Use ChatGPT Safely.
The local-first privacy layer for ChatGPT and your own apps. Keep your secrets. Keep your AI.
Redact: Detect PII and secrets locally on your device.
Redact: Detect PII and secrets locally on your device.
Proxy: Send only safe, anonymized content.
Proxy: Send only safe, anonymized content.
Rehydrate: Instantly swap placeholders back to real data.
Rehydrate: Instantly swap placeholders back to real data.
for developers and businesses
free forever. No credit card required.
100M+
requests protected automatically.
Personal Data protected
Personal Data protected
The Compliance Gap
Your secrets are leaving the browser.
Employees are pasting sensitive code and customer PII into ChatGPT every day. You shouldn't have to choose between productivity and privacy.
Without rehydra
The "Shadow AI" Risk
Employees paste sensitive data into public models.
API keys and credentials are accidentally sent to LLMs.
Security teams have no logs of what data is leaving the VPC.
IT blocks ChatGPT entirely.
Without rehydra
The "Shadow AI" Risk
Employees paste sensitive data into public models.
API keys and credentials are accidentally sent to LLMs.
Security teams have no logs of what data is leaving the VPC.
IT blocks ChatGPT entirely.
Without rehydra
The "Shadow AI" Risk
Employees paste sensitive data into public models.
API keys and credentials are accidentally sent to LLMs.
Security teams have no logs of what data is leaving the VPC.
IT blocks ChatGPT entirely.
Meet rehydra
The Privacy Shield for GenAI.
rehydra sits between your browser and the LLM provider. We anonymize PII in real-time, in your browser, allowing your team to use AI freely without sensitive data ever leaving your VPC.
Semantic Anonymization
We don't just blur text. We swap sensitive entities (Names, API Keys, CC#) with context-aware placeholders, preserving the AI's ability to reason while hiding the secrets.
Full Observability
Gain a centralized view of which security risks we mitigated in your organization. Deploy our Docker container in your cloud to keep audit logs and encryption keys strictly internal.
Flexible Deployment
One platform. Three ways to stay safe.
Whether you are a solo developer trying to move fast, a CISO securing a thousand seats or just want to stay safe using ChatGPT, Rehydra fits your workflow.
For Individuals
For Developers
For Enterprises
Browser Extension
Use ChatGPT with total peace of mind.
rehydra protects your chats so your secrets never leave your browser.
"I can finally use ChatGPT for client emails without worrying about GDPR."
Privacy mode
Anonymization
Enabled
Type Safety: Strict
Potential deals
$140.4K
VPC Deployment
Monthly PII redactions
790k
32
Policies Active
Generate Revenue Report
Revenue
$120.5K
For Individuals
For Developers
For Enterprises
Browser Extension
Use ChatGPT with total peace of mind.
rehydra protects your chats so your secrets never leave your browser.
"I can finally use ChatGPT for client emails without worrying about GDPR."
Privacy mode
Type Safety: Strict
VPC Deployment
Generate Revenue Report
For Individuals
For Developers
For Enterprises
Browser Extension
Use ChatGPT with total peace of mind.
rehydra protects your chats so your secrets never leave your browser.
"I can finally use ChatGPT for client emails without worrying about GDPR."
Privacy mode
Type Safety: Strict
VPC Deployment
Generate Revenue Report
Pricing & Plans
Plans that grow with you
Free
For individuals
Free forever
Protect your data
100% local processing
Works with ChatGPT
No usage limits
Simple setup, no code required
Pro
For growing teams
Coming Soon!
/mo
Everything in Free
3 users included
Powerful sidecar proxy
Advanced analytics & insights
Priority email support
Enterprise
For large business
Contact Us
Everything in Pro
Unlimited team seats
Dedicated success manager
Custom API integrations
Advanced security & compliance
Free
For individuals
Free forever
Protect your data
100% local processing
Works with ChatGPT
No usage limits
Simple setup, no code required
Pro
For growing teams
Coming Soon!
/mo
Everything in Free
3 users included
Powerful sidecar proxy
Advanced analytics & insights
Priority email support
Enterprise
For large business
Contact Us
Everything in Pro
Unlimited team seats
Dedicated success manager
Custom API integrations
Advanced security & compliance
Free
For individuals
Free forever
Protect your data
100% local processing
Works with ChatGPT
No usage limits
Simple setup, no code required
Pro
For growing teams
Coming Soon!
/mo
Everything in Free
3 users included
Powerful sidecar proxy
Advanced analytics & insights
Priority email support
Enterprise
For large business
Contact Us
Everything in Pro
Unlimited team seats
Dedicated success manager
Custom API integrations
Advanced security & compliance
Product Launch
Introducing Rehydra: The Privacy Layer for the AI Stack
Nov 4, 2025
Product Launch
Introducing Rehydra: The Privacy Layer for the AI Stack
Nov 4, 2025
Product Launch
Introducing Rehydra: The Privacy Layer for the AI Stack
Nov 4, 2025
Engineering
Semantic Redaction vs. Regex: Why Context Matters for PII.
