Perplexity
AI answer engine that runs a live web search for every question and returns a synthesised answer with inline citations.
AI Search EnginesFreemiumCategory
AI Research Tools
Explore literature, organize evidence, and investigate ideas.
What to look for
Check database coverage, citation traceability, document limits, and summary accuracy.
Explore ai research tools
7 toolsFelo
Multilingual AI search engine built around cross-language retrieval - it searches in several languages simultaneously and returns a unified, cited answer, then can turn that answer into a mind map or presentation.
AI Search EnginesFreemiumElicit
AI research assistant for systematic literature review.
AI Research ToolsFreemiumConsensus
Academic search engine that answers yes/no research questions by aggregating findings across peer-reviewed papers and showing a 'Consensus Meter' indicating how much the literature agrees.
AI Research ToolsFreemiumScite
Citation analysis platform built around Smart Citations - it shows not just that a paper was cited but whether the citing paper supported, contrasted or merely mentioned the finding, with the surrounding sentence as…
AI Research ToolsSubscriptionSciSpace
All-in-one academic research workspace: an AI copilot that explains papers line by line, a literature review table builder, a paraphraser, an AI detector and a manuscript formatter for 40,000+ journal templates.
AI Research ToolsFreemiumGemini Notebook (NotebookLM)
Source-grounded research and note-taking tool.
AI Research ToolsFreemiumHow to choose: AI Research Tools
Every tool in this category can do the basics. The differences that matter show up in these areas:
- Database coverage
- Citation traceability
- Document limits
- Summary accuracy
Use the table below to shortlist, then open the full profile to read features, limitations and sources.
AI Research Tools compared
| Tool | Best for | Pricing model | Free plan | API |
|---|---|---|---|---|
| Perplexity | Any question where you need the answer AND the sources it came from. | Freemium | Yes | Yes |
| Felo | Research that spans languages - especially Asian-language sources. | Freemium | Yes | Not verified |
| Elicit | Systematic reviews and structured evidence extraction at scale. | Freemium | Yes | Not verified |
| Consensus | Fast evidence checks on empirical yes/no questions. | Freemium | Yes | Not verified |
| Scite | Verifying whether a claim has held up in the literature since publication. | Subscription | Not verified | Yes |
| SciSpace | Reading and understanding dense papers, especially for non-native English speakers. | Freemium | Yes | Not verified |
| Gemini Notebook (NotebookLM) | Answering questions from a closed, trusted set of your own documents. | Freemium | Yes | Not verified |
Strengths and tradeoffs
AI Research Tools: common questions
What should I compare when choosing ai research tools?
Check database coverage, citation traceability, document limits, and summary accuracy. These points matter more than headline features because they decide whether a tool fits your actual workflow.
Which ai research tools have a free plan?
In this directory, 6 of 7 listed tools have a free plan: Perplexity, Felo, Elicit, Consensus, SciSpace, Gemini Notebook (NotebookLM). Free plans have limits, so check each profile before relying on one.
How many ai research tools are listed?
7 tools are listed in this category: Perplexity, Felo, Elicit, Consensus, Scite, SciSpace, Gemini Notebook (NotebookLM).