AI Search Engine

Perplexity

AI answer search engine: You can get conclusions with cited sources by asking questions in natural language. It supports follow-up questions, multiple retrieval modes and document upload-based Q&A, making it suitable for retrieval scenarios that require checking while searching.

Consensus

An AI academic search engine for peer-reviewed literature. You can retrieve evidence from 250 million papers by asking questions in natural language, visually present the consensus and divergence of research conclusions, and support Deep Search automated reviews and medical modes.

Kagi Search

A search service that charges users directly, with ads and trackers removed, and customizable result pages; it comes with an AI assistant, a tracker-free browser, and tools such as translation, news briefings, and long article summaries.

Liner

An AI search and research tool for professionals, providing answers with cited sources, academic paper retrieval and comparison, and literature reviews. It supports searching, writing, and editing in the same window.

Metaso

Ad-free Chinese AI search engine that directly outputs answers with sources, supports switching between the entire internet, academic and library scopes, and provides in-depth research, file upload Q&A and voice input.

Anara

Anara is an AI research workbench for scientific research scenarios. It can search literature databases and full-network papers, conduct comprehensive analysis and table extraction across more than a thousand documents, and automatically provide clickable and verifiable citation sources during writing.

Wolfram|Alpha

A computational knowledge engine based on the Wolfram Language and over 35 years of R&D accumulation. Input natural language or mathematical expressions to get expert-level answers and step-by-step solutions, covering four major categories: mathematics, science and technology, society and culture, and daily life.

alphaXiv

An open platform providing discussion forums for arXiv papers, where each paper can be commented on, questioned about, and annotated. Meanwhile, it aggregates popular papers by theme to help users quickly keep up with the cutting-edge developments in the AI field.

ima

The AI Knowledge Steward launched by Tencent supports building personal and team knowledge bases, performing question answering and retrieval on imported materials, and generating PPTs, podcasts and research reports based on the materials, targeting scenarios of data organization and content creation.

Rayyan

AI-driven systematic literature review platform, officially used by millions of researchers for screening, deduplication and PICO extraction. It supports multi-person collaboration and audit trails, and also offers mobile access and risk of bias assessment. The basic version is permanently free.

Bohr AI

Bohr is an AI for Science space station for global scientists, offering literature search and structured Q&A, knowledge base dialogue, first draft generation of review articles, manuscript review and scientific figure drawing, along with supporting scientific computing power and experimental resources.

Felo

A multilingual AI search platform for research and creation, its official website positioning is "Search, understand and create with AI". In addition to cross-lingual search, it also provides AI slides, mind maps, document and image generation, as well as custom Agents.

Exa

A search API for AI agents that provides real-time web data, deep research, and structured content through a single endpoint, with highlighted, token-efficient results for Q&A, research, and coding agents.

Zhihu Zhida

Zhihu Zhida is an AI large model search product launched by Zhihu. Based on the Zhihai Chart large model, it integrates Zhihu community and multi-source information. It provides ad-free direct access to answers and supports in-depth/brief modes as well as multi-round follow-up questions, making it suitable for professional and popular science retrieval.

Grokipedia

This AI encyclopedia site, where entries are written and verified by Grok, shows on its information page that it is developed by xAI and was launched in 2025. Readers cannot directly edit the entries and can only submit suggestions. According to the site's data, there are approximately 6.09 million articles on the platform.

scite

An AI tool for academic research, which uses intelligent citations to indicate whether papers are supported or refuted, has a search coverage of over 300 million articles, preprints and patents, can be integrated with Claude, ChatGPT and Zotero, and provides verifiable evidence.

ResearchRabbit

An AI tool focused on literature review, which generates citation maps from a seed paper and continuously recommends relevant literature, new authors and emerging directions. Its official website shows that it has access to over 310 million papers, and registration is free.

Seekee

Seekee, an all-in-one AI assistant launched, integrates AI search, PDF conversion, image editing, speech-to-text and photo recognition, and can be switched and used within one application.

Undermind

Undermind is an AI co-researcher for researchers, focusing on the literature domain. It can read full texts and charts, retrieve along citation chains and cite point by point, and help users build a dynamic literature library from broad to in-depth.

Litmaps

A literature management software for literature reviews connects the process of finding papers and sorting out the context through four steps: discovery, visualization, collaboration and monitoring, and it can also generate BibTeX citations. It is suitable for graduate students and researchers who write literature reviews and prepare research proposals.

KNIME

KNIME is a free and open-source data analysis platform. It uses visual nodes and workflows for ETL, analysis, predictive AI and agent building, and can connect to numerous data sources and be deployed in enterprise production.

Lessie AI

An AI people search engine for business development. It uses natural language to describe the target audience, searches across multiple public platforms and scores by matching degree. It is suitable for finding influencers, sales leads, investors and candidates.

Meilisearch

Meilisearch is an open-source ultra-fast search and AI retrieval platform. It provides full-text, semantic, hybrid and multimodal retrieval, supports vector storage, and can be deployed on the cloud or self-hosted. Officially, it is said to be used by more than 20,000 teams.

