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SearchFree tier
Mainland China: not confirmed
Developer-focused answer engine for coding questions, with free use and paid options.
面向开发者的编程问答搜索引擎，有免费使用与付费选项。
Marked “not confirmed” because NavBoth only checked public pages and did not verify access from mainland China.
SearchFree tier
Search tool that answers from research papers and shows the academic sources it used.
Mainland China: not confirmed
View listingSearchFree tierEditor's pick
Answer engine that searches the web and shows citations beside the reply, with a free tier and a paid Pro plan.
Mainland China: not confirmed
View listingSearchFree tier
AI search and chat assistant that answers with citations, with free and Pro plans listed publicly.
Mainland China: not confirmed
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