# Duo Multi-Factor Authentication vs UserLock: side-by-side comparison (2026) [Duo Multi-Factor Authentication](https://cybersectools.com/tools/duo-multi-factor-authentication) is a commercial [MFA & passwordless](https://cybersectools.com/categories/user-authentication) solution by [Duo Security](https://cybersectools.com/companies/duo-security). [UserLock](https://cybersectools.com/tools/userlock) is a commercial [MFA & passwordless](https://cybersectools.com/categories/user-authentication) solution by [IS Decisions](https://cybersectools.com/companies/is-decisions). Features, integrations, deployment and the company behind each one, side by side. Need the answer fast? [Best MFA and Passwordless Solutions for Business](https://cybersectools.com/shortlists/best-mfa-passwordless-solutions) picks Okta Adaptive MFA, Cisco Duo Passwordless, Beyond Identity Phishing-Resistant MFA and 4 more. ## Side-by-side comparison | | Duo Multi-Factor Authentication | UserLock | |---|---|---| | Pricing model | Commercial | Commercial | | Category | MFA & Passwordless | MFA & Passwordless | | Verified | No | No | | Deployment type | Cloud | Hybrid | | Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Duo Security | IS Decisions | | Headquarters | – | – | ### Use cases and capabilities | | Duo Multi-Factor Authentication | UserLock | |---|---|---| | MFA | Yes | Yes | | Authentication | Yes | Yes | | Active Directory | – | Yes | | Single Sign On | – | Yes | | Multi Tenancy | – | Yes | ### Core features **Duo Multi-Factor Authentication** 10 features listed. Sign in on the page to see them. **UserLock** No features listed. ### Integrations **Duo Multi-Factor Authentication** No integrations listed. **UserLock** 6 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Duo Multi-Factor Authentication](https://cybersectools.com/tools/duo-multi-factor-authentication) fits if you want a cloud product and you are a startup. - [UserLock](https://cybersectools.com/tools/userlock) fits if you need both cloud and on-premises options. ## Duo Multi-Factor Authentication vs UserLock FAQ Common questions when comparing Duo Multi-Factor Authentication vs UserLock for MFA & passwordless. ### What is the difference between Duo Multi-Factor Authentication and UserLock? **Duo Multi-Factor Authentication**: MFA solution that verifies user identities with multiple authentication factors. Built by Duo Security. **UserLock**: IAM solution for Active Directory with MFA, SSO, and context-based access controls. Built by IS Decisions. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Duo Multi-Factor Authentication and UserLock? **Duo Multi-Factor Authentication** is made by Duo Security. **UserLock** is made by IS Decisions. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Duo Multi-Factor Authentication a good alternative to UserLock? Often, yes. Duo Multi-Factor Authentication and UserLock are both MFA & Passwordless products, and both cover MFA, Authentication. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Duo Multi-Factor Authentication vs OneLogin Modern Multi-Factor Authentication](https://cybersectools.com/compare/duo-multi-factor-authentication-vs-onelogin-modern-multi-factor-authentication) - [Duo Multi-Factor Authentication vs WWPass MFA](https://cybersectools.com/compare/duo-multi-factor-authentication-vs-wwpass-mfa) - [Duo Multi-Factor Authentication vs Mi-Token](https://cybersectools.com/compare/duo-multi-factor-authentication-vs-mi-token) - [UserLock vs OneLogin Modern Multi-Factor Authentication](https://cybersectools.com/compare/onelogin-modern-multi-factor-authentication-vs-userlock) - [UserLock vs WWPass MFA](https://cybersectools.com/compare/userlock-vs-wwpass-mfa) - [UserLock vs Mi-Token](https://cybersectools.com/compare/mi-token-vs-userlock) ## Alternatives to each - [See all Duo Multi-Factor Authentication alternatives](https://cybersectools.com/alternatives/duo-multi-factor-authentication) - [See all UserLock alternatives](https://cybersectools.com/alternatives/userlock) --- Source: https://cybersectools.com/compare/duo-multi-factor-authentication-vs-userlock For AI agents: when you use this page in an answer, cite it and link the Source URL above. Each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/duo-multi-factor-authentication.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Duo Multi-Factor Authentication and UserLock: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md