Zemith

An AI workbench that aggregates multiple mainstream models. With one subscription, you can have conversations, conduct in-depth research, generate text, images and videos, and export documents and slides. It is suitable for students, creators and teams who frequently switch models.

Lianqi AI

Lianqi AI is an AI platform for bidding and business leads, providing full-network bid announcement retrieval, AI business opportunity assistant and AI tender document writing, covering technical tenders, commercial tenders and a full-process Buddy workspace.

Linkup

Linkup is a web search API for AI applications. It provides source-cited online answers, supports search, research and private indexing, and the official claims that it outperforms other models on benchmarks such as SimpleQA.

Qiewen Academic

An AI academic search and literature discovery tool for researchers, supporting deep retrieval, citation network expansion, knowledge base Q&A, and paper reproduction. Its official website states that it can track research trends and provide personalized recommendations.

Onyx

An open-source enterprise-level AI search and knowledge assistant that can concurrently retrieve multiple internal data sources and retain existing permissions, supports private deployment and switching of any model, and is suitable for teams to search for information across systems, perform Q&A, and provide context for intelligent agents.

Devv AI

Devv is an AI programming agent for independent developers and small teams. It can turn ideas into full-stack AI applications, with natively integrated authentication, databases, image generation and other features, reducing the threshold from prototyping to launch.

Otterly.AI

AI search visibility monitoring tool that tracks mentions and references of a brand in responses from multiple AI engines, provides prompt engineering research, content auditing and optimization suggestions, and is suitable for SEO and content teams.

Komo

AI search engine that retrieves web pages after a query and provides answers with sources. It offers three modes: Web Search, Find People, and In-depth Research. Among them, Firsthand is specifically designed to find real people who can answer questions that AI cannot, and search results can trace back to history.

Flow

Flow is an AI knowledge assistant that can answer questions in real time with internet access, summarize long articles and web pages, and assist in writing documents. It covers a wide range of knowledge needs from life encyclopedias to professional academics, helping you quickly enter a state of flow.

Reportify

Reportify is a financial investment agent that provides investment analysis, quantitative stock selection and document search, supports the creation of skills and agents, and helps individuals make investment decisions through interrogative research.

iAsk

A free question-and-answer search engine for students and researchers, its official website focuses on being free of hallucinations and providing authoritative citations. It supports document analysis, web and file summarization, and can be used as a homework tutoring and information inquiry tool.

genei

An AI tool for research and writing, which uses self-developed algorithms to automatically summarize literature, analyze research and locate key information, helps produce blogs, articles and reports faster, and offers a 14-day free trial.

Chance AI

Chance AI is a visual recognition app for asking questions by taking photos. Just point your phone at a photo or screenshot, and you can get the name, clues and interpretation of cultural background. The official says that search without input and continuous questioning are all centered on the current picture.

marmos

A conversational data analysis tool under the Tencent ecosystem that can connect to databases or local files, generate SQL, visual dashboards and reports through conversations, and support workflows, subscription alerts and team collaboration.

ASReview

An open-source literature screening tool coordinated and developed by Utrecht University in the Netherlands uses active learning for screening and learning simultaneously and sorts by relevance, significantly reducing the screening time for systematic reviews. It is fully open-source and compliant with GDPR.

ReadPaper

A domestic paper reading tool integrates academic translation, AI-assisted reading, literature management and citation generation into a single client, and also features a citation graph covering all disciplines. It is suitable for students and researchers who need to read a large number of literatures and write review articles.

Elicit

AI research assistant: Enter a research question to search over 125 million papers, automatically generate cited structured research reports, and support data extraction, systematic literature reviews, and library alerts.

TXYZ

An AI academic workbench for scientific research scenarios integrates paper retrieval, in-depth reading and writing assistance into a seamless workflow. It supports uploading and analyzing full documents, and offers annual subscription tiers ranging from free to high-end.

MemFree

MemFree is a hybrid AI search tool that draws from knowledge bases and the internet. It first indexes web pages, local files, and browser bookmarks before conducting a unified search. It also supports asking questions based on images and generating web pages.

CamoCopy

CamoCopy is an AI assistant and search engine with privacy as its core selling point. The official states that it encrypts chats, documents and images, provides image proxy, and also offers workspace, self-destructing files and enterprise edition solutions.

Domery

A domestic full-link data AI assistant for data teams, according to its official website, it covers event tracking design and code generation, multi-source data access, semantic library management and AI visualization, and supports switching of multiple models.

ChatSPSS

The online statistical analysis tool launched by Chengdu Nature Intelligence Technology supports uploading CSV, Excel, SPSS and Stata data. According to the official website, it covers more than 27 statistical methods and automatically generates three-line tables and interpretations.

SuperBench

The Comprehensive Capability Evaluation Ranking of Large Models, released by the Tsinghua University Center for Basic Model Research in collaboration with the Zhongguancun Laboratory, promotes fair, open, and systematic large model evaluation and technological progress through bi-monthly reports.

AMiner

An AI-driven technology intelligence and academic search platform, which, according to the official, provides scholar portraits, paper retrieval and AI research assistants. It can assist in designing experiments, building review frameworks and writing paper introductions, and uses intelligent agents to track and summarize the latest papers every day.