Snyk Code
AI Infrastructure
Secures code, agents, and apps generated by AI.
- AI Security
- Code Security
- Agent Security
Freemium
Best Harden Alternatives in 2026
Harden: Checks coding-agent tool calls before execution. Here are 12 alternatives — compare pricing, free plans and API access side by side.
Harden vs. alternatives
| Tool | Category | Pricing | Starting at | Free plan | API | Open source |
|---|---|---|---|---|---|---|
| AI Infrastructure | Free | — | |||
| AI Infrastructure | Freemium | $25/month | |||
 | AI Infrastructure | — | — | |||
 | AI Infrastructure | Paid | — | |||
 | AI Infrastructure | — | — | |||
 | AI Infrastructure | Free | — | |||
 | AI Infrastructure | — | — | |||
 | AI Infrastructure | — | — | |||
 | AI Infrastructure | Free | — | |||
 | AI Infrastructure | — | — | |||
 | AI Infrastructure | Free | — | |||
 | AI Infrastructure | Freemium | $199/month | |||
 | AI Infrastructure | Freemium | $50/month |
Top Harden alternatives
Hopper
AI Infrastructure
Agentic AI for mainframe modernization and COBOL preservation
- Mainframe Modernization
- COBOL Preservation
- Institutional Knowledge
iDox.ai Guardrail
AI Infrastructure
Protects PII, PHI, and sensitive data with automated redaction and AI guardrails.
- Data Anonymization
- AI Governance
- Real-Time Protection
Paid
AuditOne
AI Infrastructure
Manages audit workflows with automation and compliance tools.
- Audit Infrastructure
- AI Governance
- Compliance Management
LochBot
AI Infrastructure
Analyzes system prompts for security vulnerabilities with 31 attack patterns
- Prompt Injection
- Security Scoring
- Client-Side Analysis
Free
MAI
AI Infrastructure
Pioneering AI research and development by Microsoft.
- AI Evaluation
Agentic Radar
AI Infrastructure
Security scanner for LLM agentic workflows
- Agentic Workflows
- Prompt Security
- Workflow Security
Prism Scanner
AI Infrastructure
Open-source security scanner for AI Agent skills, plugins & MCP servers
- AI Security
- Open Source
- Code Scanning
Free
Prediction Guard
AI Infrastructure
Enforces NIST and OWASP policies for AI models and agents within security boundaries.
Agentic Security
AI Infrastructure
LLM vulnerability scanner and AI red teaming kit
- LLM Security
- AI Red Teaming
- Vulnerability Scanning
Free
Respan
AI Infrastructure
AI router with built-in observability and automated evaluations.
- LLM Observability
- Automated Evals
- Prompt Optimization
Freemium
Pinecone
AI Infrastructure
AI knowledge platform for accurate, fast, cost-effective AI.
- AI Knowledge
- Vector Databases
Freemium