Terms of Service

Effective Date: August 15, 2025

1. About These Terms

These Terms of Service ("Terms") govern your use of Twill, the AI-native project management platform connected to your codebase, operated by Chainlit SAS, a company incorporated in France ("we," "us," or "our").
By accessing or using Twill, you agree to be bound by these Terms. If you don't agree to these Terms, please don't use our service.

2. Our Service

Twill is an AI-powered project management platform that:
  • Clarifies engineering intent into detailed specifications
  • Creates and manages project tickets
  • Dispatches work to AI coding agents in parallel
  • Connects to your codebase via GitHub integration
  • Helps teams write better specifications for more reliable AI-powered development

3. Account Registration and Eligibility

3.1 Eligibility

By using our service, you represent that you have the legal capacity to enter into this agreement.

3.2 Account Information

You're responsible for:
  • Providing accurate account information
  • Maintaining the security of your account credentials
  • All activities that occur under your account
  • Notifying us immediately of any unauthorized use

4. Subscription Plans and Payments

4.1 Plan Types

We offer both free (freemium) and paid subscription plans. Features and usage limits vary by plan type.

4.2 Billing

You can cancel your subscription at any time through your account settings.

4.3 Free Trial and Freemium

Free plans and trials are subject to usage limitations and may not include all features available to paid subscribers.

5. Acceptable Use

5.1 Permitted Uses

You may use Twill for legitimate business and personal project management purposes in compliance with these Terms and applicable laws.

5.2 Prohibited Uses

You may not:
  • Use Twill for any illegal activities
  • Attempt to gain unauthorized access to our systems
  • Use our service to harass, abuse, or harm others
  • Upload malicious code or content
  • Reverse engineer, decompile, or disassemble our software
  • Resell or redistribute our service without permission
  • Use automated tools to access our service without permission

6. GitHub Integration

6.1 Permissions

Twill requests read-only access to your GitHub repositories. We use this access solely to:
  • Read repository structure and code for AI analysis
  • Generate specifications based on your codebase
  • Provide contextual project management features

6.2 GitHub Terms

Your use of GitHub through Twill is also subject to GitHub's Terms of Service. You're responsible for ensuring you have proper permissions for any repositories you connect.

7. AI and Data Processing

7.1 AI Services

Twill uses artificial intelligence services (including Anthropic's AI models) to analyze your code and generate specifications. By using our service, you consent to this processing.

7.2 AI Limitations

  • AI-generated content may contain errors or inaccuracies
  • You're responsible for reviewing and validating all AI-generated specifications
  • We don't guarantee the accuracy, completeness, or reliability of AI outputs

7.3 Sandbox Environments and Security

Twill executes AI-generated code in isolated sandbox environments provided by third-party services (including Modal and Daytona). While we implement security measures including:
  • Isolated execution environments with resource quotas (CPU, memory, disk) provided by sandbox providers
  • GitHub access controls enforced by Twill's application code—agents cannot directly push code and are limited to reading code and creating pull requests (users retain control over merging)
  • Encrypted storage of secrets using industry-standard AES-256-GCM encryption
  • HMAC-SHA256 signature verification for GitHub webhook communications
These measures reduce but cannot eliminate all security risks inherent in AI code execution.

7.4 Security Limitations and User Responsibility

You acknowledge and accept that:
  • Code Execution Risks: AI agents may generate and execute code that behaves unexpectedly. You are responsible for reviewing code before merging it into production systems.
  • Environment Variable Exposure: While we encrypt secrets at rest and isolate sandbox environments, we cannot guarantee complete protection against inadvertent exposure of environment variables or secrets.
  • Prompt Injection: Despite our input sanitization measures, AI systems may be susceptible to prompt injection attacks. We are not liable for any actions taken by AI agents as a result of malicious or unintended prompt manipulation.
  • Third-Party Services: Sandbox environments are provided by third-party services (Modal, Daytona) with their own security policies and limitations.
YOU USE TWILL'S AI CODE EXECUTION FEATURES AT YOUR OWN RISK. WE STRONGLY RECOMMEND:
  • Not storing production credentials in Twill sandboxes
  • Reviewing all AI-generated code before deployment
  • Using separate, non-production environments for AI agent activities
  • Implementing additional security reviews for sensitive operations

8. Intellectual Property

8.1 Your Content

You retain ownership of all content you submit to Twill, including code, specifications, and project data. You grant us a limited license to use this content solely to provide our services.

8.2 Our Service

Twill's software, features, and related intellectual property are owned by Chainlit SAS and protected by copyright, trademark, and other laws.

9. Privacy and Data Protection

Your privacy is important to us. Please review our Privacy Policy, which explains how we collect, use, and protect your information.

10. Service Availability

10.1 Uptime

While we strive for high availability, we don't guarantee that Twill will be available 100% of the time. We may perform maintenance that temporarily interrupts service.

10.2 Changes to Service

We may modify, suspend, or discontinue any part of Twill at any time with reasonable notice.

11. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW:
  • OUR LIABILITY TO YOU IS LIMITED TO THE AMOUNT YOU PAID FOR TWILL IN THE 12 MONTHS PRECEDING THE CLAIM
  • WE ARE NOT LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES
  • WE PROVIDE TWILL "AS IS" WITHOUT WARRANTIES OF ANY KIND
  • WE ARE NOT LIABLE FOR ANY DATA BREACHES, CODE LEAKS, ENVIRONMENT VARIABLE EXPOSURE, OR SECURITY INCIDENTS ARISING FROM:
    • AI agent behavior or generated code
    • Third-party sandbox provider vulnerabilities
    • Prompt injection or other AI manipulation attacks
    • User misconfiguration of secrets or permissions

12. Termination

12.1 Termination by You

You may terminate your account at any time by contacting us or using account settings.

12.2 Termination by Us

We may terminate or suspend your access if you violate these Terms or for any reason with reasonable notice.

12.3 Effect of Termination

Upon termination, your right to use Twill stops immediately. We may delete your data according to our data retention policies.

13. Governing Law and Disputes

These Terms are governed by French law. Any disputes will be subject to the jurisdiction of French courts.

14. Contact Us

If you have questions about these Terms, please contact us at:
Chainlit SAS
Email: dan@twill.ai

15. Changes to Terms

We may update these Terms from time to time. We'll notify you of material changes by email or through the service. Your continued use after changes take effect constitutes acceptance of the new Terms.
Last updated: August 15, 2025