· privacy-tools

Brave vs Vivaldi

Brave's policy answers the question and is graded B. Vivaldi's doesn't say either way. That's a finding about the document, not a worse grade.

Grades read the plan most people are on. Each company's full entry has every plan, every clause and the archived copy it was read from.

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

By default: Does not train on you by default
The way out: No opt-out in the policy
What B means: Off by default. Training happens only if you opt in, or not at all.
Last checked: 1 Oct 2026

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Vivaldi

Vivaldi's browser privacy policy is short and direct, and it does not mention AI, machine learning or model training at all.

Verdict

By default: The policy does not say
The way out: Nothing to opt out of on the record
Last checked: 30 Aug 2026

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Brave: every plan

Brave · what each plan can refuse · checked 1 Oct 2026

1 PLAN

Plan

Exposure

Trains

Opt-out path

Retention

De-identified

Human review

Brave Browser and Leo AI (free and Premium)

19 / 100

Nothing to switch off

Not stated

Unknown

How the score is made19 / 100 · the rubric

Default14 / 50

Off by default

Way out0 / 33

Nothing is on, so nothing needs refusing

Paywall0 / 4

No paywall on the control

Scope1 / 4

2 kinds of data are in scope

Human review2 / 4

The policy does not say whether people read it

De-identified2 / 2

Nothing is said about de-identification

EVERY CELL ABOVE IS SOURCED FROM A QUOTED CLAUSE OR A DOCUMENTED SEARCH · SEE THE EVIDENCE ABOVE

EXPOSURE IS SCORED 0–100 ON ONE AXIS, HOW HARD IT IS TO STOP THIS PLAN TRAINING ON YOU. THE GRADE IS THE BAND IT FALLS IN: A 0–10 · B 11–25 · C 26–45 · D 46–60 · E 61–80 · F 81–100. HOW THE SCORE IS SET

Brave Browser and Leo AI (free and Premium)TRAINS: NO

OPT-OUT: Nothing to switch off
RETENTION: Not stated
EXPOSURE: 19 / 100
DE-IDENTIFIED: Not stated
HUMAN REVIEW: Unknown

Vivaldi: every plan

Vivaldi · what each plan can refuse · checked 30 Aug 2026

1 PLAN

Plan

Exposure

Trains

Opt-out path

Retention

De-identified

Human review

All accounts

UNCLEAR

Not established, see below

Not stated

—

Not established

EVERY CELL ABOVE IS SOURCED FROM A QUOTED CLAUSE OR A DOCUMENTED SEARCH · SEE THE EVIDENCE ABOVE

All accountsUNCLEAR

OPT-OUT: Not established
RETENTION: Not stated
EXPOSURE: —
DE-IDENTIFIED: —
HUMAN REVIEW: Not established

Every grade on this page is the one on the company's own entry, read from a dated, archived copy of its policy. Nothing here is computed separately. How grades are set · All comparisons