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Pick two to five tools. Every cell comes from a verified record; anything unverified says so. There is no overall winner — the right choice depends on your task, budget and technical needs.

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Criterion	Perplexity	Elicit	Consensus	Julius AI	Gemini Notebook (formerly NotebookLM)
Provider	Perplexity AI	Elicit	Consensus	Julius AI	Google
What it is for	An AI answer engine that searches the web and cites sources, with access to models from several providers on paid plans.	An AI research assistant that searches academic papers, extracts data into tables and produces research reports and systematic reviews.	An AI search engine that answers questions using peer-reviewed research, with Deep Search for literature-review style reports.	An AI workspace for analysing spreadsheets and databases in plain English, and creating charts, reports, slides and websites.	Google's source-grounded research notebook, renamed from NotebookLM to Gemini Notebook in July 2026.
Category	AI Research Tools, AI Chatbots & Assistants, AI Agents & Frameworks, LLM APIs & Model Platforms	AI Research Tools, AI Learning & Tutoring, AI Data Analysis	AI Research Tools, AI Learning & Tutoring	AI Data Analysis, AI Research Tools, AI Productivity Tools	AI Research Tools, AI Learning & Tutoring, AI Productivity Tools
Latest confirmed model	—	—	—	—	—
Main capabilities	Cited answers Pro Search (Depends on plan) Research (Deep Research) (Depends on plan) Model Council (Depends on plan) Brain (Preview)	Paper search Chat with papers Research Agent and Reports (Depends on plan) Systematic reviews (Depends on plan) Data extraction tables (Depends on plan) API and MCP server (Depends on plan)	Paper search Pro messages (Depends on plan) Deep Search (Depends on plan) Search API (Depends on plan)	Chat with data Data connectors (Depends on plan) Scheduled runs (Depends on plan) Presentations, websites, images and video (Depends on plan) Frontier models (Depends on plan) Team workspace (Depends on plan)	Source-grounded chat Audio Overviews Notebook code execution (Depends on plan) Gemini app sync Higher limits on paid Google AI plans (Depends on plan)
Inputs / outputs	Not documented	Not documented	Not documented	Not documented	Not documented
Context window	Not documented	Not documented	Not documented	Not documented	Not documented
Free plan	Yes 3 Pro Searches/day; 1 Research query/month; limited uploads	Yes Limited Research Agent and Reports usage	Yes 10 Pro messages and 3 Deep Searches per month	Yes Daily credits	Yes 100 notebooks per user; 50 sources per notebook
Cheapest paid plan	Education Pro: $10/mo With SheerID student verification	No monthly list price	No monthly list price	Plus: $20/mo $16/mo billed annually	No monthly list price
All plans	Free — Free Pro — $20/mo $17/mo billed annually $200/year Education Pro — $10/mo With SheerID student verification Max — $200/mo $167/mo billed annually $2,000/year; annual billing on web only Enterprise Pro — $40/mo $33.33/mo billed annually Per seat; $400/seat/year; $30 or $300 for eligible education/nonprofit Enterprise Max — Price not listed on pages checked	Basic — Free Pro — $588 billed yearly; separate monthly-billing price not shown Scale — $2,028 billed yearly; separate monthly-billing price not shown Enterprise — Contact provider	Free — Free Pro — Price not readable on official page; annual billing discounted Deep — Price not readable on official page Team — Per seat, volume pricing Enterprise — Contact provider	Free — Free Plus — $20/mo $16/mo billed annually Pro — $45/mo $37/mo billed annually Business — $450/mo $375/mo billed annually Per workspace Enterprise — Contact provider	Standard (free) — Free Google AI Plus — Bundled with Google AI Plus subscription; price not displayed on fetched page Google AI Pro — Bundled with Google AI Pro subscription; price not displayed on fetched page Google AI Ultra — Bundled with Google AI Ultra subscription; price not displayed on fetched page
API access	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)	Yes · docs (opens in a new tab)	No	No
Free API quota	None documented	None documented	None documented	None documented	None documented
API pricing	sonar input/output: $1 per 1M tokens (input and output each) sonar-pro input: $3 per 1M input tokens sonar-pro output: $15 per 1M output tokens sonar request fee (low context): $5 per 1,000 requests	Included in Pro and above, subject to plan usage limits	API call beyond included credits: $0.05 per call	—	—
Open-weight / proprietary	Proprietary	Proprietary	Proprietary	Proprietary	Proprietary
Commercial use	See plan terms	See plan terms	See plan terms	See plan terms	See plan terms
Privacy & data	Enterprise plans state data is never used for training; Enterprise Max adds configurable data retention.	Enterprise states no training on your data by default.	—	7-day file storage on Plus, Pro and Business; permanent on Enterprise	Workspace editions offer expanded access under Workspace terms; administrators can turn Gemini Notebook on or off for users.
Platforms & integrations	Web, iOS, Android, Comet browser	Web, API, MCP	Web, API	Web	Web, iOS, Android, Gemini app
Learning curve	Beginner-friendly	Some experience helps	Beginner-friendly	Beginner-friendly	Beginner-friendly
Advantages	Strong focus on citations Multi-provider model access Published enterprise limits	Built specifically for academic literature Structured extraction API and MCP integration	Focus on peer-reviewed evidence Simple question-based interface Student pricing	Accessible data analysis Warehouse connectors Wide set of creation tools	Strong grounding in user-provided sources Free tier is usable for real projects Integrated with Google's Gemini ecosystem
Limitations	Free plan has tight Pro Search and Research limits Pro limits described as 'average use' rather than numbers API billed separately from subscriptions	Basic plan limits agents and reports Paid plans are relatively expensive for individuals Quality depends on paper coverage and abstracts	Paid plan prices not visible in the official sources fetched Deep Search capped per month Not a full systematic-review tool	7-day file storage on most plans Credit-based usage can be hard to predict No public API documented on official pages checked	Free tier capped at 100 notebooks and 50 sources per notebook Code execution limited to higher paid tiers at launch Name change may cause confusion with notebooks inside the Gemini app
Last verified	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026	Oct 19, 2026

How to choose

Start from the rows that matter for your job: a free plan and learning curve for casual use; API access, rates and data terms for building products; context window and modalities for long documents or images. Provider claims are labelled as such; we do not rank.

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