What Lucas does with your messages
Read from its published policy on 2026-09-06, and quoted rather than paraphrased. It says it does not train on your conversations. It does not say which company actually carries your messages, which puts it with the majority: only 9 of 41 do.
What the document says
| Trains on your conversations | States it does not |
|---|---|
| Data of people who never signed up | Addressed |
| If you cancel | Not addressed |
| Model providers named | OpenAI, Anthropic, Google |
| Who carries the messages | Not disclosed |
| Where to report a hole | Published |
| Jurisdiction | Not stated |
In its own words
“We do not use your messages or other User Content to train AI or machine learning models.”
“Other people may provide information about you when they message Lucas, include you in a task, invite you to a meeting, send you an email, share a document, or ask Lucas to contact you.”
What it does not answer
The policy is silent on if you cancel, who carries the messages and jurisdiction. Silence is not a denial, and it is not a promise either: a document that does not address the people in your group thread has not agreed to anything about them.
Back to the Lucas listing, or see every policy in this directory read the same way, where 9 of 41 name who holds your messages and the rest do not.