Grammarly vs Microsoft Copilot

Free: $0/month and 100 generative-AI prompts per month. Pro: displayed at $12 USD and includes 2,000 AI prompts per member per month, unlimited personalized suggestions, full-sentence rewrites, tone controls, plagiarism checking, and AI-generated-text detection. Enterprise: contact sales and includes unlimited prompts per member per month plus enterprise controls. The extracted pricing page did not unambiguously expose the billing cadence attached to the displayed $12 Pro amount.

Official sources confirm AI drafting, rewriting, tone adjustment, fluency suggestions, grammar assistance, plagiarism checking, and AI-text detection. For Free, Premium, and single-user Pro accounts, Product Improvement and Training is enabled by default, but users can opt out; when disabled, user content is not used for model training, validation, or product improvement. Multi-user accounts bought directly online are also enabled by default, with an administrator opt-out. Enterprise-tier, sales-purchased Pro/Business, and Education accounts have training disabled by default. Grammarly says its external LLM service providers may receive prompts and context to provide generative features but may not train their models on user content. Under the October 29, 2025 Superhuman terms, inputs and outputs are User Content, and users own all right, title, and interest in User Content; the terms also grant Superhuman a broad license for operating, improving, customizing, and developing its services.

Microsoft 365 Copilot Chat is available for work or education without an additional Copilot license and supports metered pay-as-you-go agents. Microsoft 365 Copilot Business is displayed at a promotional $18/user/month, paid yearly, versus a $21 list price. Microsoft 365 Business Standard with Copilot is $23.50/user/month paid yearly, and Business Premium with Copilot is $32/user/month paid yearly. Prices are USD, annual subscriptions that auto-renew, and may vary by market.

This verification is scoped to Microsoft 365 Copilot for business, not every consumer or product-specific service branded Copilot. Microsoft 365 Copilot works in Word, Excel, PowerPoint, Outlook, Teams, Loop, and other Microsoft 365 surfaces; it uses Microsoft Graph data the user is permitted to access and includes Copilot Chat, Copilot Search, agents, and app-specific drafting, summarization, analysis, and meeting capabilities. Prompts, responses, and Microsoft Graph data are not used to train foundation LLMs. Interaction content is stored under the customer's Microsoft 365 contractual commitments, encrypted at rest, manageable through Microsoft Purview, and deletable through Copilot activity history controls. Microsoft does not claim ownership of service output but does not determine whether output is copyright-protected or enforceable. Its Copilot Copyright Commitment can defend qualifying commercial customers against certain copyright claims when required guardrails and content filters were used. The official privacy and overview documentation was updated July 9, 2026.