Compare OAuth vs. ZITADEL

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.

1Password is a password manager that's secure, scalable, easy-to-use, and trusted by some of the most prestigious companies in the world. 1Password makes it easy to keep your employees safe online with its simple interface. Good security habits will become second nature once 1Password is a part of your employees' workflow. 1Password Advanced Protection now available with 1Password Business You can set Master Password policies, enforce two factor authentication across the entire team, limit access with firewall rules, review sign in attempts, and require that your team use the latest version 1Password. Our award-winning apps can be downloaded for Mac, iOS and Linux as well as Windows, Android, and Windows. 1Password syncs seamlessly between devices so that your employees have access to their passwords at all times. Your risk is reduced and your productivity increases when everyone uses 1Password.

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.

Both IT teams and end users are afflicted by password reset tickets. IT teams will often push more urgent issues down the queue to ensure that users don't have their work put on hold while their passwords reset. Password reset tickets can be costly if they aren't addressed promptly. Nearly 30 percent of all help desk tickets were caused by forgotten passwords. It is not surprising that large companies have spent more than $1 million to resolve password-related help desk requests. It is a good habit to change passwords regularly, as it helps prevent cyberattacks caused by stolen credentials. Security experts recommend that administrators ensure that users change their passwords regularly and have password expiration policies in place.

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.

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!

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.

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.

ARGOS is a platform for AI-powered digital identity. We are revolutionizing the way identity is experienced around the world. We create essential identity solutions for individuals and businesses to ensure the security of digital ecosystems worldwide. We provide services that help you identify Anyone, Anywhere, Anytime!

Password security is the foundation of cybersecurity. Keeper's powerful password security platform will protect your business from cyberthreats and data breaches related to passwords. Research shows that 81% of data breaches can be attributed to weak passwords. Password security platforms are an affordable and easy way for companies to address the root cause of most data breaches. Your business can significantly reduce the risk of data breaches by implementing Keeper. Keeper creates strong passwords for all websites and apps, then secures them on all devices. Each employee receives a private vault to store and manage their passwords, credentials and files, as well as private client data. Employees will save time and frustration by not having to remember, reset, reuse, or remember passwords. Industry compliance is achieved through strict and customizable role-based access controls. This includes 2FA, usage auditing, and event reporting.