SciSpace
Read, chat with, and understand papers — an AI copilot for the PDF.
Tier 3 ToolsFreemium
Research Database Directory
Every research database, reviewed.
Research Rabbit
A free discovery engine that maps a field from the papers you already like.
Tier 2 ToolsFree
Litmaps
Interactive citation maps that keep your literature review alive.
Tier 3 ToolsFreemium
Inciteful
Fast, free citation-network analysis — find the papers that connect your papers.
Tier 3 ToolsFree
Undermind
Deep, agentic literature search — thorough where keyword search is shallow.
Tier 3 ToolsFreemium
Covidence
The systematic-review workflow — screening, extraction, and team collaboration.
Tier 2 ToolsFreemium
Rayyan
Fast, collaborative screening for systematic reviews — with a generous free tier.
Tier 2 ToolsFreemium
DistillerSR
Enterprise-grade systematic review automation — for audit-heavy evidence work.
Tier 3 ToolsSubscription
Citavi
Reference management plus knowledge organization — think, then write.
Tier 3 ToolsFreemium
Zenodo
CERN's catch-all repository — deposit any research output and get a DOI.
Tier 2 Open AccessFree