Mind the GapTHE POST-QUANTUM WEB
A research companion · IMC 2026Read the paper
03DEPLOYMENT AGENCY

The platforms behind the progress.

A website can gain a new cryptographic capability through its hosting platform. Adoption is highly concentrated among domains whose TLS settings appear to be managed by infrastructure providers.

93.92%of March hybrid deployments attributed to provider management
Among 336,919 hybrid deployments
4.58%attributed to owner management
Among 336,919 hybrid deployments
61,865domains with unknown management
Among 684,494 stable-panel domains

Adoption within each management group

What share of each category chose hybrid key exchange in March 2026?

  • Provider managedn = 416,669 domains75.94%
  • Owner managedn = 205,960 domains7.49%
  • Unknownn = 61,865 domains8.21%

These percentages use each category’s own denominator. Paper, §6.2 and Appendix C

Where the hybrid deployments are hosted

Cloudflare, Amazon, and Fastly account for the largest shares.

  • Cloudflare57.34%
  • Amazon14.01%
  • Fastly13.14%
  • Squarespace3.52%
  • Automattic2.37%
  • Google1.67%
  • Incapsula0.98%
  • Hostinger0.90%
  • Team Internet0.80%
  • Others5.27%

n = 336,919 hybrid deployments. Paper, Figure 2(a)

A shared platform can move many websites at once.

A single upgrade by a CDN or cloud provider can enable post-quantum support across many customer endpoints at once, helping explain the concentration of adoption.

CONTINUE EXPLORING

Where does adoption show up?

Compare the everyday services that use these platforms.