Preprints, reviewed in the open.
Any discipline.
Your pick of AI reviewers, named on every report.
Expert certification when you want it.
Submit Manuscript · Browse Preprints
More on our mission: Read the XSci Story.
XSci Open Review Competition 2026
100 papers.
100 expert reviews.
On us.
Not selected? Your paper keeps its DOI and its public AI referee report, you can answer that report on the same page, and you get $49 off XSci Human Review service.
- $500 award per certified paper with a public report
- 100 papers get a paid expert review
- Free to enter, any discipline
Opens 25 September 2026
Closes 30 November 2026, 23:59 AoE
Three things XSci does
1. Post
We never charge you to publish.
- Free
Posting a preprint costs nothing. - Yours
No exclusivity. Submittable to any journal afterwards. - Instant
Published at once with DOI.
2. Review
Pick from the top AI reviewers, in one place.
- Choose who reviews you
Reports arrive in minutes to hours. Each is a report, written by the reviewer named on it. None of them is a certification. - Review in the open, and get a discount
Because a report only the author can see helps one person. A report on the page helps everyone who reads the paper.
- 0h
Reports arrive. Only you can see them. - 48h
You read them first. Publish the report at a discount, or keep it private at full price. - Then
The report is on the page, next to the paper, for anyone who reads it.
3. Certify
One qualified expert. Your target journals. A yes or a no.
- Who reviews
An expert from one of the following groups: authors you cite, their co-authors, or authors who have published in your target journals or top journals in your field by default. - What they judge
Whether the paper, after reasonable revision(s), has the potential to be published in the target journals of your choice, or in the top journals in the field. - What you get
A badge XSci Peer-Certified Preprint on the page with records of the manuscript version, the target journals, and the certified date if yes. It stays as XSci Preprint if no.
Recent preprints
- A Bayesian Hidden Markov Model with Singh–Maddala Emission Distributions for Heavy-Tailed Regime-Switching Time Series
- The Abstraction Fixation Mismatch Hypothesis
- Landscape-Dependent Performance of Photonic Quantum Solvers in QUBO Feature Selection for Financial Risk Detection
- RADIUS-Assisted Companion PSK Discovery: Enabling WPA3- SAE in Externally Authenticated Multi-PSK (ePSK / MPSK / DPSK / iPSK / PPSK) Deployments
- IIIS: An Inter-Intelligence Intermediary Syntax for Shared Observation Across Perceptions
- MI-PEFT: Mixture-of-Experts Integrated Parameter-Efficient Fine-Tuning Protein Language Models Improves Acidophilic Proteins Classification