SaaS Startups

Customer Data Stays on Your
Startup's Machines.

Your developers paste API keys into ChatGPT. Your founders paste internal architecture docs into Claude to answer security questionnaires. Your support team pastes customer billing records into Copilot. Shield sits on your team's laptops and stops sensitive data from ever reaching an external AI model. No cloud. No vendor access. Just a local proxy that redacts secrets, PII, and infrastructure details before they leave your startup's network.

See How Shield Works See Data Redaction in Action

Quick Answer

Shield for SaaS Startups is a local desktop application that keeps customer PII, API keys, database credentials, and internal infrastructure details from ever leaving your team's computers, before that data reaches ChatGPT, Claude, Copilot, or any AI model. It helps your startup pass enterprise security questionnaires, protect your SOC 2 and ISO 27001 posture, and keep EU customer data local for GDPR, all without adding cloud infrastructure or slowing down your developers, support engineers, or founders.

Every Startup

That sells to enterprise faces security reviews

The moment a startup lands its first enterprise prospect, the security questionnaire arrives, often 30 to 60 pages covering data handling, access controls, encryption, incident response, and third-party risk. These questionnaires are not optional. Passing them is a prerequisite for closing the deal. Every answer you provide reveals details about your internal infrastructure, and if you're using AI to draft those answers faster, you may be exposing the very architecture you're trying to protect.

Industry standard enterprise procurement process

SOC 2 / ISO 27001 / GDPR

Compliance frameworks startups navigate simultaneously

A single B2B SaaS startup often faces requirements from SOC 2 (for US enterprise customers), ISO 27001 (for international prospects), and GDPR (for EU/EEA users, even on a free tier). Each framework imposes data protection obligations. Shield provides a single technical control that supports compliance across all three frameworks: redact sensitive data before it leaves your machines, keep an audit trail of what was caught, and keep the redaction mapping inside your infrastructure boundary.

Multiple frameworks, AICPA SOC 2, ISO/IEC 27001:2022, GDPR

Zero

Customer data leaves your startup's machines

Shield runs locally on your team's laptops, no cloud processing, no vendor data access. Customer PII, API keys, internal architecture docs, and billing information never reach external AI providers. The redaction mapping stays on your machine, inside your startup's control. This means your SOC 2 auditor can verify data protection without Shield itself becoming part of your trust services boundary.

Shield operates within your infrastructure boundary

One accidental paste can derail your next enterprise deal

Enterprise prospects ask hard questions about data security. When you answer those questions honestly, and use AI to speed up the process. You may be sending internal infrastructure details, customer PII, and API keys directly to external AI providers. If that data leaks, your startup doesn't just lose a deal: it loses trust, potentially violates SOC 2 compliance, and may face GDPR transfer issues. Shield eliminates this risk entirely: sensitive data is redacted on your machine, before it ever leaves your startup's control.

Interactive Demo

What Startup Data Looks Like in AI Prompts

Three real-world scenarios where startup teams send sensitive data to AI models every day. Click each tab to see the raw prompt, and how Shield redacts it before it leaves your network.

Startup Developer Pasting Production Error Into ChatGPT

Before Shield

Getting a 500 error in production. Here's the stack trace: TypeError at /api/customers/checkout, cannot read property 'email' of undefined. Request payload: { customer_id: 'cust_9X7B3Q', email: 'sarah.chen@acmecorp.com', plan: 'enterprise_annual', billing_token: 'tok_visa_4242424242424242', api_key: 'sk_live_xK9mP2vN8wR5tY7qA3bD6fH1jL4', db_host: 'prod-db-cluster.aws.rds.com', db_user: 'admin', db_pass: 'P@ssw0rd2024!' }. Full error context: SELECT * FROM subscriptions WHERE customer_id='cust_9X7B3Q' returned null. This worked last week, what changed?

After Shield

Getting a 500 error in production. Here's the stack trace: [ERROR_TYPE] at [ENDPOINT], [ERROR_MESSAGE]. Request payload: { customer_id: '[CUSTOMER_ID]', email: '[EMAIL]', plan: '[PLAN]', billing_token: '[TOKEN]', api_key: '[API_KEY]', db_host: '[DB_HOST]', db_user: '[DB_USER]', db_pass: '[DB_PASS]' }. Full error context: [SQL_QUERY]. This worked last week, what changed?

Detected (6 matches)

PII, Emailsarah.chen@acmecorp.com

PII, IDcust_9X7B3Q

Secret, API Keysk_live_xK9...

Secret, Tokentok_visa_4242...

Secret, DBprod-db-cluster...

Secret, DBadmin / P@ssw0rd2024!

Compliance

How Shield Maps to Startup Compliance Frameworks

A single B2B SaaS startup often faces requirements from multiple frameworks simultaneously. Shield's local proxy architecture provides a single technical control that supports compliance across SOC 2, ISO 27001, GDPR, and CCPA, without adding cloud dependencies to your audit scope.

