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What is Duende IdentityServer?
Security infrastructure sits at the heart of modern software, yet most solutions force organizations into an uncomfortable tradeoff: accept vendor lock-in or compromise on security to gain flexibility.
Duende IdentityServer resolves that tension. Our platform delivers robust, standards-aligned identity infrastructure built ground-up for .NET by recognized experts and contributors to foundational security protocols — among them OpenID Connect, OAuth 2.0, Backend for Frontend (BFF), and FAPI.
Developers get extensive customization by design — complete ownership of the UI, business logic, and deployment environment — paired with the licensing transparency and predictable cost structure that compliance-driven industries like finance and healthcare require. When you need to integrate reliable, modular identity into your stack without sacrificing control or technical depth, Duende is the trusted foundation. We bring the expertise to identity infrastructure, freeing you to invest yours where it matters most.
What is Auth0?
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.
Integrations Supported
Google Cloud Platform
Active Directory
Adobe Acrobat Sign
Arctic Wolf
Arengu
Aritic Mail
Aserto
Azure Spring Apps
BoxyHQ
Crowdin
API Availability
Has API
API Availability
Pricing Information
Free plan
Whether you're testing for development or personal projects, or building a full-blown enterprise identity solution, Duende has a plan to fit your needs.
Free Version
Free Trial Offered?
Pricing Information
Free plan
Up to 25,000 monthly active users will have:
1 Custom Domain*
Secure Agentic AI workflows
Passwordless Authentication
Unlimited Social Connections**
5 Organizations
Brand Customization
Basic Attack Protection
Community Support
1 Enterprise Connection
Self-Service SSO
SCIM
*credit card verification required for custom domains.
**subject to system limitations.
1 Custom Domain*
Secure Agentic AI workflows
Passwordless Authentication
Unlimited Social Connections**
5 Organizations
Brand Customization
Basic Attack Protection
Community Support
1 Enterprise Connection
Self-Service SSO
SCIM
*credit card verification required for custom domains.
**subject to system limitations.
Free Version
Supported Platforms
Windows
On-Prem
Supported Platforms
SaaS
Android
iPhone
iPad
Customer Service / Support
Web-Based Support
Customer Service / Support
24 Hour Support
Training Options
Documentation Hub
Webinars
Online Training
Training Options
Documentation Hub
Webinars
Online Training
Company Facts
Organization Name
Duende Software
Date Founded
2009
Company Location
United States
Company Website
duendesoftware.com
Company Facts
Organization Name
Okta
Date Founded
2009
Company Location
United States
Company Website
auth0.com
Categories and Features
Authentication
Multifactor Authentication
Single Sign On
Identity Management
Not specified
Multi-Factor Authentication (MFA)
Not specified
Categories and Features
Agentic Identity and Security (AISP) Platforms
Not specified
Authentication
Credential Management
Knowledge-Based Authentication
Mobile Authentication
Multifactor Authentication
Policy Management
Self Service Portal
Single Sign On
Social Sign On
Customer Identity and Access Management (CIAM)
Access Management
Credential Management
Multi-Factor Authentication (MFA)
Self-Service Portal
Identity and Access Management (IAM)
Not specified
Identity Governance and Administration (IGA)
Not specified
Identity Management
Access Certification
Compliance Management
Multifactor Authentication
Password Management
Privileged Account Management
Self-Service Access Request
Single Sign On
User Activity Monitoring
User Provisioning
KYA (Know Your Agent)
Not specified
Microsegmentation
Not specified
Multi-Factor Authentication (MFA)
Not specified
Passwordless Authentication
Not specified
Risk-Based Authentication
Not specified
Role-Based Access Control (RBAC)
Not specified
Serverless
API Proxy
Application Integration
Data Stores
Developer Tooling
Orchestration
Reporting / Analytics
Serverless Computing
Storage
Single Sign On
Not specified
User Provisioning and Governance
Not specified
Zero Trust Security
Not specified
