Terms of Service

Our Terms of Use outline how we collect, use, and protect your personal information. Your privacy and security are our top priorities.

Last Updated on December, 09, 2025

Acceptance of Terms

Welcome to Stage Zero Health! By creating an account, accessing, or using our services, you agree to these Terms and Conditions ("Terms"). If you don't agree with any part of these Terms, please don't use our services.

These Terms constitute a legally binding agreement between you and Stage Zero Health, PBC, a Delaware Public Benefit Corporation headquartered in Cambridge, Massachusetts.


1. Eligibility

You must be at least 18 years old to use Stage Zero Health. By using our services, you represent and warrant that:

  • You are at least 18 years of age

  • You have the legal capacity to enter into this agreement

  • You are not prohibited from using our services under any applicable laws

  • You will provide accurate and complete information


2. Changes to Terms

We may update these Terms from time to time. We'll notify you of material changes via email or through our platform at least 30 days before they take effect. Your continued use after changes means you accept the new Terms.

Description of Services

Stage Zero Health provides personalized cancer risk assessments and educational recommendations based on your health data. Our services help you understand your cancer risk factors and suggest evidence-based screening schedules.


1. What We Provide

  • Integrated Cancer Risk Score: A personalized assessment based on your health profile

  • Educational Content: Evidence-based information about cancer prevention

  • Screening Recommendations: Suggested timelines for various cancer screenings

  • Risk Factor Analysis: Insights into modifiable and non-modifiable risk factors

  • Progress Tracking: Tools to monitor your prevention journey


2. What We DON'T Provide

We do not provide medical services. Stage Zero Health does not:

  • Diagnose cancer or any medical conditions

  • Prescribe treatments or medications

  • Replace consultations with healthcare providers

  • Provide emergency medical services

  • Offer genetic counseling or testing


3. Accuracy and Limitations

While we strive for accuracy, our risk assessments:

  • Are based on statistical analysis and population data

  • Individual results may vary

  • Are educational estimates, not medical predictions

  • Depend on the accuracy of information you provide

  • May not account for all individual risk factors

  • Should be discussed with your healthcare provider

Medical Disclaimer and Health Information

Not a substitute for medical care. The information provided by Stage Zero Health is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment.


1. No Doctor-Patient Relationship

Using Stage Zero Health does not create a doctor-patient relationship. We are a technology platform that provides educational health information, not a medical practice.


2. Emergency Situations

If you have a medical emergency, call 911 immediately. Stage Zero Health is not designed for urgent or emergency situations.

Signs that may require immediate medical attention include, but are not limited to:

  • Unexplained lumps or masses

  • Persistent pain or discomfort

  • Unexplained weight loss

  • Changes in bowel or bladder habits

  • Unusual bleeding or discharge


3. AI and Technology Limitations

Some features of our service use artificial intelligence and machine learning algorithms. These technologies:

  • Are tools to assist in risk assessment, not diagnostic instruments

  • May have inherent biases or limitations

  • Require human oversight and interpretation

  • Should not be the sole basis for health decisions


4. Your Responsibilities

By using our services, you acknowledge that:

  • You will consult healthcare providers for medical advice

  • You will not delay seeking medical care based on our assessments

  • You understand our limitations as an educational platform

  • You will provide accurate health information for assessments

User Accounts

1. Account Creation

To use Stage Zero Health, you must create an account. You agree to:

  • Provide accurate, current, and complete information

  • Maintain and update your information as needed

  • Keep your password secure and confidential

  • Notify us immediately of any unauthorized access

  • Accept responsibility for all activities under your account


  1. Account Security

You are responsible for maintaining the security of your account. We recommend:

  • Using a strong, unique password

  • Enabling two-factor authentication when available

  • Not sharing your login credentials

  • Logging out when using shared devices


3. Account Suspension or Termination

We may suspend or terminate your account if:

  • You violate these Terms

  • You provide false or misleading information

  • You engage in fraudulent activities

  • You misuse our services or harm other users

We'll notify you before suspension unless immediate action is required for security reasons.

Subscriptions and Payments

1. Free Trial

Three-week free trial. New users receive a 3-week free trial. No payment information is required to start. You can cancel anytime during the trial without any charges.


2. Subscription Plans

  • Monthly plan: $19.99 per month, billed monthly

  • Annual plan: $199 per year, billed annually (save $40.88 - 17% off)


3. Billing and Auto-Renewal

After your free trial ends, your subscription will automatically begin and renew based on your selected plan:

  • Monthly plans renew every month

  • Annual plans renew every year

  • Renewal occurs on the same date as your initial payment

  • We'll send reminder emails before renewal


4. Payment Methods

We accept:

  • Major credit cards (Visa, Mastercard, American Express, Discover)

  • Debit cards with Visa or Mastercard logos

  • Digital wallets (Apple Pay, Google Pay)


5. Cancellation Policy

You can cancel your subscription anytime:

  • Cancel through your account settings

  • Cancellation takes effect at the end of your current billing period

  • You'll retain access until the end of your paid period

  • No partial refunds for unused time in a billing period


6. Refund Policy

Thirty-day money-back guarantee. If you're not satisfied within 30 days of your first payment, contact us for a full refund. This applies only to your first paid subscription period.


