
Side-by-side comparison based on pricing, features, and community data.
Grammarly and Sudowrite are both AI writing tools. Grammarly is Freemium; Sudowrite is Paid. Grammarly and Sudowrite serve fundamentally different writers.
Grammarly and Sudowrite serve fundamentally different writers. Pick Grammarly if you write professional emails, documents, and social content across platforms—it's a proofreader and clarity coach everywhere you write, with a free tier to start. Pick Sudowrite if you're serious about fiction, screenplays, or novels and need GPT-4 to generate plot, dialogue, and scenes while maintaining character voice. Grammarly fixes what you've written; Sudowrite accelerates what you're creating. Grammarly's $12/month premium is an edit tool for professionals and students. Sudowrite's $20/month targets authors who treat writing as a craft requiring specialized AI. They don't compete—they solve opposite problems.
Pick Grammarly if you write across email, LinkedIn, documents, and social media and want real-time grammar, clarity, and tone feedback everywhere.
Pick Sudowrite if you're writing fiction, screenplays, or novels and need AI to generate scenes, dialogue, and plot while managing character consistency.
| Feature | Grammarly | Sudowrite |
|---|---|---|
| Core strength | Grammar, clarity, tone fixing | Story generation & expansion |
| Target writer type | Professionals, students, general writers | Fiction authors, screenwriters |
| Plagiarism detection | ✓ Premium only | — |
| Character/plot tracking | — | ✓ Story Bible |
| Platform coverage | 500+ web apps, mobile, desktop | Web only |
| Free tier | ✓ Basic features | — |
| Screenplay formatting | — | ✓ Industry standard |
| Pricing | $12/month (premium) | $20/month (required) |
Synthesized by AI from verified tool data · cached per pair

Basic grammar and spell checking
All features including plagiarism detection, tone detection, advanced suggestions
Team collaboration, brand style guides, team analytics
Unlimited writing, AI generations, full feature access