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WritingFree tier
Mainland China: not confirmed
Multilingual grammar and style checker, open-source core with free and Premium plans.
多语言语法与风格检查器，核心开源并有免费与 Premium 方案。
Marked “not confirmed” because NavBoth only checked public pages and did not verify access from mainland China.
WritingFree tier
Writing assistant for grammar, tone, and rewrites, aimed mainly at English, with free checks and paid plans.
Mainland China: not confirmed
View listingWritingPaid
Marketing-copy product for campaigns and brand voice. Jasper sells it on paid plans.
Mainland China: not confirmed
View listingWritingFree tier
Perplexity's tool for turning research into shareable article-style pages with citations.
Mainland China: not confirmed
View listing