10 Best AI Research Assistants of 2026

Elicit is built around the literature review rather than the chat window. The free Basic plan searches more than 138 million papers, summarizes as many papers as you want, lets you chat with full-text papers and shows the sources behind each answer, with Zotero import for an existing library. Plus, at $11 per user a month billed as $132 a year, adds exports to RIS, CSV, BIB, PDF and DOCX, search across more than 500 thousand clinical trials and standard usage of Research Agent and Research Reports. Pro adds the feature that sets Elicit apart: a dedicated systematic review workflow that screens 5,000 papers, 20 extraction columns at a time, explanations for AI answers and API access. Scale adds figure extraction and live collaboration. The trade-offs are that formal review tooling sits on Pro, the pricing page shows more than one price set so you should confirm yours, and Elicit is a scholarly tool, so business analysts asking about markets will get more from a web research assistant.

Perplexity is the fastest route from a question to an answer with links. It searches the web and cites the pages behind each answer, which makes it practical for analysts checking a market figure or students getting oriented in a new topic. Pro costs $17 a month on annual billing and adds deep research, access to top models with the option to pick between them, higher usage limits and memory, and expanded access to Perplexity Computer, which builds documents, apps and tools from a prompt. The model list on the Pro page includes options from OpenAI, Google, Anthropic, xAI, Moonshot AI and Z.ai. Max, at $167 a month billed annually, adds the highest usage limits, expert level research and frontier models. The limits for research work are that Perplexity does not document paper screening, extraction tables or reference manager exports, so it complements a scholarly tool rather than replacing one for a formal literature review.

Consensus answers questions from the research literature instead of the open web. It searches 400M+ peer-reviewed papers and scholarly works, and its agents read the papers, pull the data and cite each claim. The free plan keeps basic paper search and includes 10 Pro messages and up to 3 deep reviews a month, which is enough to test it on a real assignment. Pro, at $12 a month billed as $144 a year, removes the cap on Pro messages, raises deep reviews to 15 a month and opens every research tool, including the citation graph, plus five times the API and MCP usage. Deep is aimed at researchers and clinicians who run frequent literature reviews, with 200 deep reviews a month. Students, faculty with a school email and US clinicians with an NPI number can get up to 40% off. The caveats are that it only searches scholarly literature, and the deep review allowance decides which plan you need, with Deep at $45 a month billed annually.

Gemini Notebook, the product formerly called NotebookLM, takes a different approach from the search tools on this list. You add your own sources, such as papers, lecture notes or reports, and its answers are grounded in that material. The free plan allows up to 50 sources per notebook with standard limits on chat and generated Slides, Audio Overviews and other outputs. Google AI Plus at $4.99 a month doubles the limits and allows 100 sources, while Google AI Pro at $19.99 a month gives four times the limits and 300 sources. For a literature review, Google says it synthesizes hundreds of sources into Reports, and Source Discovery or Deep Research can bring in new material from inside the notebook. Students can turn class material into Audio Overviews or Flashcards. The limits are that it relies on what you give it, it does not document reference manager exports, and paid plans are only sold in specific regions.

Gemini Deep Research is an agentic feature in the Gemini app. You type a question, it proposes a multi-point research plan that you can change, then it browses up to hundreds of websites, reasons over what it finds and writes a multi-page report in minutes. If you allow it, it also draws on your Gmail, Drive and Google Chat, which helps analysts combine public data with internal notes. You can upload your own files and turn finished reports into Audio Overviews, quizzes or interactive content in Canvas. Deep Research is listed on the free Gemini plan, and Google AI Plus at $4.99 a month doubles usage while Google AI Pro at $19.99 a month gives four times the free limits. Google lists it in 150 countries and more than 45 languages. For academic work, the weakness is that it searches the web rather than a scholarly index, so students should check that cited pages are primary sources.

Deep research in ChatGPT turns a multi-step question into a documented report. You describe the outcome, ChatGPT proposes a research plan you can edit, and you can follow its progress and interrupt to change focus or sources. By default it searches the public web, files you upload and connected apps, and depending on your plan and workspace those apps can include Google Drive, SharePoint and industry data services. A Sites setting lets you restrict research to chosen domains or just prioritize them, which is useful when an analyst wants answers only from official statistics sites or journals. The report comes with citations or source links. Free includes limited deep research, Go costs $8 a month in the US, and Plus at $20 a month expands deep research. The drawbacks are that usage depends on the plan, the cheaper plans are limited, and it is not built on a scholarly paper index, so citation quality depends on the sites you allow.

Scite answers a question most AI assistants skip: what did later research say about this paper. It has indexed more than 1.6 billion citations across more than 300 million scholarly sources and classifies whether citing studies support or contradict a claim. Basic costs $12 a month billed yearly and covers the full Assistant and Search, Smart Citation reports, collections up to 1,000 papers, citation alerts and 250 MCP credits a month. Pro, at $40 a month billed yearly, adds API access, collections up to 10,000 papers, 2,500 MCP credits and patent, clinical trial and grant datasets. The Zotero plugin and browser extension show citation data where you already read, and library holdings give full text through your institution. Enterprise adds regulatory datasets such as FAERS and 510(k). The downsides are that there is no free plan beyond a 7-day trial, the API sits on Pro, and Scite is a scholarly tool that will not help much with market research.

Undermind is a literature search tool for scientists rather than a general chatbot. A deep search reviews thousands of papers and brings the relevant ones into a workspace, it fetches open-access PDFs and lets you upload the rest, and its agent reads full texts and figures before writing a report in which each citation is verified. Monitoring can keep watching for new publications on a topic. The free plan includes strong models for chat, deep searches and reports, shared workspaces and connections to agents such as Claude and ChatGPT, with standard rate limits. Pro costs $16 a month billed annually and adds the latest models, deeper full-text analysis, ten times the usage and unlimited workspaces, files and paper libraries. Team is $15 per person a month billed annually with member management and centralized billing. The drawbacks are the science focus, which limits it for business analysts, and a Pro price above several rivals on this list.

ResearchRabbit is a discovery tool rather than an answer engine. You start from one or more seed articles and it shows related papers, citations and co-authors, so you can follow a topic outward and spot the authors and gaps in a field. The free plan is generous: unlimited searches across more than 310 million articles, an unlimited library and collections, shared collections for collaboration and up to 50 seed articles. ResearchRabbit+ costs $10 a month on the annual plan or $12.5 monthly at the default rate that covers the US, UK and Canada, and it adds up to 300 seed articles, advanced search controls, multiple projects, Signals alerts and faster support. RR+ is discounted in more than 100 countries based on purchasing power. Institution plans add LibKey integration and usage statistics. The limit is clear: it does not summarize papers or write a review, so most people use it next to an AI assistant that does.

SciSpace tries to cover the whole research cycle in one workspace. Premium includes unlimited Chat with PDF and literature reviews, Deep Research access, systematic research, standard reports, papers from Google Scholar, PubMed and arXiv, full-text papers through your institution where eligible, a Biomedical Agent and up to four parallel agent chats. Advanced adds Pro and Expert models, citation-verified reports, Word edits with track changes, slide, figure and poster generation, and peer review support. Max raises limits further with up to 16 parallel chats, and Enterprise adds SSO, SCIM and shared credit pools. All plans carry a 24-hour money back guarantee. Premium costs $12 a month billed annually or $20 monthly, and Advanced costs $70 a month billed annually. Before buying, check that the plan you need includes citation-verified reports, and note that Premium bundles AI detection and humanizing tools that many universities do not allow for coursework.