TLS 1.3 Adoption 2026: Growth Pace
Enterno.io scanned the top 10,000 global + top 1,000 Runet sites in March 2026. TLS 1.3 is deployed on 89% globally (up from 78% in 2024), 71% in Runet. The Runet gap is explained by legacy Cloudflare-competitor use (Yandex Cloud CDN supports 1.3 by default since 2024), while government sites and banks (58% still TLS 1.2 only). TLS 1.2 deprecation in PCI DSS 4.0 forces migration by 2025.
Below: key findings, platform breakdown, implications, methodology, FAQ.
Key Findings
| Metric | Pass/Value | Median | p75 |
|---|---|---|---|
| TLS 1.3 global (top-10k) | 89% | — | — |
| TLS 1.3 Runet (top-1k) | 71% | — | — |
| TLS 1.2 only (global) | 9% | — | — |
| TLS 1.2 only (Runet) | 24% | — | — |
| TLS 1.0/1.1 anywhere | 2% | — | — |
| TLS 1.3 0-RTT enabled | 41% | — | — |
| Full TLS 1.3 handshake | ~80ms | 80 | 150 |
| TLS 1.2 handshake | ~140ms | 140 | 250 |
Breakdown by Platform
| Platform | Share | Detail | — |
|---|---|---|---|
| Cloudflare-fronted sites | 34% | TLS 1.3: 100% | — |
| Government (.gov.ru) | 10% | TLS 1.3: 42% | — |
| Banking / Fintech | 8% | TLS 1.3: 68% | — |
| Yandex Cloud CDN | 12% | TLS 1.3: 94% | — |
| Self-hosted nginx | 21% | TLS 1.3: 64% | — |
Why It Matters
- TLS 1.3 ~60ms faster (1-RTT vs 2-RTT handshake) — LCP improves
- Perfect Forward Secrecy mandatory in 1.3 — lowers TLS hijacking risk
- PCI DSS 4.0 requires TLS 1.3 minimum since 2025 — banking must migrate
- Browser adoption 100% (Chrome 70+, Firefox 63+, Safari 12.1+) — server side is "last mile"
- Legacy clients: Java 8 < 1.8.0_261 lacks TLS 1.3 — enterprise integration may block
Methodology
TLS handshake scan via OpenSSL 3.0 + Go-based parallel scanner (10k sites per hour). Top lists from SimilarWeb + Alexa-like services. Handshake timing via connection time in openssl s_client. March 2026.
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Frequently Asked Questions
Do I need to explicitly enable TLS 1.3?
nginx 1.13+ with OpenSSL 1.1.1+ — TLS 1.3 default. You only need <code>ssl_protocols TLSv1.2 TLSv1.3;</code> (drop 1.0/1.1).
Is 0-RTT safe?
Replay attacks possible on idempotent requests. Enable only if you accept POST replay (GET is fine). Cloudflare enables it by default for GET.
When is TLS 1.2 deprecated?
Industry moves slowly. PCI DSS 4.0 requires 1.3 minimum since 2025. Browser deprecation not before 2027.
How to verify my TLS 1.3?
<a href="/en/ssl">Enterno SSL Checker</a> shows supported protocols. <code>openssl s_client -tls1_3</code> — manual test.