  1. Price Changes

We may adjust prices with 30 days' notice. Price changes will apply at your next renewal. You can cancel before the change takes effect.

Prohibited Uses

You agree not to use Stage Zero Health for any unlawful purpose or in any way that could harm our services, users, or reputation.


1. Misuse of Services

You may not:

  • Use our services for any illegal or unauthorized purpose

  • Provide false health information or impersonate another person

  • Share your account with others or create multiple accounts

  • Use our services to diagnose or treat others

  • Resell or commercially exploit our services


2. Interfere with Our Platform

You may not:

  • Attempt to gain unauthorized access to our systems

  • Use automated tools to scrape or collect data

  • Introduce viruses, malware, or harmful code

  • Overwhelm our servers with excessive requests

  • Bypass any security or authentication measures


3. Harm Others

You may not:

  • Harass, threaten, or intimidate other users

  • Collect or store personal data about other users

  • Provide medical advice to other users

  • Share content that is harmful, offensive, or discriminatory

Intellectual Property Rights

1. Our Content

All content on Stage Zero Health, including text, graphics, logos, algorithms, and software, is owned by Stage Zero Health or our licensors and is protected by intellectual property laws.

You may not:

  • Copy, modify, or distribute our content without permission

  • Use our trademarks or logos without authorization

  • Reverse engineer our algorithms or software

  • Create derivative works based on our services


2. Your Content

You retain ownership of the health information you provide. By using our services, you grant us a license to:

  • Use your data to provide our services and calculate risk scores

  • Store and back up your information securely

  • Use anonymized and aggregated data for research and improvement

  • Share your data as described in our Privacy Policy


3. Feedback

If you provide feedback or suggestions, you grant us the right to use them without compensation or attribution.

Privacy and Data Protection

Your privacy is fundamental to our mission. Our Privacy Policy explains how we collect, use, and protect your information.


1. Data We Collect

We collect:

  • Health information you provide for risk assessments

  • Account information and preferences

  • Usage data to improve our services

  • Technical data for security and performance


2. Data Security

We implement industry-standard security measures, including:

  • End-to-end encryption for sensitive data

  • Regular security audits and updates

  • Strict access controls and monitoring

  • Compliance with healthcare data standards


3. Your Data Rights

You have the right to:

  • Access your personal data

  • Correct inaccurate information

  • Delete your account and data

  • Export your data in standard formats

  • Opt out of non-essential data uses

Limitation of Liability

1. Disclaimer of Warranties

Stage Zero Health is provided "as is" without warranties of any kind, express or implied. We do not warrant that our services will be uninterrupted, error-free, or completely secure.


2. Limitation of Liability

To the fullest extent permitted by law, Stage Zero Health's total liability for any claims under these Terms shall not exceed the greater of:

  • The amount you paid us in the 12 months before the claim arose, or

  • $500


3. No Liability for Certain Damages

We shall not be liable for any:

  • Indirect, incidental, special, consequential, or punitive damages

  • Lost profits, lost data, or loss of goodwill

  • Health outcomes or decisions you make based on our educational information

Always consult healthcare professionals for medical decisions.


4. Indemnification

You agree to indemnify and hold Stage Zero Health harmless from any claims arising from:

  • Your use of our services

  • Your violation of these Terms

  • Your violation of any third-party rights

  • Any content or information you provide

Dispute Resolution

1. Informal Resolution

We prefer to resolve disputes informally. Before filing any formal proceedings, please contact us at support@stage0.ai to attempt resolution. We'll work with you in good faith to address your concerns.


2. Arbitration Agreement

You have a 30-day opt-out right. You have 30 days from first using our services to opt out of arbitration by emailing legal@stage0.ai with "Arbitration Opt-Out" in the subject line.

If we can't resolve disputes informally, they will be resolved through binding arbitration, except that:

  • You may bring claims in small claims court

  • Either party may seek injunctive relief in court

  • You opted out within 30 days


3. Arbitration Process

  • Arbitration will be conducted by JAMS under its Streamlined Arbitration Rules

  • Arbitration will be held in Boston, Massachusetts, or via video conference

  • Each party bears their own attorney fees unless the arbitrator determines otherwise

  • The arbitrator's decision is final and binding

  • Class actions and representative actions are waived


4. Time Limitation

Any claim must be filed within one year after it arises. This limitation applies regardless of any statute of limitations to the contrary.


5. Governing Law

These Terms are governed by Massachusetts law, without regard to conflict of law principles.

General Provisions

1. Entire Agreement

These Terms, along with our Privacy Policy, constitute the entire agreement between you and Stage Zero Health.


2. Severability

If any provision is found unenforceable, the remaining provisions will continue in effect.


3. No Waiver

Our failure to enforce any provision doesn't waive our right to enforce it later.


4. Assignment

You may not assign these Terms without our consent. We may assign our rights to any successor or affiliate.


5. Notice

We will send notices to your registered email. You may send notices to:

Stage Zero Health, PBC
Attention: Legal Department
Cambridge, MA 02139
Email: support@stage0.ai

Contact Us

If you have questions about these Terms, please contact us:

Email: support@stage0.ai
Website: www.stagezerohealth.com