Overview
JavaScript is Czechia's most elevated secondary barrier
| Value | |
|---|---|
| WAF | 93.4% |
| Antibot | 20.6% |
| CAPTCHA | 23% |
| JavaScript | 44.1% |
| Rate Limiting | 12.5% |
| TLS | 16.7% |
WAF reaches 93.4%, in line with the global 93.1%. Among secondary barriers, JavaScript (44.1%) is notably above the global 41.3%. CAPTCHA (23.0%), Antibot (20.6%), TLS (16.7%), and Rate Limiting (12.5%) are all near-global.
Barrier Landscape
JavaScript tops Czechia's active secondary defences
| Value | |
|---|---|
| WAF | 93.4% |
| Antibot | 20.6% |
| CAPTCHA | 23% |
| JavaScript | 44.1% |
| Rate Limiting | 12.5% |
| TLS | 16.7% |
| Has robots.txt | 81.6% |
| Blocks AI crawlers | 14.7% |
WAF is present on 93.4% of Czech sites. Among secondary barriers, JavaScript (44.1%) leads and is above the global average of 41.3%. CAPTCHA (23.0%) and Antibot (20.6%) follow.
Most Czech sites carry at least two barriers
| % of sites | |
|---|---|
| 0 barriers | 4.4% |
| 1 barrier | 29.3% |
| 2 barriers | 35.4% |
| 3 barriers | 17.9% |
| 4 barriers | 8.6% |
| 5 barriers | 4.1% |
| 6 barriers | 0.3% |
35.4% of Czech sites carry exactly two barriers — the modal count. Single-barrier sites account for 29.3%; 4.4% have none. Sites with three or more barriers total 30.9%.
Most Czech sites are Easy to access
| Mean recommended tier | |
|---|---|
| All sites | 1.6 |
The median recommended tier is 2, meaning fewer than half of sites are accessible via plain HTTP. The mean tier is 1.65.
Nearly nine in ten Czech sites are Simple or Easy to access
| % of sites | |
|---|---|
| 1 - Simple | 49.9% |
| 2 - Easy | 39% |
| 3 - Moderate | 8.1% |
| 4 - Complex | 2% |
| 5 - Advanced | 1% |
Tier 1 accounts for 49.9% of sites and Tier 2 for 39.0%, combining to 88.9%. Tier 3 covers 8.1%, Tier 4 2.0%, and Tier 5 1.0%.
robots.txt
AI crawlers top Czechia's robots.txt bot categories
| % of sites | |
|---|---|
| AI crawlers | 16.3% |
| SEO / search indexing | 12.9% |
| SEO audit tools | 14.6% |
| Commercial scrapers | 8.3% |
| Social / content scrapers | 6.2% |
| Archive / research crawlers | 5.1% |
| Monitoring / uptime bots | 0.5% |
Across all 1,110 Czech sites, 16.3% name at least one AI crawler. SEO audit tools follow at 14.6% and SEO/search indexing bots at 12.9%.
Uniform rules are Czechia's most common robots.txt posture
| % of sites | |
|---|---|
| Uniform per-agent rules (no path mixing) | 44.8% |
| Path-level mixed rules for same agent | 31.8% |
| Allow-only (no disallow rules) | 2.2% |
| Mixed AI posture (block some, allow others) | 2.6% |
| Blanket Disallow: / | 2.6% |
44.8% of Czech sites use uniform per-agent rules — the highest share among named postures. Path-level mixed rules apply to 31.8%. Blanket Disallow: / and mixed AI posture each cover 2.6%. 18.4% of sites have no robots.txt.
GPTBot faces the most Disallow rules in Czechia's robots.txt
| Disallowed | Allowed (whitelisted) | |
|---|---|---|
| GPTBot | 12.2% | 2.1% |
| CCBot | 9.3% | 0.9% |
| ClaudeBot | 8.6% | 1.2% |
| Google-Extended | 8.6% | 1.2% |
| Bytespider | 7.3% | 0.4% |
| meta-externalagent | 3% | 0.2% |
| ChatGPT-User | 6.4% | 2.5% |
| PerplexityBot | 5.9% | 2% |
| Applebot-Extended | 5% | 0.5% |
| OAI-SearchBot | 4% | 1.8% |
| anthropic-ai | 5.3% | 0.9% |
GPTBot is named in a Disallow rule on 12.2% of all Czech sites — the highest block rate of any AI agent. ChatGPT-User leads the allow side at 2.5% of all sites.
Six Czech sectors all name at least one bot to restrict
| % of sites | |
|---|---|
| Computer & Video Games | 100% |
| Design | 100% |
| Entertainment | 100% |
| Newspapers | 100% |
| Retail | 100% |
| Visual Art | 100% |
| Adult | 90% |
| Automotive | 90% |
| Beauty & Cosmetics | 90% |
| Comics & Animation | 90% |
| Construction | 90% |
| Consulting | 90% |
| General | 90% |
| Machinery | 90% |
| Mass Media | 90% |
Computer & Video Games, Design, Entertainment, Newspapers, Retail, and Visual Art each have 100% of their sites naming at least one bot to restrict in a Disallow rule.
