“Deep research helps you accomplish complex online tasks by reasoning, researching, and synthesizing information”
Free planPaid from $8 a month
Pricing page lists "Limited deep research" on Free and Go; Plus "Expanded deep research"; Pro "Maximum deep research". Help center: "Deep research usage varies by plan." Exact task counts not published on the pages read.
Your data
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“Save hours of work with Deep Research as your personal research assistant.”
Free planPaid from $4.99 a month
Deep Research is listed among free Gemini features; free usage limits are not stated in numbers. Paid plans give "higher usage limits".
Your data
What it does with your data“Google uses your activity to provide, develop, and improve its services (including training generative AI models)”
Gemini Apps Privacy Hub, Oct 19, 2026
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“With research, Claude investigates your question in depth.”
No free planPaid from $20 a month
Research is not on the Free plan (pricing table: Research "No" for Free). Available on Pro, Max, Team and Enterprise.
LatestIntroducing Claude Haiku 5.5Oct 7, 2026
Your data
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“Perplexity Pro unlocks more ways to learn and get work done.”
Free planPaid from $10 a month
Free (Standard): Pro Searches "3/day", Research Queries "1/month", "Practically unlimited basic searches".
LatestUltrafast Computer models, Decisions API, and connector controlsOct 19, 2026
Your data
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“AI Mode is Google’s most powerful AI search experience.”
Free planPaid from $4.99 a month
No price for AI Mode itself on the pages read. Gemini 4 Argon in AI Mode is limited to "Google AI Pro and Ultra subscribers 18 and above", with daily usage limits.
LatestMore ways to connect with the web from SearchOct 15, 2026
Your data
What it does with your data“Google uses people's interactions with Search and these AI experiences”
Google Search Help: AI Mode, Oct 20, 2026
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“Agentic AI features that get things done for you, including advanced research and analytics1”
Free planPaid from $9.99 a month
Free Microsoft account: "Limited usage with a free Microsoft account". Advanced research is listed on Microsoft 365 Premium.
Your data
What it does with your data“If you are logged into Copilot with a Microsoft Account or other third-party authentication, you can control whether your conversation activity is used for training Microsoft's generative AI models.”
Microsoft Support: Privacy FAQ for Microsoft Copilot, Oct 20, 2026
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“The AI Research Assistant”
Free planPaid from $11 a month
Basic (free): limited Research Agent and Research Reports; unlimited search across more than 138 million papers.
LatestRoutines and more flexible research with the AgentSep 30, 2026
Your data
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“Consensus is an AI search engine for research.”
Free planPaid from $20 a month
Free Tier per month: unlimited Papers searches, 10 Pro messages, 3 Deep reviews, 10 Study Snapshots.
Your data
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“We're renaming NotebookLM to Gemini Notebook.”
Free planPaid from $4.99 a month
Standard (free): Notebooks "100/user", Sources "50/notebook".
LatestNotebookLM is now Gemini NotebookJul 16, 2026
Your data
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“Kagi Assistant combines the top large language models (LLMs) with optional results from Kagi Search”
No free planPaid from $5 a month
No free plan; a free Trial is capped at 100 searches and 100 Assistant interactions. "Assistant is available to all members."
LatestSmarter search widgets, Privacy Pass upgrades, and a calmer AssistantOct 16, 2026
Your data
What it does with your data“By default and unless otherwise stated, Kagi Assistant automatically deletes conversation threads after one day.”
Kagi Privacy Policy, Sep 22, 2026
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“Now live on our website, app, and API.”
Price not shown
Not verified from a fetched page (see unverified). DeepSeek's own pages read did not state prices or a free/paid split.
LatestDeepSeek-V4.1-Flash-1017: Wish-Driven Programming Made RealOct 17, 2026
Your data
What it does with your data“To provide you with our services, we directly collect, process and store your Personal Data in People's Republic of China.”
DeepSeek Privacy Policy, Feb 10, 2026
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“With a single command, it can generate a full research report”
Free planPaid prices not shown in US dollars
SCMP (2026-08-11): "The Qwen chatbot remains free to use."
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