Grammarly

Grammarly wins on a dimension none of the AI-first tools compete on: it is already wherever you type. Email, Word, Google Docs, Slack, LinkedIn, the CMS — the suggestions appear in place, with no copying into a separate window. For an organisation that wants every employee writing more clearly, that ubiquity delivers more real-world improvement than a better model behind a login would.

The core editing is excellent and has been for years: grammar, clarity, tone detection and concision suggestions that make ordinary business writing noticeably better. Tone detection in particular catches the email that reads as blunter than intended, which is a genuinely useful thing for a machine to notice. Business at $15 per seat with style guides and brand tones is well priced for what it does.

The generative side is the weaker half. It writes and rewrites competently but a general assistant does it better, and reviewers who expected Grammarly to replace ChatGPT are the disappointed group. There are also long-standing concerns about a tool with access to everything you type, which security teams should evaluate on the enterprise tier rather than assume.

Our guidance: buy Grammarly to raise the floor on writing across a whole company, not to generate content. It complements a general assistant rather than competing with one, and most of our reviewers pay for both.