Developer: Consensus | Free Plan: Yes ($0, limited monthly searches) | Starting Price: $15/month for Pro | Best For: Researchers who want a fast read on what peer-reviewed evidence says about a specific yes/no question
Developer: Elicit | Free Plan: Yes ($0, unlimited literature search) | Starting Price: $12/month for Plus | Best For: Researchers and graduate students doing literature reviews who need structured, citation-backed data extraction across many papers
Developer: Allen Institute for AI (AI2) | Free Plan: Yes ($0, every feature, no paid tier) | Starting Price: Free | Best For: Researchers and developers who want a free, comprehensive academic search engine and citation-graph API
Developer: ResearchRabbit (Litmaps) | Free Plan: Yes ($0, unlimited searches and collections, up to 50 seed papers) | Starting Price: $10/month for ResearchRabbit+ | Best For: Researchers who want to visually explore how papers in their field connect, rather than scroll a flat results list
Developer: Paperguide | Free Plan: Yes ($0, 1,000 credits covering most features) | Starting Price: $12/month for Plus | Best For: Researchers and grad students who want search, review, reference management, and writing in one workspace instead of several separate tools
