The 155 Best AI Knowledge Retrieval Tools for Your Problem in 2026

Stack Overflow | AI Assist, Qwen, Unibase AI Memory, Fluximg, 心流, AI Answer Generator: Get Question Answer Free, StructWise, BrowseWiz：为你浏览的 AI 助手, Globe Explorer, Yep.com are strong paid/free AI Knowledge Retrieval options for common problems.

Stack Overflow | AI Assist

Stack Overflow is the world's largest online community for developers to ask and answer programming questions.

Stack Overflow | AI Assist product preview

stackoverflow.com

Stack Overflow

05.0

Qwen

Qwen Studio is a free AI assistant powered by Qwen models, offering chat, image understanding, generation, and more.

Qwen product preview

2026 Manage Co

🇨🇳China

05.0

Unibase AI Memory

One private, encrypted AI memory you own — across ChatGPT, Claude, Gemini, Grok & Kimi.

Unibase AI Memory product preview

chromewebstore.google.com

05.0

Fluximg

A one-stop global eSIM guide, offering intelligent Q&A, authoritative data, and free usage, covering domestic (CN), Hong Kong, and international device models, as well as entry and exit scenarios.

Fluximg product preview

aboutesim.com

05.0

心流

常驻浏览器侧边栏的AI搜索助手，可解答问题、总结网页、提供创作灵感。

心流 product preview

chromewebstore.google.com

05.0

AI Answer Generator: Get Question Answer Free

Free AI Answer Generator Chrome extension that instantly provides accurate, tailored answers to a wide range of queries.

AI Answer Generator: Get Question Answer Free product preview

chromewebstore.google.com

05.0

StructWise

AI assistant for structural codes, providing instant access to accurate and latest building codes.

StructWise product preview

chromewebstore.google.com

05.0

BrowseWiz：为你浏览的 AI 助手

Boost your productivity: Use powerful AI in the sidebar to learn, research, write, and work faster.

BrowseWiz：为你浏览的 AI 助手 product preview

chromewebstore.google.com

DevPeer Tomasz Posłuszny

🇵🇱Poland

05.0

Globe Explorer

Globe Explorer is an AI-powered discovery and learning engine that provides intelligent and relevant search results.

Globe Explorer product preview

explorer.globe.engineer

05.0

Yep.com

Yep is a fast, accurate, AI-friendly search engine for both AI agents and humans.

Yep.com product preview

Ahrefs

🇸🇬Singapore

05.0

AI Chat

AI Chat is a Chrome extension providing instant access to Claude, ChatGPT, and Gemini models.

AI Chat product preview

chromewebstore.google.com

05.0

Ogt.ai

Advanced AI chat system for conversing with any media type, including images, videos, audio, and documents.

Ogt.ai product preview

Ogt.ai

05.0

ZhiNang.ai - AI assistant from anypage

ChatGPT anywhere on anytime in anypage now

ZhiNang.ai - AI assistant from anypage product preview

chromewebstore.google.com

05.0

TruthGPT - No Hallucinations, only Truth

TruthGPT is a Chrome extension that aims to provide maximum truth-seeking AI responses by validating information with ChatGPT and Bard.

TruthGPT - No Hallucinations, only Truth product preview

chromewebstore.google.com

Singularity Labs

🇺🇸United States

05.0

myReach Web Clipper

Save the things that matter on the web in an interconnected network

myReach Web Clipper product preview

chromewebstore.google.com

MYREACH S.A.

🇨🇭Switzerland

05.0

You.com: AI Search Assistant

You.com AI Search Assistant embeds trustworthy AI answers with citations beside your Google search results and provides a chat popover while you browse.

You.com: AI Search Assistant product preview

chromewebstore.google.com

You.com

05.0

knower - 你的知识助手

保存文章到knower，自动进行知识识别、分类、标引、整理、分析、聚合。

knower - 你的知识助手 product preview

chromewebstore.google.com

05.0

Slashspace (Formerly RabbitHoles AI)

AI-native infinite canvas for branching multi-model chat, deep research, and knowledge mapping.

Slashspace (Formerly RabbitHoles AI) product preview

Lokus

05.0

Knogra

An AI-assisted knowledge graph explorer for building spatial, scene-based maps of connected ideas.

Knogra product preview

Knogra

05.0

天工

天工是昆仑万维推出的超级AI智能体，具备DeepResearch能力，一键生成AI文档、PPT、表格及创意内容，助力办公学习。

天工 product preview

昆仑万维科技股份有限公司

🇨🇳China

05.0

秘塔AI搜索

MetaAI Search, no ads, direct results

秘塔AI搜索 product preview

05.0

Grokipedia

Grokipedia is an open source, comprehensive collection of all knowledge.

Grokipedia product preview

Grokipedia

05.0

Biblical AI

Biblical AI is a free-to-use AI assistant that provides comprehensive information about the Bible.

Biblical AI product preview

biblical-ai.com

biblical-ai

05.0

BlinkLife

An AI companion that remembers every message, meeting and thought, building a personal memory graph so you never start from zero.

BlinkLife product preview

Envisioning LLC-FZ

05.0

Adviserry

Adviserry reads everything your experts publish and drafts the specific moves worth making this week.

Adviserry product preview

Adviserry

05.0

Ask Linc

Ask Linc is a self-directed financial planning tool that connects your accounts and answers big money questions in plain language.

Ask Linc product preview

Ethan Teng Consulting

05.0

Hairporium

AI hair stylist that gives personalized hair plans for wigs, extensions, braids, hairstyles, haircuts and haircare.

