Perplexity alternatives

Perplexity: Ask anything, get an answer written from the web with every source cited. If it isn't quite right, here are 14 other AI research and search tools from Radar, in Radar's order.

1. 1NotebookLMTurns your own documents into a notebook you can question, and a podcast about them.Free
2. 2ElicitFinds the papers on a question and pulls the findings out into a table.Free plan
3. 3ConsensusAnswers questions from peer-reviewed studies, and shows how far they agree.Free plan
4. 4Semantic ScholarAi2's search engine for scientific papers, with one-line summaries of each.Free
5. 5Kagi AssistantThe ad-free search engine's assistant: the big models, grounded in Kagi's results.Paid
6. 6You.comSearch and research agents that write up what they find, with citations.Free plan
7. 7SciSpaceReads papers with you: explains passages, compares studies and drafts literature reviews.Free plan
8. 8SciteShows how a paper has been cited, supported, disputed or just mentioned.Paid
9. 9ResearchRabbitMaps the papers around the ones you care about, and keeps you posted on new ones.Free
10. 10Connected PapersA visual graph of the papers related to any one you start from.Free plan
11. 11UndermindA research agent that reads hundreds of papers to find the ones that really answer you.Free plan
12. 12LinerAn AI search engine for students and researchers, with trustworthy sources.Free plan
13. 13FeloMultilingual AI search that can turn its answers into slides and mind maps.Free plan
14. 14ChatPDFUpload a PDF and ask it questions; answers point back to the page.Free plan

Free to start: NotebookLM, Elicit, Consensus.