I use Proton for email already, but I can see Duck.ai has Claude. Haven’t tried Lumo.
And is there anything as advanced as Copilot yet? Where it remembers who you are and previous conversations? I find that useful so I don’t have to start over in every chat…
I’d suggest using OpenRouter via something like BoltAI. Turn on Zero Data Retention (ZDR) in your account, and you can use frontier models hosted on Azure, AWS, etc. with additional privacy measures (e.g., no training on your data). Plenty of options. Duck.ai is also great, but does something similar to OpenRouter since they give “anonymous” access to models like GPT Luna.
Lumo seems better to me because they host it themselves and proton is trustworthy. Last I check duck.ai was an anonymizing layer but maybe they are using zdr or something now but still I would trust Proton to use private computing more than a big tech.
Couple of others not already mentioned - maple, ppq.ai, and venice. API access for your bot and various levels of privacy and payment options to suit your needs. Hope that helps. Happy hunting.
If you would consider Duck.ai, I recommend choosing either these models; gemma and gpt-oss, both of which passes through Tinfoil’s zero-visibility (through a TEE) so that not even the company can see the prompts and generated outputs.