Framework	Scope	Key Requirement	How Shield Helps
SOC 2	Service organizations, Trust Services Criteria (security, availability, confidentiality)	Demonstrate controls that protect customer data from unauthorized access, use, or disclosure. CC6.1 specifically addresses logical and physical access controls, including data leaving the organization's boundary via third-party tools.	Provides verifiable evidence that customer data is redacted before reaching external AI providers. Audit logs with cryptographic hashes demonstrate control operation. Because Shield runs locally, it doesn't expand your SOC 2 trust services boundary.
ISO 27001	Information Security Management System (ISMS), global standard	Annex A control A.8.12 (Data Leakage Prevention) requires measures to prevent unauthorized exfiltration of sensitive information. Control A.5.14 requires controls for information transfer.	Serves as a Data Leakage Prevention (DLP) control specifically for the AI channel, catching secrets, PII, and internal infrastructure details before they reach external LLM providers. Audit logs support your ISMS monitoring and measurement requirements.
GDPR	Personal data of EU/EEA residents, any organization, any location	Article 44-49 restrict international data transfers. Sending EU personal data to a US-based AI provider may require Standard Contractual Clauses or an adequacy decision. Additionally, Article 32 requires appropriate technical measures for data security.	Keeps EU personal data local: the AI provider never sees the data, so no international transfer occurs. Redacts customer names, emails, and support ticket content before prompts reach external providers, simplifying your GDPR transfer impact assessment.
CCPA / CPRA	California residents' personal information, applies to for-profit businesses meeting thresholds	Businesses must disclose data sharing practices and honor consumer opt-out requests. Under CPRA, sensitive personal information (including account credentials, payment data) receives enhanced protections. Data shared with third parties (including AI providers used as service providers) must be governed by contract.	Prevents California customer data from being shared with AI providers in the first place, before any disclosure that might require opt-out notices or contractual data processing agreements. Reduces the scope of personal information flowing to third parties.

Architecture

Customer Data Never Leaves Your Startup's Network

Shield runs as a local proxy on your team's laptops. When a developer, founder, or support engineer sends a prompt to an AI model, Shield intercepts it, redacts all API keys, customer PII, database credentials, and internal infrastructure details, and only then forwards the clean prompt to the external LLM. The redaction mapping stays on your machine, inside your startup's control.

Local Installation

Install Shield on any Mac, Windows, or Linux laptop. No cloud infrastructure, no vendor data access, no customer data leaves your team's machines.

One Environment Variable

Set SHIELD_PROXY_URL and every AI call from that machine flows through Shield automatically. Zero code changes to your existing tools, VS Code, terminal, or ChatGPT web.

Full Audit Trail

Every redaction event is logged with a cryptographic hash. Prove to auditors and enterprise prospects exactly what data was caught and when, with tamper-evident integrity.

Configurable Policies

Choose which data categories to redact, API keys, PII, infrastructure URLs. Add custom patterns for your internal hostnames and account ID schemes. Run in audit-only mode to validate coverage first.

FAQ

Common Questions

Small teams have the most to lose from a single data exposure incident. When you're a startup selling to enterprise customers, one accidental leak, an API key in a ChatGPT prompt, a customer's contract details pasted into Claude, can kill a deal that took six months to close. Shield runs locally on every developer and support laptop, takes minutes to set up, and costs a fraction of what one lost enterprise deal is worth. It's the same protection Fortune 500 companies use, packaged for a startup's reality: no compliance team required, no cloud infrastructure to manage.

Enterprise prospects send 30 to 60-page security questionnaires covering everything from encryption standards to employee offboarding. Answering these honestly often means pasting internal architecture docs, team structures, and tool configurations into AI assistants to draft responses faster. Every paste is a potential exposure. Shield redacts internal hostnames, private repo URLs, infrastructure details, and team information before they reach the AI provider, so you can use AI to speed up security reviews without undermining the very security posture you're trying to demonstrate.

Shield operates at the API layer. It sits between your AI client and the LLM provider, not inside any specific SaaS tool. Whether your team uses ChatGPT's web interface, the Claude API via a VS Code extension, or Copilot in the IDE, Shield catches sensitive data as long as the AI request flows through its local proxy. This means Shield works with every AI tool your team already uses, with zero integration work and zero changes to your existing stack.

Yes, but in the right way. Shield is a technical safeguard, not a policy document. Under SOC 2's Common Criteria (specifically CC6.1, Logical and Physical Access Controls), Shield demonstrates that your organization has implemented controls to prevent unauthorized access to customer data. Because Shield operates locally and never transmits data to Purfect Labs servers, it doesn't expand your trust services boundary. Your auditor can verify that sensitive data is redacted before reaching external AI providers, and the audit log gives them tamper-evident evidence of every redaction event.

GDPR applies the moment you process personal data of anyone in the EU or EEA, regardless of where your company is based or whether money changes hands. If a developer pastes an EU customer's name, email, or support ticket into an AI prompt, and that prompt goes to a US-based LLM provider, you've just made an international data transfer that may require Standard Contractual Clauses or an adequacy decision. Shield keeps that data local: the AI provider never sees the EU personal data, so the transfer question doesn't arise. It's a technical safeguard that simplifies your GDPR compliance posture from day one.

Shield installs as a lightweight desktop app on any Mac, Windows, or Linux machine. For a remote team of 5 to 50 people, you share a policy configuration file (via your existing tools, GitHub, Notion, Slack) and each team member installs it locally. A single environment variable routes AI traffic through Shield. If your team grows and you adopt an MDM like Jamf or Kandji later, Shield supports enterprise configuration management, but you don't need MDM to start. One founder can set the whole team up in under 30 minutes.

Shield for Healthcare AI

Protect PHI under HIPAA, clinical notes, billing data, and patient communications.

Shield for Financial Services

Keep account numbers, SSNs, and portfolio data safe under PCI DSS and GLBA.

Shield for E-Commerce

Protect checkout data, customer PII, and support tickets under PCI and GDPR.

Ready to Ship Without the Leaks?

Shield installs in minutes. Your team's API keys, customer PII, and infrastructure details stay on your startup's machines, where your customers, your SOC 2 auditor, and your enterprise prospects expect them to be.

Talk to Our Team How Shield Works

Last updated: July 16, 2026

Customer Data Stays on YourStartup's Machines.