Czechia's Automotive sector leads in explicitly allowing crawlers
| % of sites | |
|---|---|
| Automotive | 80% |
| Airlines | 70% |
| Architecture | 70% |
| Investment | 70% |
| Pharmaceuticals | 70% |
| Photography | 70% |
| Publishing | 70% |
| Retail | 70% |
| Science | 70% |
| Travel & Tourism | 70% |
| Construction | 60% |
| Graphic Design | 60% |
| Public Policy | 60% |
| Public Relations | 60% |
| Software & Dev | 60% |
Automotive has the highest explicit allow rate at 80% of sites naming at least one bot to allow. Airlines, Architecture, Investment, and six others follow at 70%.
Industry Patterns
Jewellery & Luxury is Czechia's hardest sector to access programmatically
| WAF | Antibot | CAPTCHA | JavaScript | Rate Limit | TLS | robots.txt | Blocks AI | Tier | |
|---|---|---|---|---|---|---|---|---|---|
| Jewellery & Luxury | 100% | 20% | 20% | 30% | 50% | 50% | 70% | 0% | Tier 3 |
| Human Resources | 100% | 80% | 60% | 50% | 40% | 20% | 70% | 10% | Tier 3 |
| Hospitality | 90% | 20% | 0% | 50% | 30% | 50% | 70% | 20% | Tier 3 |
| Computer Hardware | 90% | 10% | 0% | 20% | 20% | 20% | 80% | 10% | Tier 2 |
| Real Estate | 100% | 20% | 10% | 50% | 30% | 10% | 70% | 30% | Tier 2 |
| Retail | 100% | 0% | 0% | 60% | 30% | 20% | 100% | 40% | Tier 2 |
| Apparel & Fashion | 90% | 10% | 20% | 50% | 20% | 30% | 80% | 10% | Tier 2 |
| Beauty & Cosmetics | 90% | 40% | 30% | 40% | 20% | 20% | 90% | 30% | Tier 2 |
| Customer Services | 100% | 20% | 30% | 70% | 40% | 20% | 60% | 0% | Tier 2 |
| Restaurants | 90% | 40% | 20% | 60% | 40% | 20% | 60% | 10% | Tier 2 |
| Telecom | 90% | 0% | 0% | 60% | 0% | 10% | 90% | 10% | Tier 2 |
| Automotive | 100% | 0% | 10% | 60% | 20% | 30% | 100% | 10% | Tier 2 |
| Consumer Electronics | 90% | 20% | 20% | 60% | 20% | 20% | 70% | 10% | Tier 2 |
| Design | 100% | 20% | 30% | 40% | 20% | 30% | 100% | 30% | Tier 2 |
| Machinery | 100% | 10% | 10% | 60% | 0% | 0% | 100% | 20% | Tier 2 |
Jewellery & Luxury has a mean recommended tier of 3.00. Human Resources follows at 2.60, then Computer Hardware at 2.55. Hospitality, Real Estate, and Retail all share a mean of 2.50.
Three Czech sectors share the most accessible floor
| WAF | Antibot | CAPTCHA | JavaScript | Rate Limit | TLS | robots.txt | Blocks AI | Tier | |
|---|---|---|---|---|---|---|---|---|---|
| Mail & Delivery | 70% | 40% | 10% | 10% | 0% | 20% | 80% | 0% | Tier 2 |
| Medical Devices | 90% | 10% | 20% | 50% | 20% | 10% | 100% | 0% | Tier 2 |
| Printing | 100% | 10% | 20% | 20% | 0% | 10% | 100% | 0% | Tier 2 |
| Public Safety | 100% | 40% | 40% | 60% | 20% | 30% | 90% | 10% | Tier 2 |
| Recruitment & Staffing | 100% | 50% | 50% | 40% | 0% | 20% | 70% | 30% | Tier 2 |
| Transport & Logistics | 70% | 50% | 10% | 20% | 0% | 20% | 80% | 0% | Tier 2 |
| Adult | 100% | 40% | 30% | 80% | 10% | 20% | 90% | 10% | Tier 2 |
| Education | 100% | 20% | 20% | 30% | 10% | 10% | 70% | 10% | Tier 2 |
| Import & Export | 100% | 30% | 30% | 50% | 0% | 30% | 80% | 10% | Tier 2 |
| Manufacturing | 80% | 20% | 30% | 50% | 0% | 30% | 80% | 10% | Tier 2 |
| Visual Art | 100% | 30% | 20% | 30% | 0% | 20% | 100% | 20% | Tier 2 |
| Food & Beverages | 100% | 30% | 20% | 60% | 30% | 0% | 80% | 30% | Tier 2 |
| Computers & Electronics | 90% | 10% | 20% | 30% | 0% | 20% | 70% | 20% | Tier 2 |
| Crafts | 100% | 40% | 40% | 50% | 10% | 10% | 80% | 30% | Tier 2 |
| Events | 90% | 10% | 10% | 90% | 30% | 0% | 60% | 0% | Tier 2 |
Computers & Electronics, Crafts, and Events all record a mean tier of 1.80 — the lowest value in the bottom-industries group.