LanguageTool
Grammar & editingOpen-source grammar and style checker with self-hosting option
- Stars
- ★ 15.2k
- Licence
- LGPL-2.1
- Updated
Alternative to Grammarly, ProWritingAid

AI writing partner built specifically for fiction
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Sudowrite is an AI writing tool for fiction: drafting, brainstorming, rewriting and feedback on a novel or screenplay. It offers a free trial without a card, then credit-based plans from $10 a month (Hobby & Student) up to Max.
Open-source grammar and style checker with self-hosting option
Alternative to Grammarly, ProWritingAid
Command-line prose linter with custom style guides
Alternative to Grammarly, ProWritingAid
Online manuscript editing and analysis for fiction authors
Alternative to ProWritingAid, Grammarly
Readability highlighter for clearer, shorter sentences
Alternative to Grammarly, ProWritingAid
Windows novel organiser with built-in manuscript analysis
Alternative to Scrivener, ProWritingAid
Run open large language models locally for private drafting
Alternative to Sudowrite