Best Alternatives to Clerk

Abnormal Security revolutionizes email protection with behavioral AI that detects sophisticated threats like business email compromise, account takeover, and vendor fraud that bypass traditional signature-based gateways. By analyzing thousands of signals per message and learning normal communication patterns, it catches socially engineered attacks that contain no malicious payloads.

From ~$30/user/year (enterprise, custom quoted)

Southeast Asia's leading enterprise identity verification platform with 99.2% biometric accuracy, enabling organizations to automate eKYC/AML/KYB compliance across 13 markets. Serves 500+ financial institutions processing 1B+ monthly API calls with unified compliance, deepfake detection, and enterprise-grade fraud prevention.

From Contact for enterprise pricing

Open-source toolkit for adding programmable safety guardrails to LLM-powered applications using the Colang specification language for topic control, content filtering, and fact-checking.

From Free

Enterprise identity and access management platform providing SSO, MFA, lifecycle management, and zero-trust security for workforce and customer identities.

From $2/user/month

AI-powered email security platform using behavioral analysis to prevent phishing, data loss, and misdirected emails. Now integrated into Proofpoint's email protection suite following the December 2023 acquisition.

From Enterprise

AI-powered cloud security platform providing comprehensive risk assessment and threat detection across multi-cloud environments

From Enterprise

Enterprise authentication infrastructure that adds SSO, directory sync, SCIM provisioning, and audit logs to your application, enabling B2B SaaS companies to close enterprise deals faster without building complex identity features in-house.

From Free