Overview
JavaScript leads Jersey's secondary barriers
| Value | |
|---|---|
| WAF | 93.2% |
| Antibot | 20.1% |
| CAPTCHA | 26.4% |
| JavaScript | 42% |
| Rate Limiting | 13.1% |
| TLS | 16.8% |
WAF adoption (93.2%) matches the global norm. JavaScript is the leading secondary barrier at 42.0%, above the 41.3% global rate. CAPTCHA (26.4%) is elevated against its 23.1% global average. Antibot (20.1%), TLS (16.8%), and rate limiting (13.1%) sit close to average.
Barrier Landscape
JavaScript tops Jersey's active secondary barriers
| Value | |
|---|---|
| WAF | 93.2% |
| Antibot | 20.1% |
| CAPTCHA | 26.4% |
| JavaScript | 42% |
| Rate Limiting | 13.1% |
| TLS | 16.8% |
| Has robots.txt | 80.6% |
| Blocks AI crawlers | 12.7% |
WAF adoption stands at 93.2%. Among secondary barriers, JavaScript leads at 42.0%. CAPTCHA (26.4%) is above its 23.1% global rate. Antibot (20.1%), TLS (16.8%), and rate limiting (13.1%) follow.
Most Jersey sites carry two barriers
| % of sites | |
|---|---|
| 0 barriers | 4.3% |
| 1 barrier | 29.8% |
| 2 barriers | 34.5% |
| 3 barriers | 18.4% |
| 4 barriers | 7.6% |
| 5 barriers | 5% |
| 6 barriers | 0.4% |
4.3% of Jersey sites carry no barriers. The modal count is two, affecting 34.5% of sites. Sites with three or more barriers account for 31.4% of the total.
Most Jersey sites are Simple to access
| Mean recommended tier | |
|---|---|
| All sites | 1.6 |
The median recommended retrieval tier is 1, meaning over half of sites are accessible without JavaScript rendering. The mean tier is 1.65.
Nearly nine in ten Jersey sites are Simple or Easy to access
| % of sites | |
|---|---|
| 1 - Simple | 52.1% |
| 2 - Easy | 34.6% |
| 3 - Moderate | 10.1% |
| 4 - Complex | 2.3% |
| 5 - Advanced | 0.9% |
Tier 1 and Tier 2 combined account for 86.7% of Jersey sites. Tier 3 applies to 10.1%, Tier 4 to 2.3%, and Tier 5 to 0.9%.
robots.txt
AI crawlers top Jersey's robots.txt bot categories
| % of sites | |
|---|---|
| AI crawlers | 14.8% |
| SEO / search indexing | 12.2% |
| SEO audit tools | 14.6% |
| Commercial scrapers | 7.3% |
| Social / content scrapers | 6.7% |
| Archive / research crawlers | 4.7% |
| Monitoring / uptime bots | 0.7% |
Across all 966 Jersey sites, 14.8% name at least one AI crawler. SEO audit tools are close behind at 14.6%, and SEO/search indexing bots at 12.2%. Commercial scrapers appear in 7.3% of files.
Uniform rules are Jersey's most common robots.txt posture
| % of sites | |
|---|---|
| Uniform per-agent rules (no path mixing) | 40.4% |
| Path-level mixed rules for same agent | 34.1% |
| Allow-only (no disallow rules) | 2.6% |
| Mixed AI posture (block some, allow others) | 2.8% |
| Blanket Disallow: / | 3.4% |
19.4% of Jersey sites have no robots.txt. Among those that do, uniform per-agent rules are the leading posture at 40.4%, followed by path-level mixed rules at 34.1%. Blanket Disallow: / covers 3.4% and mixed-AI posture 2.8%.
GPTBot faces the most Disallow rules in Jersey's robots.txt
| Disallowed | Allowed (whitelisted) | |
|---|---|---|
| GPTBot | 10.6% | 2.8% |
| CCBot | 8% | 1.1% |
| ClaudeBot | 8.1% | 1.3% |
| Google-Extended | 8% | 2% |
| Bytespider | 5.8% | 0.5% |
| meta-externalagent | 2.9% | 0.1% |
| ChatGPT-User | 5.6% | 3.1% |
| PerplexityBot | 5.4% | 2.6% |
| Applebot-Extended | 4.7% | 0.4% |
| OAI-SearchBot | 3.8% | 2.1% |
| anthropic-ai | 4.2% | 0.9% |
GPTBot carries a Disallow rule on 10.6% of all 966 Jersey sites. ChatGPT-User appears in an Allow rule on 3.1% of sites.
Four Jersey sectors all name at least one bot to restrict
| % of sites | |
|---|---|
| Computer & Video Games | 100% |
| Design | 100% |
| Entertainment | 100% |
| Healthcare | 100% |
| Adult | 90% |
| Apparel & Fashion | 90% |
| Beauty & Cosmetics | 90% |
| Events | 90% |
| Food & Beverages | 90% |
| General | 90% |
| Mass Media | 90% |
| Newspapers | 90% |
| Online Services | 90% |
| Performing Arts | 90% |
| Publishing | 90% |
Computer & Video Games, Design, Entertainment, and Healthcare each reach 100%: every site in those sectors names at least one bot to restrict in a Disallow rule. Nine further sectors sit at 90%.
