PromptLock scans user inputs before they hit your LLM. Detects prompt injection attacks with 98% accuracy and automatically redacts PII/PHI based on compliance context (HIPAA, GDPR, PCI). Single API endpoint, ~100ms response, free tier with 3K requests/month. Integrations for n8n, Flowise, Bubble, and Retool.
PromptLock is an AI firewall that blocks prompt injection and redacts PII/PHI in a single API call.
- for
- Teams building AI apps that handle regulated customer data.
- pricing
- freemium · free trial
works withn8nFlowiseBubbleRetoolRapidAPI
Key features
6 features of PromptLock
- Compliance-aware redaction — Detects and redacts HIPAA, GDPR, and PCI-DSS data based on context.
- Prompt injection detection — Blocks jailbreaks, system-prompt overrides and injection chains before they reach the LLM.
- Audit-ready logging — Logs every request with compliance tags and allows CSV/JSON export.
- One-line SDK integration — Add protection with a single function call in your code.
- Dashboard & usage insights — Provides request history, violation insights and compliance reporting.
- Rate limiting & abuse protection — Built-in limits (100/min) and key-based access control.
Use cases
- Redact patient health information before sending queries to a medical LLM.
- Prevent prompt injection attacks in a customer-support chatbot.
- Ensure GDPR-compliant handling of EU user data in an AI-driven recommendation engine.
PromptLock pricing
- Free$0/mo3K prompts/month · Basic redaction · Prompt injection detection · API access
- Starter$49/mo/month100K prompts/month · Dashboard access · Usage tracking & insights · Priority email support
- Pro$199/mo/month500K prompts/month · PCI detection · Dashboard access · Priority support
PromptLock vs alternatives
 PromptLock |  Snyk |  Doppler |  Semgrep | ||
|---|---|---|---|---|---|
| Best for | Compliance-aware prompt protection | Static code security | Container & secret scanning | Secrets management | Static code analysis |
| Pricing | Freemium | Subscription | Free | Subscription | Subscription |
| DevHunt upvotes | 0 | 0 | 0 | 0 | 0 |
| Launched | Jan 2026 | — | — | — | — |
- PromptLock vs Snyk: Focuses on code vulnerability scanning, not AI prompt protection.
- PromptLock vs Trivy: Scans containers and code for secrets, but doesn’t handle LLM prompt injection.
- PromptLock vs Doppler: Manages secrets for infrastructure, not real-time AI input filtering.
- PromptLock vs Semgrep: Static analysis for code bugs and security, not runtime AI data compliance.
PromptLock FAQ
What counts as a "prompt"?+
Each call to the /v1/analyze endpoint counts as one prompt, regardless of length.
What's included in the dashboard?+
Usage tracking, request history, violation insights and compliance reporting.
Can I upgrade or downgrade anytime?+
Yes, you can change plans at any time with immediate effect and prorated billing.
Do you offer volume discounts?+
Yes, custom pricing is available for more than 500K prompts per month.
What happens if I exceed my limit?+
You’ll be notified before hitting the limit and can upgrade or contact sales for options.
Summarized by DevHunt from promptlock.io · Oct 12, 2026. Details may change; check the official site.
