If you're looking for a Sudowrite alternative, ProWritingAid is a broad suite of artificial intelligence tools to help you write better. It offers real-time checks, detection of passive voice, readability scores, plagiarism checks and detailed story analysis. ProWritingAid can be used within Microsoft Word, Google Docs, Scrivener and major browsers, so it's adaptable to many writing situations.
Another contender is HyperWrite, which promises to boost productivity and writing quality. It comes with tools like Flexible AutoWrite, Summarizer and Rewrite Content. HyperWrite learns your writing style and can help with research as you type, so it's good for students, freelancers and businesspeople.
If you need writing help with a variety of media, Wordtune is worth a look. It offers Rewrite for suggesting rewritten text with no errors, AI Writing Assistant for personal writing prompts and Summarizer for shortening documents. Wordtune integrates with Google Calendar, Microsoft Word and Slack, so it should fit into your workflow.