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Grammarly

A tier

Grammar check + tone + AI drafting, everywhere you type.

Open Grammarly →Compare with alternatives

Kai's verdict

A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.

Strengths

  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions

Weaknesses

  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)

Best for

Non-native English writers, business email, anyone who types a lot.

Pricing

Free + $12-$15/mo Premium + team plans

Alternatives worth knowing

Claude
S
Anthropic's flagship — best reasoning + longest useful context.
Lex
A
Google Docs with an AI collaborator baked in.