Compare Auth.js vs. Duende IdentityServer

FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API. Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around. Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably. Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.

Auth0 takes a modern approach to Identity and enables organizations to provide secure access to any application, for any user. Auth0 is highly customizable, and simple yet flexible. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. With Auth0, you can rapidly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.

Kinde is auth for modern applications. Our powerful user authentication integrates in minutes and has a free tier to let you get started straight away. Every aspect of Kinde is designed to help your business grow and scale. From startup to IPO in a single platform. Authentication happens at some of the most important, and highly impactful, places in your customers' journey. Our powerful builder allows you to make sure that your pages are on brand and as beautiful as the rest of your website and product experience. Up-level your security with multi-factor authentication (MFA). Give your users access to advanced authentication options, protecting them from reused or breached passwords. Take control of user authorization and access with enterprise SSO and custom SAML so that you can support your biggest customers as quickly as possible. Manage users from one beautiful dashboard or using the API. Add and invite users, manage roles and permissions, and get a complete picture of your user activity. Controlling who can access which individual pieces of data and interface is critical to protecting your business and your customers. Hierarchical role-based access control is the best way to manage this. Allowing strict control and flexible assignment – aligning everything from your business view of the world right down to the code you ship to customers. Kinde was created by founders and engineers to help businesses generate more revenue, reduce costs and make lifelong loyal customers – in one place. Every day, Kinde gives our community of founders and partners across the globe, the infrastructure they need to build anything they can imagine.

ID.me simplifies how individuals prove & share their identity online. The ID.me secure digital identity network has over 98 million users, as well as partnerships with 30 states, 10 federal agencies, and over 500 name-brand retailers. The company provides identity proofing, authentication and community verification for organizations across sectors. ID.me is the only provider with video chat and is committed to "No Identity Left Behind" to enable all people to have a secure digital identity.

Know the real identity of your customer, user, or employee with the Udentify Identity Verification and Biometric Authentication solution. Challenges we solve: - Identify verification - Onboarding - New account opening - Age verification - Fraud prevention - Biometric authentication - Passwordless authentication - Strong customer authentication - KBA replacement - KYC and AML compliance Udentify is iBeta Level 1 and Level 2 certified, quickly integrates into your website or mobile app and lets your users navigate from a desktop to a mobile experience as desired.

Secure your workforce with powerful, simple access security. We are Cisco Duo. Our modern access security system is designed to protect all users, devices, applications, so you can focus on what you do best. Secure access for all users and devices, in any environment, from any location. You will enjoy the peace of mind that only total device visibility and trust can provide. A SaaS solution that natively protects all applications and is easy to deploy, scaleable and quick to respond to threats. Duo's access security protects all applications from compromised credentials and devices. It also provides comprehensive coverage that helps you meet compliance requirements. Duo integrates natively with applications to provide flexible, user friendly security that is easy to implement and manage. It's a win-win-win for administrators, users, and IT staff. Multi-factor authentication, dynamic device trust and adaptive authentication are key components of your zero-trust journey. Secure SSO is also a part of the mix.

Plaid is an international data network that powers tools used by millions of people to live a more healthy financial life. Our ambition is to facilitate an inclusive, competitive and mutually beneficial financial systems by simplifying payments and revolutionizing lending. Plaid works with more than 8,000 companies, including fintechs such as Venmo and SoFi and several Fortune 500 companies, to give people more control and choice over how they manage money. Plaid is headquartered in San Francisco and its network spans more than 12,000 institutions throughout the US, Canada UK and Europe.

Sumsub is a single verification platform that allows you to onboard more customers worldwide, speed up their access, reduce costs, and fight digital fraud. Sumsub combines effective verification flows with higher conversion rates worldwide through a powerful, all in one suite designed for a wide variety of needs: KYC/AML verification, KYB verifications, payment fraud prevention and face authentication.

Veriam brings access and subscription management together in a single, secure platform designed to simplify operations, reduce admin time, and improve security. From onboarding to offboarding, Veriam makes it easy to manage access permissions and subscription plans for customers, partners, and employees—all in one place. With Veriam, access permissions and subscription updates happen in real-time. When subscriptions are renewed, upgraded, or changed, access is automatically updated too—so customers always have the right access, without delays. This real-time synchronization means fewer support tickets and a better customer experience. Users only need one login to access products, subscriptions, and data from any organization using Veriam. No more juggling multiple logins or passwords—just a smooth, familiar experience every time they log in. Veriam offers self-service. Customers can update their own subscriptions, manage access, and change profile details without support. This reduces the load on support teams and gives users more control. Built with security and compliance in mind, Veriam follows industry standards, giving you confidence that customer data is handled securely. Try us out today!

Global OEMs, SaaS and enterprise end-users rely on Adobe PDF Library to automate the creation, editing and management of PDFs. An Adobe partner, our SDK uses the same source code as Acrobat for stability, reliability and quality results. Languages: .NET, .NET Framework, Java and C/C++ Platforms: Windows, Linux & MacOS Package managers: NuGet & Maven Capabilities include but are not limited to: -Annotations -Content creation -Content modification -Color management -Extraction - text, images, forms -Compression/optimize -Conversion - PDF/A, PDF/X, EPS, PostScript, XPS, ZUGFeRD, color -Display, Printing -Extract text, images & other content -Forms - Import, export, flatten static & dynamic XFA forms, AcroForms -Images - extract, import/export, thumbnails, render/rasterize pages, separations -Optimization - size, content, images, etc. -OCR - add text to document, add text to image -PDF to Office Documents (Word, Excel, PPT) -Security - Viewer settings, redactions, password, encrypt/decryption, watermark Pricing options for OEMs, SaaS & end-users are flexible and based on usage. Shorten development times & get to market faster with Adobe PDF Library. Free trial - download today.