Microsoft Copilot is built for microsoft 365 users and enterprise, with a focus on chat and web-search. Grammarly targets writers and students and leads with grammar and spelling.

On pricing, Grammarly is the clear winner for budget-conscious users — starting at $12/mo compared to $20/mo for Microsoft Copilot. That $8/mo difference adds up quickly for growing teams.

Both offer free plans, so you can test each with your real workflow before committing to a subscription.

Feature-wise, Microsoft Copilot offers broader built-in capabilities (7 features vs 6), while Grammarly takes a more focused approach — which can mean a simpler, faster onboarding experience.

Both tools are a solid fit for students — in those cases, the decision often comes down to workflow style and how your team prefers to organize work.

Bottom line: Grammarly has a slight overall edge — but if free access to gpt-4 via bing integration matters most to you, Microsoft Copilot may still be the right call.