What this site is
qdayiscoming.com is an independent information resource tracking the Q-Day timeline — the moment a cryptographically relevant quantum computer will be able to break RSA encryption. The site aggregates timelines from leading research institutions — Google, NIST, NSA, and the Global Risk Institute — and makes them accessible to a broad audience.
The site was built on a simple premise: the transition to post-quantum cryptography is one of the most significant security migrations in history, yet most people — including most security professionals — are not tracking it closely enough. That gap is what this site exists to close.
What we track
Expert timelines and probability estimates for Q-Day, hardware milestones from Google, IBM, Microsoft, IonQ, Quantinuum, and PsiQuantum, NIST post-quantum standards and government migration deadlines, real-world attacks already in progress such as harvest now, decrypt later, and the state of post-quantum migration across industry and government.
Editorial approach
Every claim on this site is sourced to peer-reviewed research, official government publications, or statements from named researchers at major institutions. We do not speculate beyond what expert sources support.
Where timelines are uncertain — and they are — we present the range of credible estimates rather than a single number. The site is updated as new developments emerge. The most recent significant update incorporated Craig Gidney's revised qubit estimates (May 2025) and the AQTI JVG algorithm paper (March 2026), both of which materially changed the expert consensus on how close we are to Q-Day.
Contact
For corrections, research collaboration, or press inquiries: info@qdayiscoming.com
See also our privacy policy.