Auth0 vs. OneLogin: Which Is Right for Your Team?

Compare Auth0 and OneLogin to find the right fit for your team, whether you need Auth0's developer-first CIAM for custom, API-heavy applications or OneLogin's straightforward workforce SSO built for SMB and midmarket speed-to-value.

Both Auth0 and OneLogin handle authentication and access management, but they were built for different problems. Auth0 is purpose-built for customer-facing identity. Think B2C apps, B2B SaaS multi-tenancy, and deep developer extensibility. OneLogin focuses on workforce IAM: getting employees, contractors, and partners into their tools fast with minimal friction. If you're evaluating which belongs in your stack, the right answer depends almost entirely on who you're authenticating and how much custom logic your team needs to own.

Auth0 vs. OneLogin at a glance

Here's how the two platforms stack up across the dimensions that matter most for IAM decisions.

Overview of Auth0

Auth0 is a Customer Identity and Access Management (CIAM) platform, now operating as the Okta Customer Identity Cloud following Okta's $6.5 billion acquisition in 2021, designed for organizations that need to embed authentication and authorization directly into externally-facing, custom-developed applications. It handles everything from social login and passwordless flows to machine-to-machine authentication and multi-tenant B2B SaaS identity, so engineering teams don't have to build and maintain auth infrastructure themselves.

Key Features:

• Universal Login with Advanced Customizations (ACUL) for fully branded, client-rendered auth screens
• Multi-Factor Authentication with FIDO2/WebAuthn, passkeys, and Actions-driven conditional enforcement
• Single Sign-On with enterprise federation across Active Directory, LDAP, PingFederate, and SAML
• Auth0 Actions extensibility framework—serverless JavaScript with access to nearly all public npm packages
• Self-Service SSO enabling B2B SaaS vendors to delegate SSO setup to their own enterprise customers
• Machine-to-machine authentication via OAuth 2.0 Client Credentials flow, including Private Key JWT
• SCIM-based user provisioning is available through Self-Service SSO, which is in General Availability (GA)
• Auth0 for AI Agents; generally available extension of identity to non-human AI agent authentication

Ideal for: Engineering-led teams building customer-facing or multi-tenant B2B SaaS applications that need a flexible, API-first identity layer they can extend without building from scratch.

Overview of OneLogin

OneLogin is a cloud-based Identity-as-a-Service (IDaaS) platform, acquired by One Identity in October 2021, that connects employees, contractors, and partners to the tools they need through a single secure login. It positions itself as a Unified Access Management (UAM) platform, consolidating SSO, adaptive MFA, directory integration, and user lifecycle management in one place, with a particular focus on speed-to-value for SMB and midmarket IT teams.

Key Features:

• Single Sign-On across 6,000+ pre-built application integrations
• SmartFactor Authentication powered by the Vigilance AI risk engine—adjusting MFA requirements based on who, where, how, what, and when
• Cloud Directory with real-time Active Directory sync and support for additional Active Directory Connector instances for high availability
• Automated user provisioning and deprovisioning with rules-based entitlement management
• RADIUS module for extending SSO and MFA to VPN and WiFi infrastructure
• Desktop MFA and Windows/macOS biometric factor support (Windows Hello, TouchID)
• OneLogin Workflows add-on for no-code identity automation
• European data residency with hosting in geographically distributed data centers in the European Economic Area (EEA)

Ideal for: SMB and midmarket IT teams that need fast, manageable workforce SSO and adaptive MFA across a broad application catalog without deep developer customization.

Side-by-Side Feature Comparison

When to Choose Auth0 vs. OneLogin

Both platforms are solid IAM choices; the question is what problem you're actually solving.

Choose Auth0 if you need:

• Authentication for a consumer-facing app or B2B SaaS product (not just internal employees)
• Deep developer extensibility, like custom login flows, serverless auth logic, and API-first architecture
• Purpose-built multi-tenancy so enterprise customers can manage their own SSO and user provisioning
• Support for complex scenarios: machine-to-machine auth, AI agent identity, fine-grained authorization
• A CIAM-first platform that was designed for external users from the start, not retrofitted from workforce IAM

Choose OneLogin if you value:

• Fast deployment of workforce SSO across a large application catalog (thousands of pre-built integrations)
• Adaptive, AI-driven MFA without needing to write custom enforcement logic
• Strong HR-system integration for identity lifecycle management tied to Workday, BambooHR, or UKG
• A proven midmarket track record, reviewed across major software review platforms
• Per-user pricing that's predictable and doesn't escalate based on MAU growth patterns
• EU data residency requirements (EEA hosting)

Neither tool is universally better. Auth0 wins when your identity problem lives in your product. OneLogin wins when it lives in your IT stack.

Automate the Identity Workflows Around Your IAM Stack

Auth0 and OneLogin each handle the authentication layer well, but neither manages what happens around authentication. When an employee needs access provisioned, an approval routed, or a new hire onboarded across IT, HR, and Finance simultaneously, that coordination still lands on someone's plate manually. Siit handles that layer: cross-team request routing, access provisioning workflows, approval chains, and service desk coordination—all triggered directly in Slack or Microsoft Teams, without requiring employees to open another portal.

Siit's native integrations with Okta and Microsoft Entra ID mean identity-adjacent workflows, like syncing user data, triggering access requests, or managing offboarding checklists, can be automated end-to-end regardless of which IAM platform sits underneath. Whether your team runs Auth0 for customer identity or OneLogin for workforce SSO, Siit handles the service request workflows that IAM tools don't touch: the handoffs, approvals, and system updates that usually turn a five-minute task into a three-day coordination thread.

Book a demo today.