Duende IdentityServer vs. ZenKey Comparison Chart

FusionAuth is a modern, developer-focused identity and access management platform built to give you full control over your authentication stack. Whether you’re building a startup app or managing enterprise-scale infrastructure, FusionAuth delivers all the must-have features — from login and SSO to advanced protocols like OAuth2, OIDC, SAML, and WebAuthn — in a self-hostable or cloud-native package. Designed with developers in mind, FusionAuth integrates seamlessly with any language, framework, or architecture. Every capability is API-first and built for extensibility, so you can tailor authentication workflows without getting locked into rigid, inflexible systems. FusionAuth supports all the key use cases — user registration, multi-factor authentication (MFA), passwordless login, role-based access control, and more — while helping you stay compliant with GDPR, HIPAA, PCI, and other regulatory standards.

Auth0 takes a modern approach to Identity, providing secure access to any application, for any user. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. Auth0 is part of Okta, The World’s Identity Company™. Auth0 lets you quickly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control. Authenticate users across all applications with a customized, secure, and standards-based single login. Universal Login connects users to a central authorization server. Credentials aren’t transferred across sources, which boosts security and protects against phishing and credential stuffing attacks. OAuth 2.0 recommends that only external user agents (like the browser) be used by native applications for authentication flows. Auth0’s Universal Login achieves this while enabling SSO.

Frontegg is a Customer Identity and Access Management (CIAM) platform that simplifies authentication, authorization, and user management for SaaS companies. It enables developers to implement advanced identity features quickly, then shift ongoing administration to other teams. With Frontegg, Product, Infosec, and Customer Success teams can take control of key identity tasks like managing user roles, enforcing security policies, and handling customer requests, all without engineering support. Developers reduce toil and regain focus on core product work, while stakeholders move faster without bottlenecks. Frontegg supports modern identity features including SSO, MFA, role-based access control, entitlements, multi-tenancy, and audit logs. Its low-code platform integrates in days and provides a user-friendly admin portal that bridges technical and non-technical teams. Frontegg increases operational efficiency, improves security posture, and enhances the customer experience.

Plaid is a global fintech infrastructure platform that enables businesses and consumers to securely connect to financial data and services. Through APIs that connect to more than 12,000 financial institutions across 20+ countries, Plaid operates the world’s largest open banking data network. By removing the complexity of direct bank integrations, Plaid enables developers, financial institutions, and enterprises to build secure, user-friendly, and conversion-optimized financial products. Plaid powers payments, lending, identity verification, fraud prevention, and personal finance applications. Today, more than 100 million people worldwide, including half of U.S. adults, have relied on Plaid through their connections to over 7,000 apps and services.

Authologic is a global identity orchestration platform that connects all major verification methods through one API — enabling secure, compliant, and seamless digital onboarding worldwide. It combines government databases, e-IDs, digital wallets, bank IDs, document OCR & biometrics into a single flow — helping businesses onboard users faster, reduce fraud & meet KYC, KYB, and AML requirements. Authologic integrates over 50 methods in more than 200 countries, ensuring consistent & compliant identity verification globally. With automated routing, fallback & workflow optimization, it adapts easily to multiple markets without rebuilding onboarding processes. Built for compliance & scalability, Authologic is eIDAS 2.0-ready, PSD2 AISP-licensed, ISO 27001 / 9001 / 22301 certified, and backed by Y Combinator, operating from London, San Francisco & Warsaw.

Guardz is the unified cybersecurity platform purpose-built for MSPs. We consolidate the essential security controls, including identities, endpoints, email, awareness, and more, into one AI-native framework designed for operational efficiency. Our identity-centric approach connects the dots across vectors, reducing the gaps that siloed tools leave behind so MSPs can see, understand, and act on user risk in real time. Backed by an elite research and threat hunting team, Guardz strengthens detection across environments, turning signals into actionable insights. With 24/7 AI + human-led MDR, Guardz utilizes agentic AI to triage at machine speed while expert analysts validate, mitigate, and guide response, giving MSPs scalable protection without adding headcount. Our mission is simple: give MSPs the scale, confidence, and clarity they need to stay ahead of attackers and deliver protection to every SMB they serve.

Iris Identity Protection API sends identity monitoring and alerts data into your existing digital environment – an ideal solution for businesses that are looking to offer their customers identity protection services without having to build a new product or app from scratch. By integrating Iris' identity monitoring and alerts into your existing product, your company can: Embed specific features: You have full control to design the user interface and use terminology that aligns best with your customers' needs. Customize fields: Choose the types of data that resonate most with your customers. You can even customize the placement, sequence, and titling fields according to your preferences. Choose how to deliver alerts: Whether you prefer to communicate alerts through SMS, email, or in-app notifications – the choice is yours.

Iru (formerly Kandji) is an all-in-one, AI-powered security and compliance platform designed to simplify IT management and strengthen enterprise protection. Built on the Iru Context Model, it unifies identity, endpoint, and compliance into a single intelligent system that understands users, devices, and applications in context. With passwordless workforce identity, advanced endpoint detection, and automated compliance, Iru delivers both security and efficiency without the complexity of multiple tools. Its integrated approach enables IT teams to secure access, prevent threats, and maintain continuous audit readiness—all from one intuitive platform. Trusted by over 5,000 companies including Plaid, Notion, Airbus, and Vercel, Iru transforms how modern businesses manage digital trust. The result is reduced IT workload, improved employee experience, and enterprise-grade protection built for the AI era.

Securden Unified PAM is a privileged access security solution that lets you discover, centrally store, organize, share, manage, and keep track of all privileged identities, passwords, keys, documents, and other identities. It helps you establish a centralized password management system, automate management with approval workflows, control ‘who’ can access ‘what’, monitor, and record all access to critical IT assets, and enforce password security best practices. The major modules of Securden Unified PAM are password management, privileged account management, secure remote access, application control, endpoint privilege management, privileged session management, and SSH key management. The platform supports compliance with NIS2, DORA, NIST, PCI-DSS, HIPAA, and ISO-IEC 27001. Installation typically takes only a few minutes, and a complete production-ready PAM can be achieved in less than a month with Securden Unified PAM.

10Duke Enterprise is a cloud-based, scalable and flexible software licensing solution enabling software vendors to easily configure, manage and monetize the licenses they provide to their customers in real-time. 10Duke enables you to gain a single point of license control for desktop, SaaS, and mobile apps, APIs, VMs and devices. It’s cloud-native, supports all license models, integrates with CRM & Ecommerce, has a built-in Customer Identity Management solution, and supports offline scenarios. 10Duke Enterprise is used by SMBs and Fortune 500 customers alike, and is SOC2 compliant. 10Duke Enterprise is used across a wide range of industries by the fastest-growing software vendors that offer desktop, SaaS and mobile apps, devices, APIs and VMs. It's specifically designed for fast-growing software businesses looking to scale up licensing & minimize friction. 10Duke Enterprise is used around the world by leading brands including Trimble, Causeway, Seequent, Maxon and Steinberg