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Perplexity
An AI search engine. Ask a question in everyday language, and it searches the web, writes a direct answer, and links the sources it used.
Best for: Quick research, current topics, comparisons, fact-checking, and finding useful starting sources.
Source log: October 2026
Google AI Mode
A conversational version of Google Search. Type or speak a question, read an AI-organized answer, and ask follow- ups without starting over.
Best for: Everyday questions, shopping research, local information, explanations, and exploring a topic step by step.
Source log: October 2026
Gemini Notebook
Google's research notebook. Add PDFs, websites, videos, or notes, then ask questions and get answers tied to passages in those sources.
Best for: Understanding documents, studying, summarizing interviews, comparing sources, and creating audio overviews.
Source log: October 2026
Consensus
An AI search engine for scientific research. Ask a plain-language question, and it finds papers and summarizes what the studies report.
Best for: Checking health, science, psychology, education, and other questions against published research.
Source log: October 2026
Otio
An AI research workspace — chat with papers, citation graphs, exports to Zotero and EndNote.
Best for: Deep research projects with real citation management.
Source log: October 2026
Elephas
A private Mac AI assistant that keeps your documents on-device instead of uploading them.
Best for: AI help on sensitive documents that never leave your Mac.
Source log: October 2026
Elicit
An evidence-synthesis workspace that searches scholarly papers, creates structured research reports, screens studies, and extracts details into comparison tables. Higher plans add systematic-review workflows, alerts, exports, and API access.
Best for: Systematic and scoping reviews, evidence tables, study screening, comparing methods or outcomes, and turning a broad question into a traceable set of papers.
Source log: October 2026
Scite
A citation-intelligence platform that shows how later papers cite a study. Smart Citations label citation statements as supporting, contrasting, or mentioning, while Reference Check flags retractions and editorial notices.
Best for: Pressure-testing important claims, checking a manuscript's references, finding disputed evidence, and reading citation context instead of trusting citation counts alone.
Source log: October 2026
Research Rabbit
The beloved 'Spotify for papers' citation explorer — acquired by Litmaps and relaunched as freemium.
Best for: Falling down citation rabbit holes from one great paper.
Source log: October 2026
LitMaps
A literature-mapping platform for discovering papers through citation networks and saving them into living visual maps. Paid plans expand search, map size, alerts, and ongoing monitoring.
Best for: Tracking a research area over time, following citation chains backward and forward, maintaining a long-running literature map, and getting alerted when relevant work appears.
Source log: October 2026
SciSpace
An all-in-one AI research assistant: deep search across 280M papers, Copilot explanations, and an AI writer.
Best for: Reading and writing papers with an AI that knows the literature.
Source log: October 2026
Connected Papers
A visual similarity graph of related papers built from a single seed paper.
Best for: Seeing how a field connects instead of reading abstracts in a list.
Source log: October 2026
Paperguide
An AI research assistant with data extraction, an AI paper writer, and a reference manager in one workspace.
Best for: The full research loop — find, extract, cite, write — in one app.
Source log: October 2026