: Official client library with Next.js support.

Best for

Supabase Auth works for developers who want an integrated backend platform and are building applications that benefit from PostgreSQL, real-time features, and storage in addition to authentication. It's suitable for startups and indie developers who want a complete backend solution without managing separate services for auth, database, and file storage.

Trade-offs

• No enterprise features: No native SAML SSO or SCIM provisioning. Unsuitable for B2B SaaS targeting enterprise customers without significant custom work.
• Platform lock-in: Authentication is tightly coupled to Supabase infrastructure. Migrating away later is complex.
• No pre-built UI components: You'll need to build login pages and auth flows yourself.
• Multi-tenancy requires custom architecture: Tenant isolation via row-level security policies and database schemas must be designed and maintained by your team.
• No built-in audit logging: Compliance-grade activity tracking requires custom implementation.
• No bot detection or fraud prevention: Protecting against malicious login attempts requires separate tooling.

4. Ory

Ory is an open-source identity infrastructure platform offering a suite of tools: Kratos for identity management, Hydra for OAuth 2.0 and OIDC, Keto for permissions, and Oathkeeper for access proxies. It's one of the most comprehensive open-source auth stacks available, and Ory Network provides a managed cloud version for teams that want open-source principles without self-hosting complexity.

Key features

• Comprehensive open-source stack: Separate services for identity (Kratos), OAuth (Hydra), permissions (Keto), and access control (Oathkeeper).
• OIDC and OAuth 2.0: Full standards-compliant implementation for federating identity.
• Ory Network: Managed cloud version with a free tier for getting started.
• Self-hostable: Full control over your infrastructure and data if preferred.
• Fine-grained permissions: Keto implements Google Zanzibar-style relationship-based access control.
• Open source: Apache 2.0 licensed with an active community.

Best for

Ory is best suited for engineering teams with strong infrastructure expertise who need a comprehensive, standards-based auth stack and want open-source flexibility. It's particularly appealing for organizations with strict compliance or data residency requirements that prevent using closed-source platforms. If your authorization needs go beyond RBAC into relationship-based access control, Ory's Keto service is one of the few open-source Zanzibar implementations available.

Trade-offs

• Steep learning curve: Configuring Kratos, Hydra, and Keto together requires deep understanding of each service's role and significant initial investment.
• No native Next.js SDK: Integration requires manual implementation of OIDC flows with no App Router-native support.
• No pre-built production UI: Ory's UI components are basic and intended as starting points, not production-ready interfaces.
• No SCIM provisioning out of the box: Enterprise directory sync requires custom integration work.
• Infrastructure overhead: Self-hosted deployments require managing multiple services, databases, and inter-service communication.
• Complex multi-tenancy: B2B tenant isolation requires careful custom architecture.

5. Stack Auth

Stack Auth is an open-source, Next.js-native authentication library with a managed cloud option. It sits in a similar space to PropelAuth (developer-friendly, pre-built components, organization support) but takes an open-source-first approach, making it a natural option for teams that want to own their auth code without building every screen from scratch.

Key features

• Next.js-native: Built specifically for Next.js with first-class App Router support and server component integration.
• Pre-built UI components: Comes with ready-made login, signup, and account management components that can be customized to match your brand.
• Open source: Fully open-source and self-hostable, with Stack Auth Cloud as a managed option.
• TypeScript-first: Fully typed API with strong IDE support throughout.
• OAuth providers: Pre-configured integrations with popular social providers.
• Magic links and passkeys: Passwordless auth methods supported out of the box.
• Basic multi-tenancy: Team and organization primitives are available, though enterprise-grade isolation requires additional work.

Best for

Stack Auth is a strong fit for developers who want an open-source alternative to PropelAuth with similar pre-built UI components and organization support but without the managed-service price tag. If open-source licensing and the ability to self-host are priorities, Stack Auth offers the closest feature parity to PropelAuth in an open-source package.

Trade-offs

• No SAML SSO: Enterprise identity provider support is not available, making it unsuitable for B2B SaaS targeting enterprise customers without significant custom work.
• No SCIM provisioning: Automated user lifecycle management for enterprise directories is not supported.
• Limited multi-tenancy: Organization primitives exist but fall short of the built-in multi-tenancy that enterprise B2B apps require.
• No audit logging: Compliance-grade activity tracking requires custom implementation.
• Younger project: Stack Auth is still maturing, with fewer battle-tested production deployments and a smaller ecosystem than more established platforms.
• Cloud tier limitations: The managed Stack Auth Cloud option is less feature-complete than dedicated auth platforms like WorkOS or PropelAuth.

Choosing the right PropelAuth alternative

The best authentication solution depends on your specific use case, team size, and growth trajectory:

• Choose WorkOS if you're building a B2B SaaS application that needs to move upmarket to enterprise customers. Pre-built AuthKit UI, SSO, SCIM, audit logs, bot detection, and fine-grained authorization come out of the box with no feature gating. It's the most complete platform for teams that don't want to outgrow their auth provider again.
• Choose Firebase Authentication if you're already on Google Cloud or Firebase and building consumer-facing apps. It's battle-tested and well-integrated with Google services, but be prepared to upgrade to Identity Platform if you need enterprise SSO or multi-tenancy.
• Choose Supabase Auth if you're a startup or indie developer who wants an integrated backend platform with PostgreSQL and real-time features. Accept that enterprise features and multi-tenancy will be your responsibility to build.
• Choose Ory if your team has strong infrastructure expertise and you need open-source flexibility with a comprehensive, standards-based stack. Expect significant setup and operational investment, but gain full control over your identity infrastructure.
• Choose Stack Auth if you want an open-source, Next.js-native library with pre-built UI components and a managed cloud option. It's the closest open-source equivalent to PropelAuth, but be aware that enterprise features like SAML and SCIM are not available.

Conclusion

PropelAuth has earned its reputation as a developer-friendly B2B auth provider, particularly for early-stage startups that need organization management, SAML SSO, and pre-built UIs in a single package. But as applications mature and enterprise requirements deepen, its tiered pricing model, smaller ecosystem, and missing capabilities like bot detection and fine-grained authorization can become real constraints.

Open-source options like Ory and Stack Auth offer control and flexibility, but require significant operational investment and custom development for enterprise features. Managed platforms like Firebase and Supabase reduce infrastructure burden but come with vendor lock-in and limited B2B capabilities.

For teams building B2B SaaS applications, especially those targeting enterprise customers, WorkOS offers the most complete path forward. AuthKit eliminates the need to build auth UI from scratch. SSO, SCIM, and audit logs work out of the box without tier gating. Radar provides real-time bot and fraud detection that PropelAuth doesn't offer. And features like fine-grained authorization, multi-tenancy, feature flags, and compliance tooling are built into the platform, so your team can focus on your product instead of your auth stack.

If you're outgrowing PropelAuth and need enterprise features, managed reliability, and excellent developer experience without the operational overhead, WorkOS provides the clearest path forward.

Get started with WorkOS today.