✓
Tool
Category
Pricing
Free?
Updated
Keenious
AI Research
Freemium
✓
Mar 2026
→
AI that recommends relevant research articles based on your writing and notes.
Best for: research
PDF.ai
AI Research
Freemium
✓
Mar 2026
→
AI PDF tool for chatting, data extraction, and summarization with source highlights.
Best for: PDF