Data sources and licensing
Every figure on this site is derived from public sources. This page names them, states their licences, and is explicit about what we do not republish.
Sources we use
OpenAlex
openalex.org — an open catalogue of scholarly works, journals, authors and institutions, run by the non-profit OurResearch. It provides our journal list, article processing charges in USD including historical prices, citation statistics, topic assignments, publisher and country.
Licence: CC0. OpenAlex data is released into the public domain, so redistribution here carries no restriction. We attribute it because it is right to, not because we are required to.
Directory of Open Access Journals (DOAJ)
doaj.org — a curated index of open-access journals applying documented inclusion criteria. It provides the editorial metadata nothing else does: fee waivers, declared peer review models, licences, plagiarism screening, preservation, copyright terms, and average time to publication.
Licence: DOAJ metadata is openly licensed; see theirterms. We access it through the public API and link back to the DOAJ record on every journal page it covers.
ISSN Portal and PubMed
We link to portal.issn.organd to PubMed's journal catalogue so readers can verify a journal's identity and indexing at the authority itself. We do not copy their data; we send you there.
What we do not republish
Journal Impact Factors
The JIF is a licensed product of Clarivate, published in Journal Citation Reports. We do not hold a licence to redistribute it and we do not publish it. The citation metrics on this site are OpenAlex statistics — h-index, i10-index and 2-year mean citedness — which are computed from a different database over different source items and are not interchangeable with a JIF.
If your institution requires an impact factor for a degree or a promotion, you need Journal Citation Reports. Do not quote a figure from this site as one.
Scopus and Web of Science metrics
CiteScore, SNIP and SJR are Elsevier and Scimago products with their own terms. We do not reproduce them.
Full text and abstracts at scale
Where we show a fragment of an abstract in the research section, it comes from OpenAlex for an open-access article and links to the article itself. We do not host or mirror full text.
Accuracy and staleness
Data is a snapshot taken when the site was last built. Publishers change fees without notice, journals enter and leave registries, and citation counts move continuously. Nothing here should be treated as current to the day.
Before you act on a number — particularly a fee — confirm it on the journal's own site. Every journal page links there.
Where an upstream field is unreliable we omit it rather than publish it. Our methodology lists what we exclude and why.
Using our data
The underlying facts come from CC0 and openly licensed sources and we claim no ownership of them. Our compilation, wording and analysis are our own. You are welcome to cite this site and link to it. Please do not scrape the whole directory — the sources above will serve you better, and they are built for it.