4.1 To operate the platform: creating your account, processing your generations, managing your subscription and credits.

4.2 To process payments via Stripe. We pass your email and subscription details to Stripe for payment processing. We never store your full card details.

4.3 To send you essential service emails: receipts, subscription confirmations, credit alerts, security notices. You cannot opt out of these as they are necessary for the service.

4.4 To send you marketing communications: product updates, new features, blog posts. Only with your consent. You can unsubscribe at any time via the link in every email.

4.5 To improve the platform. We analyse aggregated, anonymised usage patterns (which models are popular, average generation times, error rates) to improve the service. This analysis uses only aggregate statistics. Your individual prompts, uploads, and outputs are not used for this purpose.

4.6 To prevent abuse. We monitor for violations of our Acceptable Use policy and may review flagged content.

5.1 Images, audio, video, and other files you upload, and prompts you submit, are processed solely to fulfil your generation requests. They are transmitted to the relevant third-party AI model provider for processing and then returned to us.

5.2 We do not use your uploads, prompts, or generated outputs to train AI models.

5.3 Generated outputs (images, videos, audio, 3D models) are stored on our own infrastructure (Supabase storage). When a provider returns a generated file, we download it to our storage. The provider's temporary copy typically expires within hours to days depending on the provider.

5.4 You can delete generated content at any time from your dashboard. When you delete content, it is removed from our storage within 30 days to allow for backup cycle completion. Orphaned temporary files are automatically cleaned up by a scheduled maintenance process.

5.5 Third-party AI model providers process your inputs on their own infrastructure in order to generate outputs. Our access to those providers is governed by B2B agreements between Archademia Ltd and each provider. Under those agreements, certain providers may retain or use your inputs and outputs for their own purposes, including model training and improvement. This is separate from our own commitment in 5.2 above. It reflects what happens on the provider's infrastructure, which we do not control. Specifically:

• fal.ai retains generated media on their CDN for a limited period (typically 7 days) before deletion.
• Runway reserves the right to use inputs and outputs for model training on non-Enterprise API plans.
• Kling (Kuaishou) retains a permanent, royalty-free licence to use content for AI training and promotional purposes.
• ElevenLabs retains a perpetual licence to create derivatives from voice data for model improvement.

We select providers with strong data handling practices and maintain a reference page at stensyl.ai/providers linking to their privacy policies and terms of service.

5.6 Generated output URLs. Your generated files are stored in our storage using unique, non-guessable file paths. Files are accessible via direct URL without additional authentication, which enables features such as sharing and embedding. However, file paths cannot be listed or enumerated by other users. Access requires knowing the exact URL.

Essential cookies: Required for the platform to function, including authentication and session management. These cannot be disabled.

Analytics cookies: Help us understand how the platform is used. You can opt out of these via the cookie banner on first visit.

We do not use advertising or tracking cookies.

Right of access: Request a copy of all personal data we hold about you.

Right to rectification: Request correction of inaccurate data.

Right to erasure: Request deletion of your personal data ("right to be forgotten"). Note: we may retain certain data where required by law (e.g., financial records for HMRC).

Right to restrict processing: Request that we limit how we use your data.

Right to data portability: Request your data in a structured, machine-readable format.

Right to object: Object to processing based on legitimate interests or for direct marketing.

Right to withdraw consent: Where processing is based on consent, you can withdraw it at any time.

12.1 Data Transmitted. When you use Seedance 2.0, the following data is sent to fal.ai and ByteDance for processing:

• Your text prompt
• Any reference files (images, audio, video clips) you include
• A unique end user identifier linked to your Stensyl account
• Generation parameters (resolution, duration, aspect ratio, audio settings)

12.2 Data We Log. In addition to the data transmitted, Stensyl logs: timestamps, generation status, error categories, and the fal.ai request ID for each Seedance 2.0 generation.

12.3 Processing Chain.

• Stensyl (United Kingdom): data controller
• fal.ai (United States): data processor, routing generation requests
• ByteDance (China): sub-processor, running the Seedance 2.0 model

This chain is specific to Seedance 2.0. Other models on Stensyl involve different processors (see Section 6).

12.4 Purpose. Prompts, references, and parameters are processed solely to generate the video content you requested. The end user identifier is required by our distribution agreement for user identification and compliance. Generation logs are maintained to comply with identification and restriction requests if required by ByteDance or fal.ai.

12.5 Retention. Generated video URLs expire within 24 hours on ByteDance's infrastructure. Seedance 2.0 generation logs are retained by Stensyl for a minimum of 12 months.

12.6 Your Choice. You are not required to use Seedance 2.0. All other video, image, 3D, audio, and writing models on Stensyl remain available without the data processing described in this section. If you do not wish your data to be processed by ByteDance, simply choose a different video model.