Dec 31, 2025
Engineering
Semantic Redaction vs. Regex: Why Context Matters for PII.
Dec 31, 2025
Engineering
Semantic Redaction vs. Regex: Why Context Matters for PII.
Dec 31, 2025
FAQ
Frequently Asked Questions
Does rehydra store or see my unredacted data?
No. We operate on a strict "Zero-Trust" architecture. Redaction happens locally in your browser or inside your own VPC sidecar. We never store your raw prompts or your PII—we only process the anonymized tokens.
Will anonymizing data confuse the AI model?
Not at all. We use Semantic Anonymization. Instead of blacking out text, we swap sensitive entities with context-aware placeholders persisting non-idenitiable information. This preserves the sentence structure so the LLM can reason correctly without knowing the secrets.
How does this help with GDPR and EU AI Act compliance?
rehydra acts as a technical safeguard for data sovereignty. By stripping PII before the request leaves your device, you ensure that no personal data is transferred to US-hosted LLM providers, significantly reducing your compliance scope.
Which LLMs and platforms do you support?
We are striving to be model-agnostic. Currently we support chatgpt.com and the OpenAI API. In future the browser extension will work natively with ChatGPT, Claude, and Gemini. For developers, our SDKs will allow you to wrap calls to OpenAI, Azure, or any custom endpoint with just two lines of code.
Can we deploy Rehydra in our own private cloud (VPC)?
Yes. For enterprise teams, we offer the rehydra Sidecar—a Docker container you deploy within your own infrastructure. This gives you full control over encryption keys, audit logs, and network egress rules.
Does this add latency to my chat experience?
It is imperceptible. Our local processing engine is built in Bun and adds less than 40ms to the request loop. You get enterprise-grade security with consumer-grade speed.
Does rehydra store or see my unredacted data?
No. We operate on a strict "Zero-Trust" architecture. Redaction happens locally in your browser or inside your own VPC sidecar. We never store your raw prompts or your PII—we only process the anonymized tokens.
Will anonymizing data confuse the AI model?
Not at all. We use Semantic Anonymization. Instead of blacking out text, we swap sensitive entities with context-aware placeholders persisting non-idenitiable information. This preserves the sentence structure so the LLM can reason correctly without knowing the secrets.
How does this help with GDPR and EU AI Act compliance?
rehydra acts as a technical safeguard for data sovereignty. By stripping PII before the request leaves your device, you ensure that no personal data is transferred to US-hosted LLM providers, significantly reducing your compliance scope.
Which LLMs and platforms do you support?
We are striving to be model-agnostic. Currently we support chatgpt.com and the OpenAI API. In future the browser extension will work natively with ChatGPT, Claude, and Gemini. For developers, our SDKs will allow you to wrap calls to OpenAI, Azure, or any custom endpoint with just two lines of code.
Can we deploy Rehydra in our own private cloud (VPC)?
Yes. For enterprise teams, we offer the rehydra Sidecar—a Docker container you deploy within your own infrastructure. This gives you full control over encryption keys, audit logs, and network egress rules.
Does this add latency to my chat experience?
It is imperceptible. Our local processing engine is built in Bun and adds less than 40ms to the request loop. You get enterprise-grade security with consumer-grade speed.
Does rehydra store or see my unredacted data?
No. We operate on a strict "Zero-Trust" architecture. Redaction happens locally in your browser or inside your own VPC sidecar. We never store your raw prompts or your PII—we only process the anonymized tokens.
Will anonymizing data confuse the AI model?
Not at all. We use Semantic Anonymization. Instead of blacking out text, we swap sensitive entities with context-aware placeholders persisting non-idenitiable information. This preserves the sentence structure so the LLM can reason correctly without knowing the secrets.
How does this help with GDPR and EU AI Act compliance?
rehydra acts as a technical safeguard for data sovereignty. By stripping PII before the request leaves your device, you ensure that no personal data is transferred to US-hosted LLM providers, significantly reducing your compliance scope.
Which LLMs and platforms do you support?
We are striving to be model-agnostic. Currently we support chatgpt.com and the OpenAI API. In future the browser extension will work natively with ChatGPT, Claude, and Gemini. For developers, our SDKs will allow you to wrap calls to OpenAI, Azure, or any custom endpoint with just two lines of code.
Can we deploy Rehydra in our own private cloud (VPC)?
Yes. For enterprise teams, we offer the rehydra Sidecar—a Docker container you deploy within your own infrastructure. This gives you full control over encryption keys, audit logs, and network egress rules.
Does this add latency to my chat experience?
It is imperceptible. Our local processing engine is built in Bun and adds less than 40ms to the request loop. You get enterprise-grade security with consumer-grade speed.
Start building safely
The privacy layer for the AI era.
Start building safely
The privacy layer for the AI era.
Start building safely
The privacy layer for the AI era.