Logo
chat2sim
Back to Login

Chat2Sim — Privacy Policy

Last Updated: April 13 2026

This Privacy Policy explains how we collect, use, store, and protect your information when you use Chat2Sim ("the Service"). By using the Service, you consent to the practices described below.

1. Data Controller

We operate as the data controller for personal data collected through the Service. For privacy inquiries, contact us at contact@chat2sim.ai.

2. Information We Collect

2.1 Information You Provide

  • Account Information: Name, email address, and password when you register.
  • Payment Information: Billing details when you purchase a plan. Payment processing is handled by third-party providers (e.g., Stripe); we do not store your full credit card number.
  • Simulation Data: Simulation Requests (your natural language descriptions), uploaded files (geometry, CAD models, images, parameters), and any other content you submit through the Service.
  • Communications: Messages you send to us via email or support channels.

2.2 Information Collected Automatically

  • Usage Data: Pages visited, features used, simulation types run, timestamps, session duration, and interaction patterns.
  • Device and Technical Data: IP address, browser type and version, operating system, device identifiers, and screen resolution.
  • Log Data: Server logs recording access times, referring URLs, and error logs.
  • Cookies and Similar Technologies: See Section 8.

2.3 Information from Third Parties

If you sign in through a third-party service (e.g., Google, GitHub), we receive your name, email, and profile information as authorized by that provider's permissions.

3. How We Use Your Information

We use your information for the following purposes:

  • Providing the Service: Processing your Simulation Requests, generating configurations, executing simulations, and delivering results.
  • Account Management: Creating and managing your account, authenticating your identity, and communicating with you about your account.
  • Payment Processing: Processing transactions, sending invoices, and managing subscriptions.
  • Service Improvement: Analyzing usage patterns, diagnosing technical issues, and improving the Service's performance and features.
  • AI Model Improvement: Using anonymized and aggregated simulation data to train and improve our AI agent. See Section 5 for details and opt-out options.
  • Communications: Sending service-related notifications, security alerts, and (with your consent) marketing communications.
  • Safety and Compliance: Detecting and preventing fraud, abuse, or violations of our Terms of Service, and complying with legal obligations.

4. Legal Basis for Processing (GDPR)

If you are in the European Economic Area (EEA), the United Kingdom, or Switzerland, our legal bases for processing your personal data are:

  • Contract Performance: Processing necessary to provide the Service you requested (account management, simulation execution, payment processing).
  • Legitimate Interests: Analytics, service improvement, fraud prevention, and security — where these interests are not overridden by your data protection rights.
  • Consent: Marketing communications and optional data uses. You may withdraw consent at any time.
  • Legal Obligation: Processing required to comply with applicable laws, regulations, or legal processes.

5. AI Training and Simulation Data

5.1 Paid Plans

For users on paid plans, we do not use your Simulation Requests, uploaded geometry, or Simulation Results to train our AI models unless you expressly opt in. We may use anonymized, aggregated metadata (such as solver performance metrics, convergence statistics, and error rates) that cannot be linked back to your specific simulations.

5.2 Free Tier

By using the Free Tier, you agree that we may use your Simulation Requests, uploaded content, Simulation Configurations, and Simulation Results to train, improve, and develop our AI agent. Free Tier simulation data and results may also be made publicly accessible. If your data is confidential or proprietary, do not use the Free Tier.

5.3 Opt-Out

Paid plan users who have previously opted in to AI training may opt out at any time by contacting us at contact@chat2sim.ai or adjusting their account settings. Opting out does not affect the lawfulness of processing performed prior to the opt-out.

6. How We Share Your Information

We do not sell, rent, or trade your personal information. We share your information only in the following circumstances:

  • Service Providers: With third-party providers who process data on our behalf to operate the Service (cloud infrastructure, payment processing, analytics, customer support). These providers are contractually required to protect your data and may only use it as directed by us.
  • Legal Requirements: When required by law, regulation, legal process, or governmental request (such as a court order or subpoena). Where legally permitted, we will notify you before disclosing your data.
  • Safety and Enforcement: To protect the rights, property, or safety of Chat2Sim, our users, or others, and to enforce our Terms of Service.
  • Business Transfers: In connection with a merger, acquisition, reorganization, or sale of assets, your data may be transferred. We will notify you before your data becomes subject to a different privacy policy.
  • With Your Consent: For any other purpose, with your explicit consent.

