01Comparison
AI Tools
ChatGPT Free vs Plus: five thresholds for solo work
Compare search, files, data analysis and Deep Research by where real work stops—not by a feature checklist alone.
EVIDENCE-LED TOOL RESEARCH
Choose tools with
clear criteria.
Plan pages, help centers, terms and update logs are scattered. We use AI to connect the primary sources and show what to choose, when to pay and what to verify.
RESEARCH INDEXLAST REVIEW / 08.19
18
research notes
published
AI Tools12 articles
Business SaaS3 articles
Reskilling3 articles
Sources first.
01
Start with primary sourcesCheck pricing, help and terms together
02
Keep conditions visibleNo context-free universal ranking
03
Date the evidenceSeparate publication and source checks
FEATURED RESEARCH
Start with a decision
02Deep dive
AI Tools
Can you enter confidential data into generative AI? A six-part check
Review the contract, account type, model-improvement setting, retention, connected services and the sensitivity of the input before sending it.
03Comparison
AI Tools
Are free AI meeting notes practical? Check Notta's limits and extra costs
Evaluate transcription minutes, per-recording limits, exports, speakers and privacy before relying on a free meeting workflow.
FIND YOUR QUESTION
Browse by the decision in front of you
01↗
Shorten work with AI
AI Tools
Compare pricing, limits, use cases and data terms on the same axes.02↗
Reduce recurring operations
Business SaaS
Evaluate the recurring workflow, total cost and exit—not only the entry plan.03↗
Choose the next skill
Reskilling
Compare workload, support, refunds and conditions beyond tuition.04↗
Understand the evidence
Research method
See how topics, claims, AI assistance and corrections are handled.LATEST
Recently published or updated
01Evidence checked
2026.08.19↗02Evidence checked
2026.08.19↗03Evidence checked
2026.08.19↗04Evidence checked
2026.08.19↗
AI Tools比較
Perplexity Free vs Pro: four research criteria beyond query counts
2026.08.19↗02
AI Tools深掘り
How to start a work research project in NotebookLM
2026.08.19↗03
AI Tools深掘り
Can you enter confidential data into generative AI? A six-part check
2026.08.19↗04
AI Toolsリーチ
How to turn off model training in ChatGPT without deleting history
2026.08.19↗
OUR POSITION
Do not rush AI to a verdict.
Collect evidence. Preserve differences.
ToolCriteria measures value by how much research it removes from a decision—not by how many articles it publishes.
About ToolCriteria ↗