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Free shows today's risk. A Stack Audit gives you a citable, verbatim-sourced PDF across your whole AI stack — and flags the moment a vendor's terms change.
Your privacy
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158 verified findings across the displayed surfaces.
81 verified findings across the displayed surfaces.
Empty Comparison Slot
Synthesia has moderate defaults; Replit AI carries the most permissive license terms of the set.FOR ENTERPRISE: REPLIT AI NOT RECOMMENDED · SYNTHESIA ENTERPRISE TIER ACCEPTABLE
| RISK SURFACE | REPLIT AI | SYNTHESIA |
|---|---|---|
| PPrompt Ownership | ||
| OOutput Ownership | ||
| TModel Training | ||
| CCommercial Use | ||
| DData Privacy | ||
| $Tier Differences |
“ 1. Your Content and Ownership ”
“ This Privacy Policy governs and explains how we collect and process your personal information when you (“ you ” or “ User ”) use our website, located at synthesia.io (“ Site ”), services and products accessible through the Site (“ Services ”), and the associated web-based softwa…”
“Content you publish as a public App is automatically made subject to the MIT License , which allows others to view, copy, modify, and distribute your code, on or off platform. Other users may “fork” your public Apps, which will provide them a copy of your App that they control. I…”
Publishing a public App automatically applies the MIT License to user code, which is an irrevocable permissive license allowing any third party to use, modify, and distribute the code commercially. Users may not be aware of this automatic licensing.
“Content published in public Apps may be used by Replit for improving the Service, including but not limited to developing or training large language models, both during and after the term of this agreement.”
Public App content can be used to train LLMs indefinitely, including after a user terminates their account. No opt-out mechanism is mentioned.
“Fine-tuning the AI model to enable it to generate new videos with your Avatar based on the Sample performing a user-provided input;”
User's biometric data (Sample) is explicitly used to fine-tune Synthesia's AI models, meaning the user's likeness directly contributes to model training.
“ Content on the Service originates from various sources and is made accessible for your use on the Service only. You acknowledge that your access and use of this content is at your own risk. You are not authorized to use such content outside of the Service, nor to download third…”
“ In addition to our third-party vendors acting on our behalf, we will only disclose, redisclose or otherwise disseminate Biometric Data in the following circumstances: As instructed by the Customer as a data controller; As required by applicable State or federal law or municip…”
“Upon account deletion, we will delete your stored data in accordance with our data retention policy and applicable law.”
Deletion is deferred to an unspecified 'data retention policy' not included in these terms. Users cannot assess actual retention timelines from this document alone.
“Avatar creation features require processing of the facial geometry and/or voiceprint from each of the Sample and Verification Recording. Certain steps in creating an Avatar involve the processing of data considered “ biometric data ”, “ biometric information ”, “ biometric identi…”
Synthesia collects and processes highly sensitive biometric data (facial geometry, voiceprints) which is subject to stringent regulation in multiple jurisdictions. Users should be aware of the elevated risk associated with providing such data.
“If you prefer to not have others see your code, you can upgrade to make that code private. If you import code from GitHub and your repository is public, it will remain public by default on Replit. If you wish to import code from GitHub and your repository is private, you can upgr…”
Free-tier users have their code public by default, exposing potentially proprietary or sensitive code to all users. Privacy is a paid feature, creating a significant risk for free-tier users unaware of this default.