VibeRails vs Semgrep

What Semgrep does well

• Fast, lightweight static analysis with an open-source engine. Runs locally in seconds and integrates into any CI pipeline
• Powerful custom rule language that's more expressive than regex – YAML rules with AST-aware pattern matching across 30+ languages
• Extensive community rule registry with thousands of pre-built rules for security vulnerabilities, best practices, and framework-specific patterns
• Supply chain security with dependency scanning and secrets detection built into the platform

Where Semgrep falls short for legacy codebases

• Pattern matching – even AST-aware – can't reason about business logic, understand architectural decisions, or follow complex data flows across modules
• Custom rules require expertise to write. Teams need to learn Semgrep's YAML rule syntax and understand AST patterns to go beyond the community registry
• No full-codebase audit workflow. Semgrep scans for known patterns but doesn't systematically review code for issues no rule has been written for
• Team/Enterprise pricing can be expensive for large organisations at $110/contributor/month

What VibeRails does differently

• Uses frontier LLMs to understand code semantics – catches issues that no pattern rule could express, like business logic bugs, architectural anti-patterns, and context-dependent security vulnerabilities
• Full-codebase audit by design. VibeRails reviews every file systematically, building cumulative understanding of the codebase as it goes
• No rule writing needed. The AI understands code like a senior developer would – you don't need YAML rules or AST knowledge
• Fix sessions dispatch AI agents to implement approved changes, not just flag issues with autofix templates

Pricing comparison