Criterion Julius AI Gemini Notebook (formerly NotebookLM)
CategoryAI Data AnalysisAI Research Tools
In one sentenceAn 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.
Problem it solvesMany people need answers from data but lack the coding or spreadsheet skills to get them quickly.Making sense of many long documents is slow, and general chatbots may answer from outside your material.
Free planYesYes
Developer APINoNo
Open sourceNoNo
PlatformsWebWeb, iOS, Android, Gemini app
Pricing (summary)Free plan with daily credits and Julius Lite models. Plus is $20/month ($16 annually), Pro $45 ($37 annually) and Business $450 ($375 annually) per month; Enterprise is custom. Annual billing saves 20%.
Checked 2026-10-19		Free with a Google account (100 notebooks, 50 sources each). Higher limits come with Google AI Plus, Pro and Ultra subscriptions; Google's plan page did not display prices in the fetched version, so check Google One for current amounts.
Checked 2026-10-19
Strengths
  • 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
  • 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