QuillBot vs Sudowrite
QuillBot and Sudowrite are two of the most-compared Writing tools. QuillBot starts at $8/mo and Sudowrite at $19/mo — and they differ in features, ratings, and the use cases they suit best. This side-by-side breakdown covers pricing, key features, the pros and cons of each, and a clear verdict to help you pick the right one.
Pros & cons
Pros
- ✓Generous free plan to get started
- ✓Unlimited paraphrasing with 9 modes on Premium
- ✓Built-in AI detector plus humanizer
- ✓Plagiarism checker (25,000 words/month)
- ✓Chrome, Word and macOS integrations
- ✓Affordable at $8.33/month billed annually
Cons
- ✗Free paraphraser capped at 125 words
- ✗AI detector accuracy varies — do not rely on it alone
- ✗Best features locked behind Premium
- ✗No public API
Pros
- ✓Muse 1.5 model fine-tuned on published fiction
- ✓Story Engine for guided novel development
- ✓Story Bible keeps long manuscripts consistent
- ✓Competitive annual pricing (from $10/mo)
- ✓Free trial — no credit card required
Cons
- ✗No PDF, EPUB, or DOCX export
- ✗Not suitable for non-fiction or marketing copy
- ✗Credit system can confuse beginners
- ✗No mobile app (web only)
The verdict
QuillBot and Sudowrite are close competitors, but a few differences stand out. QuillBot is the more affordable option at $8/mo — about 58% less than Sudowrite at $19/mo. Sudowrite earns the higher user rating (4.5 vs 4.4). Bottom line: choose QuillBot if you want to spend less; choose Sudowrite if you want the highest-rated option.
Which one should you choose?
When to choose QuillBot
Paraphraser, grammar checker, humanizer and AI detector in one suite
Pick QuillBot if you want to spend less.
When to choose Sudowrite
The AI writing partner built for novelists
Pick Sudowrite if you want the highest-rated option.
Frequently asked questions
What's the difference between QuillBot and Sudowrite?+
QuillBot: QuillBot is a writing suite built around its paraphraser (9 modes on Premium), with a grammar checker, a summarizer that handles up to 6,000 words, a 40+ language translator, a plagiarism checker (25,… Sudowrite: Sudowrite is an AI writing assistant built specifically for fiction — novelists, short-story authors, and screenwriters. The biggest differences come down to price, ratings, and features.
Which is cheaper, QuillBot or Sudowrite?+
QuillBot is cheaper at $8/mo — about 58% less than Sudowrite at $19/mo.
Which has the higher rating?+
Sudowrite scores 4.5 versus 4.4 for the other tool.
Does QuillBot or Sudowrite have a free plan?+
Both QuillBot and Sudowrite offer a free plan, so you can try either before paying.
Which is better for Writing?+
For Writing, Sudowrite is the stronger overall pick. Choose QuillBot instead if you want to spend less.