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Fastmail vs Tuta

On what the policies say, Tuta is the better choice for your data: graded A against Fastmail's B.

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.

Fastmail

Fastmail's privacy policy now says it in one sentence: it does not and has never trained AI on customer data. It was added on 2 September 2026, a week after Fastmail told us so by email.

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: 5 Oct 2026

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Tuta

Tuta's privacy statement says the operating company has no access to the unencrypted data at all — a statement about what is reachable, not a promise about what it chooses to do.

Verdict

By default: Does not train on you by default
The way out: Cannot train on you: the content is not readable to them
What A means: Cannot train on you. Your content is not available to the company in usable form.
Last checked: 5 Oct 2026

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Fastmail: every plan

Fastmail · what each plan can refuse · checked 5 Oct 2026

1 PLAN

Plan

Exposure

Trains

Opt-out path

Retention

De-identified

Human review

All plans

18 / 100

Nothing to switch off

Not stated

Unknown

How the score is made18 / 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

Scope0 / 4

One kind of data is 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

All plansTRAINS: NO

OPT-OUT: Nothing to switch off
RETENTION: Not stated
EXPOSURE: 18 / 100
DE-IDENTIFIED: Not stated
HUMAN REVIEW: Unknown

Tuta: every plan

Tuta · what each plan can refuse · checked 5 Oct 2026

1 PLAN

Plan

Exposure

Trains

Opt-out path

Retention

De-identified

Human review

All plans

5 / 100

CANNOT

Nothing to opt out of

Not stated

How the score is made5 / 100 · the rubric

Default3 / 50

The company states it cannot reach your content

Way out0 / 33

Nothing is on, so nothing needs refusing

Paywall0 / 4

No paywall on the control

Scope0 / 4

One kind of data is in scope

Human review0 / 4

The policy says people do not 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

All plansTRAINS: CANNOT

OPT-OUT: Nothing to opt out of
RETENTION: Not stated
EXPOSURE: 5 / 100
DE-IDENTIFIED: Not stated
HUMAN REVIEW: No

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