Jersey's Airlines sites lead in explicitly allowing crawlers
| % of sites | |
|---|---|
| Airlines | 80% |
| Veterinary | 80% |
| Ceramics & Pottery | 75% |
| Photography | 70% |
| Publishing | 70% |
| Foreign Language | 66.7% |
| Market Research | 62.5% |
| Apparel & Fashion | 60% |
| Architecture | 60% |
| Civil Engineering | 60% |
| Construction | 60% |
| Education | 60% |
| Furniture | 60% |
| Hospitality | 60% |
| Jewellery & Luxury | 60% |
Airlines leads by a narrow margin: 80% of sites in this industry explicitly allow at least one named crawler, reflecting commercial demand for indexing and aggregation. Veterinary follows at 80%.
Industry Patterns
Real Estate is Jersey's hardest sector to access programmatically
| WAF | Antibot | CAPTCHA | JavaScript | Rate Limit | TLS | robots.txt | Blocks AI | Tier | |
|---|---|---|---|---|---|---|---|---|---|
| Real Estate | 100% | 20% | 30% | 80% | 50% | 10% | 60% | 20% | Tier 3 |
| Wine & Spirits | 100% | 40% | 30% | 30% | 40% | 10% | 60% | 20% | Tier 3 |
| Computer Hardware | 90% | 10% | 0% | 30% | 20% | 30% | 90% | 10% | Tier 2 |
| Hospitality | 90% | 30% | 0% | 60% | 20% | 40% | 70% | 10% | Tier 2 |
| Jewellery & Luxury | 100% | 20% | 20% | 40% | 40% | 70% | 70% | 0% | Tier 2 |
| Apparel & Fashion | 90% | 0% | 20% | 50% | 20% | 30% | 100% | 10% | Tier 2 |
| Beauty & Cosmetics | 70% | 10% | 10% | 50% | 40% | 30% | 90% | 10% | Tier 2 |
| Computers & Electronics | 90% | 30% | 20% | 50% | 20% | 20% | 70% | 10% | Tier 2 |
| Retail | 100% | 0% | 0% | 70% | 20% | 10% | 90% | 50% | Tier 2 |
| Consumer Electronics | 80% | 20% | 10% | 40% | 20% | 30% | 70% | 10% | Tier 2 |
| Human Resources | 100% | 60% | 40% | 40% | 50% | 20% | 70% | 0% | Tier 2 |
| Pharmaceuticals | 100% | 40% | 40% | 60% | 40% | 20% | 80% | 10% | Tier 2 |
| Sporting Goods | 70% | 0% | 20% | 30% | 0% | 30% | 80% | 10% | Tier 2 |
| Banking | 100% | 30% | 20% | 30% | 10% | 20% | 70% | 10% | Tier 2 |
| Restaurants | 80% | 20% | 20% | 40% | 40% | 20% | 70% | 20% | Tier 2 |
Real Estate leads the hardest-sectors ranking. Computer Hardware is next, followed by Wine & Spirits, Hospitality, and Jewellery & Luxury — all three sharing the same mean tier. Banking and Restaurants sit at the accessible end of the top 15.
Six Jersey sectors share the most accessible tier floor
| WAF | Antibot | CAPTCHA | JavaScript | Rate Limit | TLS | robots.txt | Blocks AI | Tier | |
|---|---|---|---|---|---|---|---|---|---|
| Transport & Logistics | 80% | 30% | 10% | 30% | 0% | 20% | 90% | 0% | Tier 2 |
| Food & Beverages | 100% | 30% | 40% | 50% | 30% | 0% | 90% | 40% | Tier 2 |
| Education | 100% | 20% | 10% | 30% | 10% | 10% | 70% | 10% | Tier 2 |
| Equipment & Supplies | 90% | 30% | 20% | 30% | 20% | 0% | 70% | 10% | Tier 2 |
| Machinery | 90% | 10% | 20% | 30% | 0% | 0% | 90% | 10% | Tier 2 |
| Mail & Delivery | 80% | 20% | 20% | 20% | 10% | 20% | 80% | 0% | Tier 2 |
| Recruitment & Staffing | 90% | 40% | 20% | 50% | 0% | 20% | 70% | 10% | Tier 2 |
| Construction | 80% | 0% | 10% | 50% | 0% | 0% | 80% | 0% | Tier 2 |
| Furniture | 100% | 30% | 50% | 40% | 0% | 40% | 90% | 0% | Tier 2 |
| Advertising & Mktg | 100% | 30% | 60% | 50% | 0% | 30% | 90% | 10% | Tier 2 |
| Design | 100% | 30% | 40% | 40% | 30% | 30% | 100% | 40% | Tier 2 |
| Insurance | 90% | 50% | 40% | 40% | 40% | 10% | 60% | 0% | Tier 2 |
| Telecom | 90% | 0% | 0% | 70% | 0% | 10% | 90% | 10% | Tier 2 |
| TV & Film | 100% | 20% | 30% | 40% | 10% | 10% | 80% | 20% | Tier 2 |
| Wholesalers | 90% | 20% | 20% | 60% | 20% | 20% | 80% | 0% | Tier 2 |
Advertising & Marketing, Design, Insurance, Telecom, TV & Film, and Wholesalers all share the lowest mean tier of 1.80 among Jersey sectors in this group.