terms of use (ToS)

in English: terms of service (terms of use)

basicwidespread

Terms of use are the contract you accept by using an online service: it records what you can do, what you cannot, and what the provider undertakes.

In plain terms

Terms of use are like a swimming pool's house rules, but not just a list of regulations: they are a real contract between you and the provider. When you register for an AI chatbot and check "I agree," you are entering into this contract, even if you did not read a single line of it.

For AI services, this text decides the most important practical questions. Who owns the text or image the system creates for you? Can your entered data be used to train the model? What is the tool forbidden to be used for, and who is liable if the answer is incorrect?

It differs from a custom contract in that you cannot negotiate it: you either accept it as is or do not use the service. In return, the law, especially in the EU, protects consumers against unfair terms.

How it works

The provider writes the terms and publishes them on its website, typically alongside the data processing notice and acceptable use policies.
Upon registration, you accept them via a checkbox or button. From that point, the text becomes binding for both you and the provider.
Terms and conditions set out rights and prohibitions: how you may use the service, who owns the input and output content, what the provider may do with your data, and the scope of its liability.
If you break the rules, the provider may restrict or terminate your account. If they break them, you can file a complaint or take legal action.
The provider modifies the text from time to time. You usually receive a notification about this, and if you continue using the service, you typically accept the new version as well. In the EU, consumers generally have the right to terminate in case of significant, detrimental changes.

An everyday example

Upload one of your company's contracts to a free AI chatbot to get a summary. The terms of use reveal whether the provider can use the entered text to improve the model and whether you can disable this in the settings.

Who is affected

everyoneAnyone using any AI application has accepted its terms and thereby decided what may happen to their data.

entrepreneur, executiveThe terms determine whether AI-generated content is usable for business purposes and whether corporate data remains confidential.

developerIf you build a product on a model or API or allow an agent on other websites, the terms define what is allowed and what is not. → Code

parent, student, teacherMost AI services set a minimum age requirement and may require parental consent for minors. → Education & Family

A common misconception

MythIf I haven't read it, it doesn't apply to me.

In realityBy clicking the accept button, the terms are binding even if you have not read them, provided you could have accessed them. Unusual or significantly different clauses must be specifically brought to your attention. Unfair clauses are not binding on the consumer, regardless of what you checked.

Limits and risks

The terms are long and written in legal language, so it is worth at least skimming the sections on data usage, content ownership, and prohibited use.
Free, subscription, and enterprise plans often have different rules, especially regarding whether your data is used for training.
The text can change, so what was true for a service last year may not be true today.
Terms cannot override the mandatory rules of the law: such data protection, consumer protection, and copyright rules apply even if the text says otherwise.

Similar, but not the same

data processing notice – The data processing notice is not a contract but information on what personal data the provider collects and what it does with them. By contrast, the terms of use regulate the entire legal relationship.
acceptable use policy – This is a section or appendix of the terms that specifically lists prohibited use cases.
szoftverlicenc – A license is a copyright permission to use, copy, modify, or distribute a program or model. Terms of service govern the use of a running service, though they often include a license as well.

Related concepts

Broader

contract, consumer protection, AI regulation

Narrower

acceptable use policy, API terms, community guidelines

On the edge

data processing notice, szoftverlicenc, copyright, GDPR, web scraping

A brief history

Pre-written, non-negotiable contract terms have long been used, for example, by insurers, banks, and transport companies. They moved to the internet from boxed software licenses, where click-through acceptance became common. In 1993, the EU stated in a directive that unfair contract terms vis-à-vis consumers are not binding. The Digital Services Act (DSA), adopted in 2022 and fully applicable from February 2024, requires clear and understandable terms from online intermediary service providers, including platforms.

Where things stand

By the end of 2026, virtually every AI service has terms of use. The debates mainly concern whether models can be trained on user data, who owns the generated content, and whether agents can enter into agreements with other sites on behalf of users.

Status: 2026 November

In the news

Appears in 5 Agent Age stories; the curve shows weekly occurrence in the news magazine.

Toshiba HR chief says entry-level workers should use AI more, not lessOct 27, 2026 · Work & HR
Hungarian 'Felkészítő AI' service helps with grade 8 entrance exams and intermediate-level school-leaving examsOct 26, 2026 · Education & Family
Italian competition authority opens investigation into Suno's terms of serviceOct 6, 2026 · Jog
Shopify CEO says AI-proof-of-need rule led staff to throw "slop grenades" at each otherSep 21, 2026 · Work & HR
OpenAI ends model access for Cursor after SpaceX acquisitionAug 26, 2026 · Agent Age

Also known as

terms of use · terms of service · general terms and conditions · T&C · terms of service · terms of use · ToS · terms and conditions

Sources

Wikipedia: Terms of service

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