Grammarly QuillBot
On what the policies say, there's nothing between them. Both are graded D.
Grammarly
Grammarly trains AI models on your content by default, with a control in account settings. The policy is now published by Superhuman Platform Inc., formerly Grammarly.
Verdict
D
- Trains on you by default
- A self-serve opt-out exists
- On by default. An opt-out exists, but you have to go looking for it.
- 5 Oct 2026
QuillBot
QuillBot trains on what you type unless you act: extension users get two switches, website users must email privacy@quillbot.com, and only Team Plan users are excluded by default.
Verdict
D
- Trains on you by default
- The opt-out is sold with a higher plan
- On by default. An opt-out exists, but you have to go looking for it.
- 5 Oct 2026
Grammarly: every plan
Grammarly · what each plan can refuse · checked 5 Oct 2026
Free & Premium (individual accounts)
YES
Self-serve toggle
Not stated
Not stated
Unknown
32 / 50
On by default, with a way out
15 / 33
One switch, but the policy never says which way it ships
0 / 4
No paywall on the control
0 / 4
One kind of data is in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Free & Premium (individual accounts)TRAINS: YES
- Self-serve toggle
- Not stated
- 51 / 100
- Not stated
- Unknown
QuillBot: every plan
QuillBot · what each plan can refuse · checked 5 Oct 2026
The right to refuse starts here
Website tools (free and individual Premium)
YES
Contact support
Not stated
Qualified
Unknown
32 / 50
On by default, with a way out
18 / 33
Refusing means writing to the company
4 / 4
The control exists but only on a paid plan
1 / 4
2 kinds of data are in scope
2 / 4
The policy does not say whether people read it
1 / 2
De-identification is promised with a qualifier
Browser extension 4.37.0 or later (account-holders)
YES
Self-serve toggle
Not stated
Qualified
Unknown
32 / 50
On by default, with a way out
15 / 33
One switch, but the policy never says which way it ships
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
1 / 2
De-identification is promised with a qualifier
Team Plan (paid)
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
The right to refuse starts here
Website tools (free and individual Premium)TRAINS: YES
- Contact support
- Not stated
- 58 / 100
- Qualified
- Unknown
Browser extension 4.37.0 or later (account-holders)TRAINS: YES
- Self-serve toggle
- Not stated
- 51 / 100
- Qualified
- Unknown
Team Plan (paid)TRAINS: NO
- Nothing to switch off
- Not stated
- 19 / 100
- Not stated
- Unknown