Sensitive data is reaching your AI. That stops now.
Every prompt your team sends to an LLM can contain names, SSNs, email addresses, and more. NOI is a reverse proxy that detects and tokenizes sensitive data before it reaches the LLM, and detokenizes on the way back. One line of code. Automatic PII protection for every prompt.
# Before: PII goes straight to OpenAI
client = OpenAI(api_key="sk-...")# After: PII is intercepted and tokenized by NOπI
client = OpenAI(
api_key="sk-...",
base_url="https://api.nopii.co"
)Designed for regulated environments
How it works
Three steps between your app and any LLM. Fully transparent, fully automatic.
Detect & Tokenize
Incoming requests are scanned for PII, including names, emails, SSNs, addresses, and more. Each value is replaced with a deterministic, format-preserving token before the request is sent to the LLM.
Forward Sanitized
The sanitized payload is forwarded to any supported LLM provider (OpenAI, Anthropic, Google, and others) using the caller's own API key. The provider works with tokens in place of the PII NOI detected.
Detokenize & Return
The LLM response flows back through the proxy. Tokens are mapped back to original values and the fully restored response is returned to your application, seamlessly.
Try it yourself
See how NOI detects, tokenizes, and restores personally identifiable information in real time.
Choose an example or write your own:
Why NOI
Speed, intelligence, and trust in one integration.
Speed
One line of code. Time-to-protection under 5 minutes. No SDK, no middleware rewrite, no architecture decisions. Just change your base_url and ship.
Intelligence
Deterministic tokenization preserves entity relationships across messages. Context phrase neutralization prevents LLM safety refusals on tokenized data.
Trust
PCI Level 1 and SOC 2 Type II certified infrastructure. Full audit trail for every request. Fail-safe by default. If PII protection can't run, the request is blocked instead of sent.
Fail-safe by design.
If PII detection or tokenization can't complete, the proxy blocks the request instead of sending it through unprotected. Vault tokens expire automatically based on configurable retention policies, so tokenized data is never retained longer than necessary. Every detection is recorded in a full audit trail: the entity type, a masked value, and the token that replaced it. You get clear visibility into what was protected before it reached an external AI provider.
One proxy. Every provider.
Switch providers without reconfiguring your security.
Why not build it yourself?
You could. Here’s what that looks like.
- 3–6 engineers dedicated to PII infrastructure
- 6–12 months to production-grade system
- Ongoing maintenance as LLM APIs evolve
- Compliance certification is your responsibility
- Streaming support requires deep protocol work
- One line of code: change your base_url
- Protected in under 5 minutes
- Managed service, always up to date
- PCI Level 1 certified infrastructure included
- Native SSE streaming for OpenAI & Anthropic
Built for your industry
Every sector has unique compliance pressures. NOI adapts to all of them.
Healthcare
Protect PHI in clinical notes, patient communications, and medical record summarization without blocking AI adoption.
Learn more →Financial Services
Keep account numbers, transaction details, and customer identities out of third-party models while enabling intelligent automation.
Learn more →Legal
Redact client names, case details, and privileged information before sending documents to AI for review or summarization.
Learn more →Customer Support
Power AI-assisted support workflows without exposing customer PII to external LLM providers.
Learn more →HR & People Operations
AI-powered people analytics without employee data leaving your environment. Tokenize names, salaries, and performance data automatically.
Learn more →Ready to use AI without the risk?
One line of code. Full audit trail. Works with every major LLM provider.