Grammarly vs Sudowrite
Side-by-side comparison of Grammarly and Sudowrite.
AI writing assistant for grammar, tone, and clarity
AI writing tool built specifically for fiction authors
What they are
Grammarly
Grammarly is the most widely adopted AI writing assistant, with over 40 million daily users, offering real-time grammar, spelling, clarity, and tone suggestions across browsers, Word, Google Docs, email, and more. It polishes writing without copy-pasting. Its paraphrasing and generation features are secondary to its core grammar and clarity strengths.
Sudowrite
Sudowrite is an AI writing assistant designed for novelists, short story writers, and screenwriters who need help developing plot, prose, and characters. It offers specialized tools like Story Engine for structured novel drafting, Describe for sensory scene details, and Brainstorm for unstuck moments. Unlike general-purpose AI writers, it is tuned for creative fiction rather than marketing copy. The tradeoff is that it is narrowly focused, so non-fiction and content creators will find limited utility here.
if you need ai writing. Starts at 12/mo.
if you need ai writing. Starts at 10/mo.
- +Purpose-built for fiction, not a general-purpose tool retrofitted for it
- +Story Engine guides writers through structured novel development chapter by chapter
- +Describe and Sensory tools generate vivid, specific scene details quickly
Which to choose
Grammarly and Sudowrite both cover ai writing, so this is a real either-or for some teams. The right pick depends on which one's wider feature set and pricing fit how you work.
Read the full reviews for Grammarly and Sudowrite.
Pricing checked 5 Jun 2026.