Silverfort Universal Multi-factor authentication vs UserLock: Side-by-Side Comparison (2026)

Short answer

Organizations protecting legacy applications and OT systems should pick Silverfort Universal Multi-factor authentication because it enforces MFA without code changes or agent deployment, a constraint that kills most competitors in these environments. The agentless architecture extends MFA to Kerberos, NTLM, LDAP, and command-line tools that modern solutions simply skip over, backed by risk-based enforcement tied to real-time threat signals for adaptive policy. Skip this if your infrastructure is cloud-native and you need MFA as one layer of a broader identity platform; Silverfort is deliberately built for the hard authentication problems that on-premises environments create. SMB and mid-market teams managing on-premises or hybrid Active Directory environments need UserLock for context-aware access control that blocks compromised credentials even after MFA bypass. The tool maps directly to NIST PR.AA by enforcing device posture and location checks before granting logon, not just at initial authentication. Skip this if your infrastructure is cloud-native or you lack Active Directory as a core identity system; UserLock's value collapses without AD to anchor on.