Hairporium product preview

2026 Hairporium. All rights reserved. Start Free Co

05.0

askan.ai

Quality-checked AI answers you can cite.

askan.ai product preview

askan.ai

🇩🇪Germany

05.0

Sparkian

Sparkian is a collaborative AI workspace to chat, compare, create images, and research with 50+ models from OpenAI, Anthropic, and Google.

Sparkian product preview

Geekflare

05.0

PDFtoChat

Chat with your PDFs in seconds.

PDFtoChat product preview

pdftochat.com

05.0

Gadaa /Ask

Gadaa Ask sends your question to five independent frontier AIs and delivers one verdict: what they agree on, how strongly, and where they split.

Gadaa /Ask product preview

Gadaa

05.0

Deepmark

Deep search your bookmarks: one private library for browser, X, Instagram, and YouTube saves.

Deepmark product preview

usedeepmark.com

Deepmark

05.0

CSDN搜索

CSDN Search is the preferred AI search engine for developers, providing technical content search and navigation to common development resources.

CSDN搜索 product preview

15.0

ThinkAny

ThinkAny is a new-generation AI search engine that uses RAG technology to retrieve and aggregate high-quality content, combined with AI's intelligent answering capabilities to efficiently respond to user queries.

ThinkAny product preview

05.0

万知

Wanzhi is an AI Q&A and search platform that supports asking questions, searching, and writing assistance.

万知 product preview

01.AI

🇨🇳China

05.0

Gravytrainer

Gravytrainer lets you train an AI assistant on your content and embed it on your site, running on your Cloudflare account.

Gravytrainer product preview

gravytrainer.com

🇺🇸United States

05.0

Askee

Askee is a Chrome extension that lets you chat with any web page, YouTube video, or document.

Askee product preview

Askee

05.0

knowbuddy.ai

Message-based AI assistant that remembers you and proactively reaches out, no apps or downloads needed.

knowbuddy.ai product preview

knowbuddy.ai

05.0

Doclime

Doclime lets you chat with any PDF, get accurate answers with citations from your documents.

Doclime product preview

05.0

VEXA: AI for Google Meet and Knowledge Organization

AI assistant that enhances Google Meet in real-time and builds a unified knowledge base for quick insights and deep research.

VEXA: AI for Google Meet and Knowledge Organization product preview

chromewebstore.google.com

05.0

Smartbot

All-in-one AI platform combining ChatGPT, Claude, Gemini, Mistral, DeepSeek and Perplexity in a single interface.

Smartbot product preview

Smartbot

05.0

紫东太初

中国科学院自动化研究所和武汉人工智能研究院推出的新一代多模态大模型，支持多轮问答、文本创作、图像生成、3D理解、信号分析等全面问答任务。

紫东太初 product preview

taichu-web.ia.ac.cn

中科紫东太初（北京）科技有限公司

🇨🇳China

05.0

DocsMint

A document and knowledge workspace to create, organize, search, and share knowledge with people and AI tools.

DocsMint product preview

DocsMint

05.0

Sharper AI

An AI office assistant that turns your documents and connected apps into a verifiable knowledge base for research, writing, and analysis.

Sharper AI product preview

Sharper AI

05.0

xPrivo

Privacy-first, open-source AI chat assistant and independent search engine with anonymous, untracked usage.

xPrivo product preview

Restoflix

🇱🇺Luxembourg

05.0

Adapt

Adapt is an integrated AI coworker that connects to your company's tools to answer questions and automate work in Slack and on the web.

Adapt product preview

Adapt

🇺🇸United States

05.0

hAIve Mix

hAIve Mix queries up to 5 AIs in parallel and merges their answers into one, highlighting agreements and disagreements.

hAIve Mix product preview

Daniele Mori, ditta individuale

05.0

Simpledot

Simpledot is an AI decision engine that queries 50+ AI models and auto-selects the best answer.

Simpledot product preview

Simpledot

🇮🇳India

05.0

Memmy

Memmy is a local-first AI agent with a self-evolving memory foundation, letting the desktop app, CLI and external agents share the same long-term context.

Memmy product preview

05.0

trisAino

AI-powered China travel planner for international visitors.

trisAino product preview

trisAino

05.0

Buy Bitcoin Smart

Free, independent guide to buying bitcoin: country-specific exchange rankings, wallet reviews, and security advice.

Buy Bitcoin Smart product preview

buybitcoinsmart.com

buybitcoinsmart

05.0

mindmap.io

AI-native mind mapping tool where every node is a live AI conversation with branching context.

mindmap.io product preview

mindmap.io

05.0

Markovo

File to Markdown converter that turns PDFs, Office docs, images, audio, video, and public URLs into clean Markdown for AI, API, CLI, and MCP workflows.

Markovo product preview

Markovo

05.0

Wikis.ai

Ask one question, get multiple intelligent answers from top AI models side by side.

Wikis.ai product preview

05.0

Mem

Personal AI that remembers. Your life doesn't fit in a context window.

Mem product preview

05.0

Dexa

Ask anything and get answers directly from trusted experts.

Dexa product preview

Dexa

05.0

ReProof AI

The world's first self-learning biblical apologetics engine, indexing 1.7M+ sources to defend faith with cited answers.

ReProof AI product preview

ReProof.AI

🇺🇸United States

05.0

Tavern Scribe

Free TTRPG campaign tracker with maps, shared notes, a virtual tabletop, and AI recaps when you want them.

Tavern Scribe product preview

tavernscribe.com

Tavern Scribe

🇺🇸United States

05.0

Edith

Edith is a personal AI that calls you first, remembers what matters, and follows through via text.

Edith product preview

🇦🇺Australia

05.0

OpenParser AI

AI-powered platform to transform documents, databases, and websites into searchable knowledge with cited answers.

OpenParser AI product preview

OpenParser AI

🇺🇸United States

05.0