Search & research

Perplexity combines web search with conversational answers and source links, helping you investigate a question and then ask follow-ups. It is useful for orientation on unfamiliar topics and collecting starting points for further reading. Its free plan covers everyday searching, while advanced research and premium model access have much tighter restrictions.

Andi combines conversational search with web results, giving you a direct answer and links to explore further. Its public search experience also supports reading, summarizing, and explaining material. It is a convenient option for people who want AI-assisted search without creating an account, with a separate product for developers using its API.

Ask Brave brings an AI conversation interface into Brave Search, combining synthesized answers with webpages and other search results. You can start from a normal search and continue in the Ask view. It works in any supported browser, so you can try the service without installing the Brave browser first.

Consensus searches academic literature and connects answers to published research papers. It is useful for exploring what studies say about a question, tracing citations, and comparing evidence across a field. Basic paper search is freely available, while deeper synthesis, study snapshots, and more intensive research modes have separate usage allowances.

Elicit is an academic research assistant for finding papers, reviewing findings, and asking questions about available full texts. It organizes evidence around a research question, with linked sources that help you inspect the underlying literature. The free Basic tier is useful for exploration before committing to more intensive review workflows.

Felo offers AI-assisted search with quick answers and a more detailed professional-search mode. Its multilingual focus makes it useful for exploring information beyond a single language and organizing a topic into a clearer answer. Free access supports everyday lookup tasks, with a daily allowance for the more involved search mode.

Google's notebook-style research assistant helps you work with a collection of reference sources and ask questions about them. It can produce study materials and different overview formats from that source context. The former NotebookLM address leads to Gemini Notebook, where free users receive standard usage rather than unlimited generations.

iAsk is a question-and-answer search engine aimed at students and researchers. It presents cited responses and offers controls for answer detail, alongside tools for summarizing material and asking questions about documents. The free core answer engine is useful for an initial explanation, followed by checking the sources behind its response.

Open Knowledge Maps turns a research-topic search into a visual overview of related scientific material. Its AI-based approach groups resources so you can identify concepts and promising areas for further reading. The nonprofit service is particularly useful when you are new to a subject and want to understand its structure.

ResearchRabbit helps you discover scientific papers by exploring connections around articles you already know. Its visual citation relationships and collections support an iterative literature search, where each relevant paper leads to more possibilities. The free plan is useful for building and sharing a reading collection during an ordinary literature review.

SciSpace brings literature discovery, paper discussion, and research assistance into one website. You can use its tools to understand technical passages, explore relevant papers, and organize research tasks. Its agent handles more involved workflows using credits, while several other research utilities remain accessible after the agent allowance is exhausted.

Semantic Scholar is Ai2's free AI-powered discovery tool for scientific literature. It helps you find relevant papers and navigate research through scholarly metadata and related work. Rather than being a general conversational chatbot, it serves as an entry point for locating evidence and deciding which original studies deserve closer reading.

An AI search interface for researching questions and exploring web information with selectable search modes.

A literature discovery workspace that connects related academic papers and organizes them into visual research maps.

An AI research assistant that searches scientific literature and helps develop research questions through an ongoing conversation.

Upload a paper and highlight difficult passages to get plain-language explanations and ask follow-up questions.

An article summarizer that turns research material into structured summary flashcards for faster reading and review.

Now called Anara, this AI research workspace helps read, search, and discuss uploaded documents with linked research context.

Otio is an AI research workspace for collecting sources, asking questions about documents, and working through reading material. It helps keep source-based chats together in one place.