opt-out

basicwidespread

Opt-out means something applies to you by default, and you must specifically indicate if you want to opt out.

In plain terms

Opt-out is like a 'No Junk Mail' sticker on your mailbox. Until you put it up, the flyer arrives, and you must take action if you do not want it.

In the AI world, this most often means that a company can use your conversations, images, or writings by default to train its model unless you disable it. The same logic applies to authors and publishers: they can signal that their website content should not be collected for AI training.

The opposite is opt-in, where nothing happens until you explicitly say yes. The difference is significant because most people never touch the settings, so the default determines what happens to your data.

How it works

The provider sets a default, for example, that your conversations can be used to improve the model.
It informs you of this in the privacy notice, in a pop-up window or by email, and gives you a way to opt out: a switch, a form or an email/postal address.
If you indicate that you do not consent, the company must generally not use your data for that purpose from that point on. This usually does not apply retroactively to data already used.
Website owners can also signal this in machine-readable form: in a robots.txt file or another machine-readable notice, they can state that AI companies' crawlers and agents should not download the content.
This signal is a request, not a technical lock: compliance is ensured by law and the company's voluntary commitment, making verification difficult.

An everyday example

You open the settings of your favorite chatbot and find a switch turned on: 'Help develop the model with your conversations'. If you turn it off, you have exercised the opt-out option. If you had not found it, your conversations could have become training data by default.

Who is affected

everyoneIf you use a chatbot, a social media site, or an AI-enabled application, your data may be used by default unless you opt out.

employeeIf you paste a corporate document into an AI tool, it matters whether it becomes training data. → Work & HR

entrepreneur, executiveYou must decide whether to exclude your company's website and customer data from AI training and what default settings to apply in your own service.

lawyer, citizenIn the EU, the right to object and the right to reserve copyright provide the legal basis for opt-out; these can be cited. → Law

A common misconception

MythOnce I have disabled it, my data disappears from the model.

In realityOpt-out typically applies only to the future. What the model has already learned is very difficult or impossible to remove afterward.

Limits and risks

The switch is often hidden deep in settings and must be found separately for each service and even each account.
Terms may change, so after a major update or new notice, it is worth rechecking your settings.
Not every crawler respects the machine-readable blocking instructions placed on websites, and this is hard to check from the outside.
An opt-out applies only to the purpose it states: disabling training does not mean the company does not store your data at all.

Similar, but not the same

opt-in – With opt-in, your data is not used for a specific purpose until you explicitly agree; with opt-out, you must object.
right to erasure – Deletion means removing your stored data, while opt-out stops further use.
unsubscribe – Unsubscribing is a common case of opt-out, typically applying to newsletters and notifications.

Related concepts

Broader

data protection, default setting

Narrower

training opt-out, Copyright reservation, unsubscribe

On the edge

opt-in, consent, GDPR, training data, text and data mining, robots.txt

A brief history

The machine-readable opt-out signal for websites, robots.txt, was created in 1994, originally for search engines, and became an official internet standard (RFC 9309) in 2022. The EU's 2019 Copyright Directive allowed text and data mining, but in a way that allowed rights holders to explicitly reserve their rights in a machine-readable format for online content. This became the legal basis for opt-out disputes around AI training. The EU's 2024 AI Regulation (AI Act) now obliges providers of general-purpose AI models to recognize and comply with these reservations.

Where things stand

As of late 2026, most major AI services offer some way to opt out of training, and websites are blocking AI data collectors en masse. However, there is still no single technical standard that everyone follows, and it remains a matter of debate whether the rule should be opt-out or opt-in.

Status: 2026 November

In the news

Appears in 16 Agent Age stories; the curve shows weekly occurrence in the news magazine.

New standard proposal would simplify how publishers opt out of AI trainingNov 4, 2026 · Marketing
Google turns off AI by default on K-12 student accounts; schools that opt out may lose SearchNov 2, 2026 · Education & Family
Google cases could test EU AI training rules and rights reservationOct 29, 2026 · Jog
Oklahoma law requires district AI policies, parental opt-out rights and annual disclosures by 2027–28Oct 19, 2026 · Education & Family
Google's Gemini copyright case returns to EU top court calendar as third referralOct 12, 2026 · Jog
EU regulators ask publishers about Google's AI opt-out policySep 14, 2026 · Marketing
Google extends opt-out from AI search to sites worldwide as EU examines uptakeSep 7, 2026 · Marketing
Parent drops lawsuit over AI use on English essay; University of Toronto lets students opt out of detection toolSep 4, 2026 · Education & Family

Also known as

opt-out · opt out · omission · unsubscribe · right to object · rights reservation · TDM opt-out

This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.