Privacy Policy
Last updated: February 5, 2026
1. Introduction
ModelStack ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our AI model orchestration platform and API services.
2. Information We Collect
2.1 Account Information
When you create an account, we collect:
- Email address
- Name (if provided)
- Authentication credentials (encrypted)
- OAuth provider data (if using Google sign-in)
2.2 Usage Data
We collect information about your API usage:
- API key metadata and request counts
- Model selection and parameters
- Billing and usage metrics
- Error logs and performance data
2.3 Zero-Log Policy
Important: We do NOT log, store, or inspect the content of your API requests and responses. Your prompts, completions, and model outputs are never persisted on our servers.
3. How We Use Your Information
We use collected information to:
- Provide and maintain our API services
- Process billing and payments
- Monitor usage and prevent abuse
- Improve service performance and reliability
- Communicate service updates and security notices
- Comply with legal obligations
4. Data Sharing and Disclosure
We do not sell your personal information. We may share data only in these circumstances:
- Upstream AI Providers: API requests are forwarded to model providers (OpenAI, Anthropic, etc.) per your selection
- Service Providers: Payment processors, hosting infrastructure (Cloudflare)
- Legal Requirements: When required by law or to protect our rights
5. Data Security
We implement industry-standard security measures including encryption in transit (TLS 1.3), encrypted storage, API key hashing, and secure authentication. However, no method of transmission over the internet is 100% secure.
6. Data Retention
Account data is retained while your account is active. API usage metadata is retained for billing and compliance purposes for 12 months. You may request account deletion at any time.
7. Your Rights
You have the right to:
- Access your personal data
- Correct inaccurate data
- Request deletion of your account
- Export your usage data
- Opt out of marketing communications
8. Contact Us
For privacy-related questions or to exercise your rights, contact us at privacy@modelstack.cc
9. Changes to This Policy
We may update this Privacy Policy periodically. We will notify you of material changes via email or service notification.