AI privacy depends on where prompts run, what gets stored, and who processes them. This expanded list updates our earlier six-platform comparison. Rankings are editorial, not a security audit.

1. Ollama (local models)

Local inference keeps prompts on your computer. Optional cloud models change that privacy boundary.

2. Proton Lumo

No conversation logs or training; saved history is zero-access encrypted. Prompts still reach Proton’s servers.

https://www.youtube.com/watch?v=-1dESaM694U

3. Duck.ai

Anonymized prompts and provider no-training agreements, with model-specific caching and legal exceptions.

https://www.reddit.com/r/privacy/comments/1tz5s5e/best_ai_provider_for_privacy/

4. Brave Leo

No login or training; local chat history and privacy-focused browser integration. Model hosting can vary.

5. Apple Intelligence

On-device processing plus Private Cloud Compute, which Apple says does not retain request content.

6. Claude

Consumer training opt-out is available; safety-review exceptions and cloud retention still matter.

7. ChatGPT

Training controls and Temporary Chat reduce exposure; temporary conversations may be retained for 30 days.

https://www.reddit.com/r/lumo/comments/1rm7e25/hows_lumo_long_term_compared_to_gpt_gemini/

8. Venice AI

Private mode promises zero retention; paid E2EE runs in verified enclaves. Anonymous frontier models may retain prompts.

https://www.youtube.com/watch?v=fgjFiH6EzDs

Venice is #8 by requested placement, not because its E2EE is weaker. Related coverage: AI agent permissions and email alias privacy.

Editor’s Note: Confirm each product’s selected model and privacy mode. Cover art is an original illustration.

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