7. Data Processors and Infrastructure

We work with the following categories of third-party data processors:

| Category | Purpose | Examples | |----------|---------|----------| | Cloud Infrastructure | Simulation execution, data storage | [e.g., AWS, GCP, Azure] | | Payment Processing | Subscription and payment management | [e.g., Stripe] | | Analytics | Usage analysis and service improvement | [e.g., Google Analytics, PostHog] | | Authentication | Account login and SSO | [e.g., Auth0, Google OAuth] | | Communications | Email notifications and support | [e.g., SendGrid, Intercom] |

All data processors are contractually bound to process your data only for the purposes we define and in compliance with applicable data protection laws.

8. Cookies and Tracking Technologies

We use cookies and similar technologies for the following purposes:

  • Essential Cookies: Required for the Service to function (authentication, session management, security).
  • Analytics Cookies: Help us understand usage patterns and improve the Service.
  • Preference Cookies: Remember your settings and preferences.

We do not use advertising or third-party tracking cookies.

You can manage cookie preferences through your browser settings. Disabling essential cookies may affect Service functionality. When visiting for the first time, we will ask for your cookie consent where required by law.

9. Data Retention

We retain your data for the following periods:

| Data Type | Retention Period | |-----------|-----------------| | Account information | Until account deletion, plus [30] days | | Simulation Results and files | [30] calendar days from delivery, then deleted | | Uploaded geometry and CAD files | Until account deletion | | Simulation Requests (text) | Until account deletion | | Payment records | As required by applicable tax and accounting laws | | Usage and log data | [12] months | | Free Tier simulation data | [14] calendar days, then deleted |

After the applicable retention period, we delete or anonymize your data. Certain data may be retained longer if required by law or for the resolution of disputes.

10. Data Security

We implement appropriate technical and organizational measures to protect your data, including:

  • Encryption in transit (TLS/HTTPS) and at rest.
  • Access controls limiting personnel access to data on a need-to-know basis.
  • Regular security assessments and infrastructure monitoring.
  • Secure deletion of data upon expiry of retention periods.

No method of transmission or storage is 100% secure. While we strive to protect your data, we cannot guarantee absolute security. You are responsible for maintaining the confidentiality of your account credentials.

11. International Data Transfers

Your data may be processed and stored in countries other than your own, including countries that may not provide the same level of data protection. When transferring data outside the EEA, UK, or Switzerland, we use appropriate safeguards such as Standard Contractual Clauses (SCCs) approved by the European Commission, or rely on other lawful transfer mechanisms.

By using the Service, you consent to the transfer and processing of your data in the jurisdictions where we or our service providers operate.

12. Your Rights

Depending on your location and applicable law, you may have the following rights:

  • Access: Request a copy of the personal data we hold about you.
  • Rectification: Request correction of inaccurate or incomplete data.
  • Deletion: Request deletion of your personal data. You can delete your account through your account settings or by contacting us.
  • Data Portability: Request your data in a structured, machine-readable format.
  • Restriction: Request that we restrict processing of your data in certain circumstances.
  • Objection: Object to processing based on legitimate interests.
  • Withdraw Consent: Where processing is based on consent, withdraw it at any time.
  • Opt-Out of Marketing: Unsubscribe from marketing emails via the link in each email or through your account settings.

For US residents:

  • California (CCPA/CPRA): You have the right to know what personal information we collect, request deletion, and opt out of the sale of personal information. We do not sell personal information.
  • Other US states: Additional rights may apply under state privacy laws (Virginia VCDPA, Colorado CPA, Connecticut CTDPA, etc.).

To exercise any of these rights, contact us at contact@chat2sim.ai. We will respond within [30] days (or as required by applicable law). We may verify your identity before processing your request.

13. Children's Privacy

The Service is not intended for anyone under 18. We do not knowingly collect personal data from children. If we learn that we have collected data from a child under 18 (or under 13 where applicable), we will delete it promptly. If you believe a child has provided us with personal data, contact us immediately at [privacy email].

14. Third-Party Links

The Service may contain links to third-party websites or services. We are not responsible for the privacy practices of those third parties. We encourage you to review their privacy policies.

15. Changes to This Policy

We may update this Privacy Policy from time to time. Material changes will be communicated via email or on-site notification at least [14] calendar days before taking effect. Continued use after the effective date constitutes acceptance. We encourage you to review this Policy periodically.

16. Contact Us

For privacy questions, data requests, or complaints:

Email: contact@chat2sim.ai

If you are in the EEA and are not satisfied with our response, you have the right to lodge a complaint with your local Data Protection Authority.

End of Privacy Policy