Grammarly is an AI-powered writing assistant that helps users improve grammar, punctuation, and style in their writing, enhancing clarity and effectiveness in communication.
Grammarly is an AI-powered writing assistant that revolutionizes communication by correcting grammar, punctuation, spelling, and style while leveraging generative AI to compose drafts, rewrite text, adjust tone, generate replies, and brainstorm ideas from simple prompts.[1][2][5] Its core value lies in transforming unclear or inefficient writing into clear, credible, and impactful content that achieves its intended goals, with features like real-time suggestions, tone detection, vocabulary enhancements, readability improvements, email summarization, and personalized style controls that adapt to user preferences and feedback through machine learning.[2][3][4][6]
Ideal for professionals crafting emails and reports, students seeking expert feedback and grade predictions, content creators overcoming blank pages, and teams ensuring on-brand messaging, Grammarly integrates seamlessly across browsers, apps, and devices for instant assistance.[3][5][6] What sets Grammarly apart is its comprehensive AI agents—including Paraphraser, Proofreader, Expert Review, and Reader Reactions—that go beyond basic checks to anticipate reader responses, personalize output to sound like the user, and detect AI-generated content via tools like Authorship, making it the leading generative AI writing partner for every stage from ideation to polish.[2][5][6]
Sources
Superhuman states user content is NOT used for training by default, but users can opt-in via account settings. However,
Superhuman states user content is NOT used for training by default, but users can opt-in via account settings. However,
Moderate risk. Suitable for internal data but avoid confidential information.
Superhuman states user content is NOT used for training by default, but users can opt-in via account settings. However, the Privacy Policy indicates AI training occurs with user content when settings permit, and the opt-in/opt-out mechanism is not clearly explained as default-off across all tiers.
“[Privacy] 'Develop and improve AI. We also use information we collect to train our AI models. You can decide whether Superhuman can use your user content to train our AI models by adjusting the available training control(s) in your account settings.'”
The license grant is broad but limited to service provision purposes. It permits modification and derivative works for service improvement, but does not explicitly state perpetual or sublicensable rights beyond service delivery. The license survives as long as IP laws protect the content.
“[ToS] 'You grant us a worldwide, non-exclusive, royalty-free license to your User Content...for the limited purposes of: (i) Operating, providing, improving, troubleshooting, and debugging our Services...The above license lasts as long as intellectual property laws protect your User Content.'”
Superhuman shares data with trusted service providers under DPAs and restricts AI providers from training on customer content. However, data is shared with marketplace participants, advertising partners (via cookies and unique IDs), and the 'Superhuman family of companies' with limited specificity on controls.
“[Privacy] 'Trusted service providers...are bound by agreements that require them to follow data privacy and security requirements...we restrict our AI service providers from training their models on user content of Superhuman customers.' Also: 'Advertising partners...may use Cookies to collect limited information...we may work with advertising partners to translate your email address or phone number into a unique identifier.'”
Retention periods are vague ('as long as necessary') with different retention for different data types. Deletion on request is mentioned but no specific timeframe is guaranteed. Account deletion is permanent but backup/operational data retention is not clearly addressed.
“[Privacy] 'We retain personal data for as long as necessary to provide our products to you, to complete the transactions you have requested, to comply with our legal obligations, to resolve disputes, and for other legitimate business purposes. We retain the data we collect for different periods of time depending on what it is, how it's used, and how you configure your settings.'”
The ToS explicitly states users own all right, title, and interest in User Content. Superhuman's license is limited to service provision and does not claim ownership or exclusive rights to outputs generated by users.
“[ToS] 'You own all right, title, and interest in and to User Content.' [ToS] 'When you use our generative AI features, your Inputs and the resulting Outputs are your User Content.'”
Superhuman certifies compliance with EU-U.S. Data Privacy Framework and mentions VeraSafe as EEA/UK representative, but no SOC 2, ISO 27001, or HIPAA certifications are explicitly mentioned. Security practices are described but formal certifications are not documented.
“[Privacy] 'For personal data about EEA, Swiss and UK individuals, we comply with the EU-U.S. Data Privacy Framework...we have certified that we adhere to the Frameworks Principles.' No mention of SOC 2 Type II, ISO 27001, or HIPAA in available documents.”
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