OpenXiv vs ChemRxiv
ChemRxiv covers: Chemistry and chemistry-adjacent (materials, chemical biology). Last updated 2026-05-20.
ChemRxiv is the chemistry preprint server, co-owned by the American Chemical Society, Royal Society of Chemistry, German Chemical Society, Chinese Chemical Society, and Chemical Society of Japan.
| Dimension | OpenXiv | ChemRxiv |
|---|---|---|
| Endorsement gate | None. | None, but submissions go through a moderation queue with subject-matter review. |
| AI policy | Four-level disclosure, per-paper refusal. | AI use must be declared; AI cannot be listed as an author. |
| Federation | AT Protocol. | None. |
| Post-publication review | Typed endorsements. | On-paper comments. No typed-review vocabulary. |
| Refusal model | Public refusal packet. | Editorial rejection during the moderation queue; the platform does not surface refusals publicly. |
| ISSN | Yes, ISSN 3120-9556, registered 2026-05-18 | No site-wide ISSN. |
| DOI | Roadmap. | DOIs minted on posting (Crossref). |
| Default license | CC-BY-4.0. | CC-BY-NC-ND default; CC-BY, CC-BY-NC, CC0, ACS AuthorChoice also available. |
| Source mandate | Source archive required. | PDF accepted; data and structure files encouraged but not mandated. |
| Eligibility | Independent researchers welcome. | Submissions are screened for subject relevance; affiliation is requested but not required. |
Source for the ChemRxiv column: https://chemrxiv.org. Where a field looks stale, the policy page on the competitor site is the authoritative source.
See also: About OpenXiv, FAQ, Policies, How to submit.