Perplexity
AI Research
Answer engine that cites every source, built for research rather than chat.
✓ VerifiedFree tier
No reviews yet
Free tier available; Pro $20/mo or $200/mo; Enterprise $40/seat/mo
AI Research
Literature discovery, deep research agents and citation-backed analysis.
6 listings in this category.
Consensus
AI Research
Search engine that answers from peer-reviewed research.
✓ VerifiedFree tier
No reviews yet
Free tier available; Premium $11.99/mo; Pro $28.99/mo
Deep Research
AI Research
Multi-step research agents that read across sources before answering.
✓ Verified
No reviews yet
Included with ChatGPT Pro and Claude Max tiers
Elicit
AI Research
Systematic review assistant for screening thousands of papers.
✓ VerifiedFree tier
No reviews yet
Free tier available; Plus $10/mo; Pro $60/mo; Team $120/mo
NotebookLM
AI Research
Grounded research assistant that only answers from your own sources.
✓ VerifiedFree tier
No reviews yet
Free tier available; included with Google AI Pro and Ultra
scite
AI Research
Citation classifier that shows whether later work supports or contrasts a claim.
✓ Verified
No reviews yet
Personal $9/mo; Research $20/mo; Institution custom
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