Authsignal 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.

Cisco Duo is a cloud-based identity security solution that protects organizations from identity-based threats and boosts workforce productivity. Trusted by over 40,000 organizations worldwide, Duo delivers an exceptional access management experience across all users, devices, and applications, making access to resources secure, seamless, and easy. Duo with Cisco Identity Intelligence provides deep visibility across your identity ecosystem, adding a powerful security layer to any identity infrastructure. Offer users a world-class access experience through Duo Passport to eliminate MFA friction and fatigue without sacrificing security. To stop threats, Duo verifies user identities with strong authenticators including Duo passwordless, Verified Duo Push with number matching, and phishing-resistant factors like biometrics and FIDO2 security keys. Paired with deep insights into users’ devices, Duo gives you the control to adaptively limit access based on device health or user risk.

Authentication happens at some of the most important, and highly impactful, places in your customers' journey. Take control of user authorization with a passwordless authentication, social integrations, and enterprise SSO. Support the branding of all your customers with custom domains and a fully customisable UI by bringing your own pages and designs. Integrate with complex requirements and run your own code during authentication using our powerful workflows. Organise all your business customers using organizations to easily segergate them and fine tune the authentication experience to their individual needs. Monetize your ideas quickly with Kinde's billing tools. Create subscription plans and collect revenue effortlessly. Kinde adapts to your business model, supporting B2C, B2B, and B2B2C with robust organization management and flexible billing logic that scales with your customers.

Proton Pass is an open-source password manager based in Switzerland that encrypts your usernames, passwords, bank cards, and encrypted notes and lets users quickly autofill details across all devices and browsers. Proton Pass goes beyond keeping your password safe, it secures your online identity with its additional features and enables secure sharing of log-in information. Proton Pass is built by the same team of scientists who met at CERN and created Proton Mail, the world’s largest encrypted email service. Proton has been recommended by the United Nations for sharing highly sensitive data, and our encryption is open source and battle tested. Proton Pass is the first password manager built by a security company with a privacy-first philosophy. Join the millions of people who have signed up for Proton to protect their information.

ADSelfService Plus is an on-premises access management solution that caters to businesses across various industries, such as IT, banking, engineering, education, aviation, and telecommunications. Key features include: 1. Self-service password resets and account unlocks: Users can reset their passwords in AD and unlock their domain accounts from a web browser. 2. MFA: Machine logins, VPN and OWA logins, and cloud app logins can be secured using MFA. 3. Password synchronizer and SSO: Users can log in to multiple apps using one unified identity via SSO and real-time password synchronization. 4. Password policy enforcer: Admins can configure custom password policies to enforce strong password creation. 5. Password expiration notifier: Admins can send end users password expiration notifications via SMS or email. 6. Directory self-update: Users can update their AD attribute information through the directory self-update feature.

ARGOS is an AI-powered Identity Platform. We revolutionize how the world experiences identity. We create essential identity services for people and businesses to ensure a secure digital ecosystem worldwide. We provide services to help you identify Anyone Anywhere Anytime! ARGOS’s ID check enables seamless remote identity verification for blockchain, gaming, virtual assets, e-commerce, and fintech. With 99.996%+ accuracy, it delivers facial recognition within a day, minimizing verification errors. Supporting IDs from 200+ countries, it uses Liveness technology to detect forged faces and documents for secure authentication. As an all-in-one solution, ID check combines essential verification engines, eliminating the need for separate integrations. Businesses can also customize features as needed. From data extraction to fraud prevention, ARGOS helps businesses enhance security, streamline operations, and prevent fraud efficiently. Grow your business with our service!

Plaid is a global data network that powers the tools millions of people rely on to live a healthier financial life. Our ambition is to facilitate a more inclusive, competitive, and mutually beneficial financial system by simplifying payments, revolutionizing lending, and leading the fight against fraud. Plaid works with over 12,000 companies including fintechs like Venmo and SoFi, several of the Fortune 500, and many of the largest banks to empower people with more choice and control over how they manage their money. Headquartered in San Francisco, Plaid’s network spans over 12,000 institutions across the US, Canada, UK and Europe.

Uniqkey: Protect every login. Access with confidence. Uniqkey is Europe’s trusted password and access management platform - purpose-built for companies that demand security, simplicity, and control. Engineered by European cybersecurity experts, our platform combines military-grade encryption with an effortless user experience. We remove complexity from everyday workflows, helping employees stay secure without slowing them down. From auto-filling 2FA codes to streamlining access across your cloud environment, Uniqkey keeps security frictionless and productivity high. With real-time visibility across your entire infrastructure, IT teams gain complete control over access rights, employee activity, and security scores - empowering them to defend against threats and drive compliance with confidence proactively. Seamlessly integrated with Microsoft and other core systems, Uniqkey makes provisioning and offboarding fast, automated, and secure.

Sardine AI saves the time of evaluating, negotiating and integrating with dozens of third party risk providers across identity fraud, documentary verification, card and bank fraud etc. Launching new products or markets becomes a lot faster while improving your reputation with regulators and payment schemes. Sardine is the first fraud solution truly built for Digital businesses. Current anti-fraud providers were built for e-commerce platforms and over-index on signals such as shopping cart analytics or shipping address to detect fraud, none of which are available to digital businesses. Sardine detects 3x more fraud than incumbents which were built for e-commerce fraud while we are the first solution built truly for digital businesses. Fraud prevention often means asking your operations team to perform manual reviews. With Sardine, we automate most of these manual reviews, so large FinTechs often see $500K per year in savings due to the automation.