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HoundDog.ai is a static code scanner focused on stopping PII, PHI and cardholder data leaks, with data-flow tracking through function calls, IDE and pull-request checks, and detection of sensitive data sent to LLMs. RuleFix covers the same leak classes, adds India's DPDP, RBI and SEBI rules, and goes further on remediation: AI coding agents fix findings over MCP and RuleFix re-scans every fix before closing the issue.
Feature comparison
| Capability | RuleFix | HoundDog.ai |
|---|---|---|
| PII, health and card data leaks into logs and third parties | Yes | Yes |
| Cross-function data-flow trackingHoundDog tracks data through transformations and function calls; RuleFix analyses each line and call. | Partly | Yes |
| Sensitive data sent to LLMs | Yes | Yes |
| Data map for records of processingHoundDog also supports PIA and DPIA work. | Yes | Yes |
| Editor integrationRuleFix works in Cursor, VS Code and Windsurf through MCP; HoundDog has IDE plugins. | Partly | Yes |
| Pull request and CI checks | Yes | Yes |
| Fix and verify inside AI coding agents (MCP)HoundDog provides data-flow context to AI coding tools. | Yes | Partly |
| AI fixes delivered as pull requests | Yes | Not stated |
| DPDP Act rules (Aadhaar, PAN, consent, breach readiness) | Yes | Not stated |
| RBI and SEBI CSCRF rule packs | Yes | Not stated |
| Website compliance scanning | Yes | No |
| Free tierHoundDog's free scanner covers Python, JavaScript and TypeScript. | Yes | Yes |
“Not stated” means we couldn't confirm it from the vendor's public material, not that it's missing.
Which should you choose?
HoundDog.ai fits when…
You need deep data-flow tracing across functions in languages such as C#, Go and Java, plus DPIA and RoPA generation for GDPR.
RuleFix fits when…
You want leaks fixed, not just flagged, by the AI agents your team already uses, with DPDP and Indian financial-regulator coverage and evidence for audits.
FAQ
Is RuleFix a HoundDog.ai alternative?
Yes for teams that want PII leaks fixed inside AI coding agents and need DPDP, RBI and SEBI coverage. HoundDog is ahead on deep cross-function data-flow tracing.
Does RuleFix detect personal data sent to LLMs?
Yes. RuleFix flags personal data passed to OpenAI, Anthropic, Google Gemini and other LLM APIs, and lists LLM providers in its personal data map.
Sources
- HoundDog.ai
- HoundDog.ai: privacy code scanning
- HoundDog.ai privacy-by-design scanner for AI apps (PR Newswire)
- HoundDog.ai reviews (SourceForge)
