SpecialistInfinite visual canvas for brainstorming and diagramming, but less structured for text documents and wikis.

Paperguide records 371,972 monthly visits with -2.9% month-over-month growth and Freemium pricing. Notion records 173,441,670 monthly visits with +0.1% growth and Freemium pricing.
AI-native workspace for literature reviews and auditable systematic reviews
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | paperguide.ai | notion.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 371.97K (371,972) | 173.44M (173,441,670) |
| MoM Traffic Delta | -11.05K (-2.9%) |
| +201.2K (+0.1%) |
| Primary Market & Share | 🇺🇸 United States (25.6%) | 🇺🇸 United States (18.4%) |
|---|
| Direct Visits / mo | 121.59K | 135.18M |
|---|
| User Rating | 4.4 | 4.8 |
|---|
| Supported Platforms | Website | Website |
|---|
AI-native workspace for literature reviews and auditable systematic reviews
Ask a research question in plain language and get a synthesized answer drawn from PubMed, arXiv, OpenAlex and Semantic Scholar, with every claim linked to its source paper.
Run PRISMA-style reviews with a predefined protocol, recorded screening decisions, dual independent reviewers and a conflict resolver, and a PRISMA diagram generated from your actual counts.
Import from Zotero or Mendeley, add papers by DOI, and get metadata and open-access PDFs fetched automatically, with annotations and notes that feed every other workflow.
Define custom extraction columns and have AI fill them across many papers, with each value linking back to the sentence it came from, exportable to CSV or Excel.

The AI workspace where teams and agents get work done together
Combine docs, wikis, projects, and databases into one structured system of record that stays linked as your content grows.
Draft, summarize, translate, and answer questions inline, or build custom agents that automate recurring workflows around the clock.
Find answers instantly across Notion and connected apps, with citations so you can verify where each answer came from.
Use relations, rollups, views, and a large template gallery to model anything from a CRM to a content calendar.
SpecialistInfinite visual canvas for brainstorming and diagramming, but less structured for text documents and wikis.


Free / Open-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field


SpecialistSuperior for quick evidence-based academic search, but less of a comprehensive writing and reference suite.


Offers robust PDF analysis and literature search workspaces, but lacks advanced systematic review screening workflows.

SpecialistPowerful enterprise-wide search and knowledge discovery across apps, but lacks Notion's flexible doc creation.
Stronger automated evidence synthesis and systematic review extraction, but less focused on end-to-end reference management.
Stronger AI academic writing and autocomplete assistance, but less comprehensive for systematic literature mapping.
SpecialistIndustry standard for systematic review screening and deduplication, but weaker on AI writing generation.
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.

Free / Open-sourceFree visual research discovery and literature mapping tool, but offers less automated evidence synthesis and writing.
SpecialistUnmatched visual literature discovery and graph mapping, but lacks document drafting and reference management features.
Superior block-based typography and mobile note-taking experience, but fewer robust database and automation features.
SpecialistInfinite visual canvas for brainstorming and diagramming, but less structured for text documents and wikis.
Free / Open-sourceA free, AI-powered academic search engine for 240M+ papers across every scientific field
SpecialistSuperior for quick evidence-based academic search, but less of a comprehensive writing and reference suite.
Offers robust PDF analysis and literature search workspaces, but lacks advanced systematic review screening workflows.
SpecialistPowerful enterprise-wide search and knowledge discovery across apps, but lacks Notion's flexible doc creation.
Stronger automated evidence synthesis and systematic review extraction, but less focused on end-to-end reference management.
Stronger AI academic writing and autocomplete assistance, but less comprehensive for systematic literature mapping.
SpecialistIndustry standard for systematic review screening and deduplication, but weaker on AI writing generation.
SpecialistExcellent smart citation analysis to verify if papers support or dispute claims, but narrower writing capabilities.
Free / Open-sourceFree visual research discovery and literature mapping tool, but offers less automated evidence synthesis and writing.
SpecialistUnmatched visual literature discovery and graph mapping, but lacks document drafting and reference management features.
Superior block-based typography and mobile note-taking experience, but fewer robust database and automation features.