Home Announcements

DOI Lookup

Verify a DOI's registration status, external visibility, and metadata quality across Crossref, OpenAlex, and OpenCitations.

Enter DOI

Supports any DOI. PSG DOIs use the prefix 10.63802.

Open scholarly citation index: journal coverage, citation analytics, and subject rankings — reproducible from public data.

CC BY 4.0OPEN INFRASTRUCTURE

Ratings & Rankings

Ratings Overview
Early-Stage Rankings
Mature Journal Rankings
Citation Rankings
PSC Subjects

Coverage

Core Collection
Global Benchmark Collection
Submit Journal

Methodology & Data

PCI Methodology
Editorial Selection
Evidence
Open Data
All Journal Records

Organization

About POSI
Conflict of Interest
Responsible Use
Contact
Privacy Policy
Terms of Use

Open InfrastructureCrossref OpenAlex DOAJ ROR ORCID OpenCitationsPOSI Open Dataposi-data ↗posi-engine ↗

© 2026 Panorama Scholarly Group Ltd. Curated metadata freely available for reuse.

Conflict of Interest Disclosure panorama-sg.com research.panorama-sg.com