Terms of Service
Last updated: January 18, 2026
These Terms of Service ("Terms") govern your access to and use of the Citadel AI Security Gateway service provided by Nine Suns Inc. ("Mighty," "we," "us," or "our"). By using our service, you agree to these Terms.
1. Acceptance of Terms
By accessing or using Citadel, you agree to be bound by these Terms and our Privacy Policy. If you are using the service on behalf of an organization, you represent that you have authority to bind that organization to these Terms.
2. Description of Service
Citadel is an AI security gateway that provides prompt injection detection, threat scanning, and security analytics for AI applications. We offer:
- Real-time threat detection API
- Multimodal content scanning
- Security analytics and reporting
- Confidential compute processing (Enterprise)
3. Account Registration
To use Citadel, you must create an account with accurate, complete information. You are responsible for:
- Maintaining the confidentiality of your account credentials and API keys
- All activities that occur under your account
- Notifying us immediately of any unauthorized access
We reserve the right to suspend or terminate accounts that violate these Terms.
Third-Party Authentication
If you choose to sign in via Google or GitHub, you authorize us to receive basic account information needed to authenticate you and link your account.
4. Acceptable Use
You agree NOT to:
- Use the service for any illegal purpose or to violate any laws
- Attempt to bypass, disable, or circumvent our security measures
- Engage in abusive, fraudulent, or excessive usage that harms the service or other users
- Reverse engineer, decompile, or disassemble the service
- Use the service to develop a competing product
- Resell or redistribute access to the service without authorization
- Transmit malware, viruses, or harmful code through the service
- Overload or interfere with the service infrastructure
- Use the service for activities that could harm minors
5. API Usage and Rate Limits
Your use of our API is subject to rate limits and quotas based on your subscription plan. Exceeding these limits may result in throttling or additional charges. We reserve the right to modify rate limits with reasonable notice.
6. Fees and Payment
Subscription Plans
Citadel offers various subscription plans with different features and usage limits. Current pricing is available at trymighty.ai/pricing.
Billing
- Subscription fees are billed in advance on a monthly or annual basis
- Usage-based charges are billed monthly in arrears
- A valid payment method on file is required for API usage
- You authorize us to charge your payment method for subscription and usage fees
- All fees are non-refundable unless otherwise stated
- We may change prices with 30 days notice for new billing periods
If a payment fails or is reversed (including chargebacks), we may suspend or terminate access until the balance is settled.
If you cancel, your subscription remains active through the end of the current billing period. Usage during that period is still billable. Any overages will be charged at the end of the cycle via our payment provider.
Taxes
Prices do not include taxes. You are responsible for paying all applicable taxes.
Refunds and Chargebacks
- Subscription and usage fees are generally non-refundable, except as required by law
- We do not provide prorated refunds for partial months or unused usage allowances
- Chargebacks or reversed payments may result in immediate suspension of access
7. Intellectual Property
Our Rights
Citadel, including its software, algorithms, documentation, and branding, is owned by Nine Suns Inc. and protected by intellectual property laws. We grant you a limited, non-exclusive license to use the service during your subscription.
Your Data
You retain all rights to your data. By using our service, you grant us a limited license to process your data as necessary to provide the service. We do not claim ownership of your content.
Feedback
If you provide feedback or suggestions, we may use them without obligation to you.
8. Data and Privacy
Our collection and use of data is governed by our Privacy Policy. By using Citadel, you consent to our data practices as described therein.
9. Communications
We may send you transactional messages related to billing, security, and service operations. We may also send product updates or marketing communications, which you can opt out of at any time.
10. Service Level and Support
We strive to maintain 99.9% uptime for our API but do not guarantee uninterrupted service. Enterprise customers may have specific SLA terms in their agreements. Support is provided via email and our documentation portal.
11. Disclaimer of Warranties
THE SERVICE IS PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT GUARANTEE THAT THE SERVICE WILL DETECT ALL THREATS OR BE ERROR-FREE. WE DO NOT PROVIDE CYBER INSURANCE OR GUARANTEE ANY SPECIFIC SECURITY OUTCOME.
12. Limitation of Liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW:
- We are not liable for indirect, incidental, special, or consequential damages
- Our total liability is limited to the fees you paid in the 12 months preceding the claim
- We are not liable for damages caused by third parties or your misuse of the service
13. Indemnification
You agree to indemnify and hold harmless Nine Suns Inc. and its officers, directors, employees, and agents from any claims, damages, or expenses arising from your use of the service or violation of these Terms.
14. Termination
Either party may terminate this agreement with 30 days written notice. We may suspend or terminate your access immediately if you violate these Terms, engage in abusive activity, or fail to pay amounts due. Upon termination:
- Your access to the service will end
- You may export your data within 30 days
- Outstanding fees become immediately due
15. Open Source Edition
We provide an open source (OSS) version of Citadel under its applicable open source license. The OSS version is self-hosted, provided "as is," and is not covered by our subscription, SLA, or support commitments. You are responsible for your own hosting, security, configuration, and compliance. We do not provide insurance or guarantees for OSS deployments.
16. Changes to Terms
We may modify these Terms at any time. We will notify you of material changes via email or through the service. Continued use after changes constitutes acceptance.
17. Governing Law
These Terms are governed by the laws of Delaware, USA, without regard to conflict of law principles. Any disputes shall be resolved in the courts of Delaware.
18. General Provisions
- Entire Agreement: These Terms constitute the entire agreement between you and us
- Severability: If any provision is unenforceable, the rest remains in effect
- Waiver: Failure to enforce a right does not waive that right
- Assignment: You may not assign these Terms without our consent
19. Contact
For questions about these Terms, please contact us: