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Writing assistants compared

A summary of what each vendor's own public documents say on the headline questions. Click a vendor for more.

QuestionGrammarlyJasperWriter
AI training on identifiable customer content: defaultYes, subject to the training control in account settings
Quote“text | text”
Yes under the Terms of Service (Creator and Pro); No under the EULA and SaaS Agreement
Quote“Jasper uses Customer Property, including Input and Output, to provide, maintain, and improve the Services, including for the purpose of developing and enhancing Jasper’s artificial intelligence models. | Notwithstanding anything else in this Agreement to the contrary, Jasper shall not use, nor permit a third party to use, Customer Property to train artificial intelligence models utilized by the Service.”
No
Quote“Our Use of Materials. We may use your Materials to provide, maintain, and improve the Services, to develop other products and services, to comply with applicable law, and to enforce our terms and policies. We will not use your Materials to train our models. ”
Product-improvement use of contentYes
Quote“For troubleshooting and product improvement, we typically retain user content for no longer than one year, after which we either delete or de-identify the content”
Yes
Quote“Processor shall have a right to Process Personal Data in relation to the support and/or use of the Services for its legitimate business purposes, such as billing, account management, technical support, product development”
Yes
Quote“We may use your Materials to provide, maintain, and improve the Services, to develop other products and services, to comply with applicable law, and to enforce our terms and policies.”
Terms change noticeDays stated
Quote“If we make changes, we will notify you either by email or through the Services at least thirty (30) days before the changes take effect.”
Not statedNot stated
AI statusAI features
Quote“Depending on your Subscription Plan, you may be able to use generative AI features within our Services that allow you to input prompts and other text (“ Inputs ”) and receive AI-generated outputs”
—AI-native
Quote“Writer is an artificial intelligence platform for agentic work”

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How we read documents ?We review the vendor's own public documents, like their terms of service, privacy policy, data processing agreement, and trust pages. Some answers come from a vendor's help or website pages, which are not contract terms, so each source is labelled with the kind of document it is. Every answer below carries a short quote or excerpt, a link to the source, and the date we captured it.

All descriptions are for informational purposes only. Nothing here is a legal interpretation or legal advice.

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