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SearchFree tier
Mainland China: not confirmed
Visual graph tool for exploring academic papers related to a seed paper.
以种子论文为起点探索相关学术论文的可视化图谱工具。
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
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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
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AI search and chat assistant that answers with citations, with free and Pro plans listed publicly.
Mainland China: not confirmed
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