Brave Opera
On what the policies say, there's nothing between them. Both are graded B.
Brave
Brave says it doesn't use your Leo AI conversations for model training, keeps the history on your device unless you add it to Sync, and names the setting that clears it.
Verdict
B
- Does not train on you by default
- No opt-out in the policy
- Off by default. Training happens only if you opt in, or not at all.
- 1 Oct 2026
Opera
Opera's AI FAQ says Opera AI does not use what you type in the chat, or the pages you browse, to train AI models, and that OpenAI and Google keep only anonymised fragments, briefly.
Verdict
B
- Does not train on you by default
- No opt-out in the policy
- Off by default. Training happens only if you opt in, or not at all.
- 5 Oct 2026
Brave: every plan
Brave · what each plan can refuse · checked 1 Oct 2026
Brave Browser and Leo AI (free and Premium)
NO
Nothing to switch off
Not stated
Not stated
Unknown
14 / 50
Off by default
0 / 33
Nothing is on, so nothing needs refusing
0 / 4
No paywall on the control
1 / 4
2 kinds of data are in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Brave Browser and Leo AI (free and Premium)TRAINS: NO
- Nothing to switch off
- Not stated
- 19 / 100
- Not stated
- Unknown
Opera: every plan
Opera · what each plan can refuse · checked 5 Oct 2026
All accounts
NO
Nothing to switch off
Not stated
Not stated
Unknown
14 / 50
Off by default
0 / 33
Nothing is on, so nothing needs refusing
0 / 4
No paywall on the control
1 / 4
2 kinds of data are in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
All accountsTRAINS: NO
- Nothing to switch off
- Not stated
- 19 / 100
- Not stated
- Unknown