# Load balancers for enterprise buyers: what AI models recommend, October 2026 IT AI Recommendation Index, October 2026 Edition. Asked as "load balancer" and as "application delivery controller", six framings each, to fourteen models with search on, on behalf of an enterprise B2B company. Added to the October 2026 Edition on October 4, 2026; its answers are read by the distilled judge (ai-indexes-judge-qwen3-14b-run3), not the claude-opus-5 judge of the earlier categories. Page: https://it-ai-index.com/network/load-balancers/enterprise/ **Standing:** F5 BIG-IP leads with 40% of first choices; verdict contested. 48 first choices across the direct, paraphrase, budget and scale prompts. ## First-choice share | # | Product | Share | Negative rate | Labels | |---|---|---|---|---| | 1 | F5 BIG-IP | 40% | 23% | 52 | | 2 | HAProxy | 12% | 17% | 46 | | 3 | Cloudflare Load Balancing | 6% | 0% | 13 | | 4 | NGINX | 4% | 16% | 43 | | 5 | Kemp LoadMaster | 4% | 9% | 11 | | 6 | Citrix ADC | 0% | 23% | 26 | | 7 | Google Cloud Load Balancing | 0% | 15% | 20 | | 8 | A10 Thunder ADC | 0% | 15% | 13 | | 9 | AWS Elastic Load Balancing | 0% | 32% | 34 | | 10 | Azure Load Balancer | 0% | 38% | 26 | ## Each model's first choice on the direct prompt - Claude Haiku 4.5: F5 BIG-IP; alternatives AWS Elastic Load Balancing, Azure Load Balancer, HAProxy, NGINX - GPT-5.4 mini: F5 BIG-IP; alternatives Application Gateway, Application Load Balancer, Azure Load Balancer, Cloud Load Balancing - Gemini 3.5 Flash: VMware Avi Load Balancer; alternatives AWS Elastic Load Balancing, Cloudflare Load Balancing, F5 BIG-IP, F5 NGINX - Perplexity Sonar: HAProxy; alternatives Azure Load Balancer, Cloudflare Load Balancing, Load Balancer Enterprise ADC, Progress Kemp LoadMaster - Grok 4.1 Fast: F5 BIG-IP, HAProxy; alternatives AWS Elastic Load Balancing, Azure Application Gateway, Google Cloud Load Balancing, NGINX - Mistral Small: F5 BIG-IP, Kemp LoadMaster; alternatives Azure Load Balancer, Google Cloud Load Balancing, HAProxy - DeepSeek V4 Flash: F5 BIG-IP; alternatives AWS Elastic Load Balancing, Azure Load Balancer, Google Cloud Load Balancing, HAProxy - Llama 4 Maverick: no first choice - Qwen 3.7 Flash: F5 BIG-IP, F5 Distributed Cloud; alternatives Amazon Web Services, HAProxy, Microsoft Azure Application Gateway, NGINX - Kimi K2: F5; alternatives AWS Elastic Load Balancing, Azure Load Balancer, Google Cloud Load Balancing, HAProxy - GLM 4.7 FlashX: F5 BIG-IP; alternatives Citrix ADC, HAProxy, NGINX - MiniMax M2.5: F5 BIG-IP; alternatives AWS Elastic Load Balancing, F5 NGINX - GPT-6 Luna: AWS Application Load Balancer; alternatives AWS Network Load Balancer, Azure Application Gateway, Google Cloud Application Load Balancer - Muse Glimmer 30B: F5 BIG-IP; alternatives HAProxy, NGINX ## Sources the answers cite 73 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers: - guideflow.com: 42 answers, 53 citations - loadbalancer.org: 33 answers, 73 citations - f5.com: 32 answers, 69 citations - aws.amazon.com: 22 answers, 26 citations - learn.g2.com: 21 answers, 22 citations - xurrent.com: 21 answers, 21 citations - g2.com: 20 answers, 26 citations - nomios.com: 20 answers, 20 citations Pages named in the most answers: - https://guideflow.com/blog/load-balancer-software (33 answers) - https://loadbalancer.org/blog/whats-the-best-cloud-load-balancer (23 answers) - https://xurrent.com/blog/top-load-balancers (21 answers) - https://guideflow.com/et-ee/blog/load-balancer-software (20 answers) - https://nomios.com/news-blog/best-load-balancers-2024 (19 answers) - https://learn.g2.com/best-load-balancing-software (16 answers) - https://haproxy.com/products/haproxy-enterprise (15 answers) - https://myhospitalnow.com/blog/top-10-load-balancers-features-pros-cons-comparison (12 answers) - https://gartner.com/reviews/market/application-delivery-controllers (10 answers) - https://devopsschool.com/blog/top-10-load-balancers-features-pros-cons-comparison (9 answers) ## Warned against - F5 BIG-IP: 12 of 52 labels negative. "Critical zero-days exist in F5 BIG-IP APM, tracked as CVE-2026-94127, which allows unauthenticated remote code execution" (Claude Haiku 4.5, negative prompt) - AWS Elastic Load Balancing: 11 of 34 labels negative. "Large enterprises should avoid cloud-native load balancers from hyperscalers for complex, multi-cloud, or hybrid use cases" (Mistral Small, negative prompt) - Azure Load Balancer: 10 of 26 labels negative. "Large enterprises should avoid cloud-native load balancers from hyperscalers for complex, multi-cloud, or hybrid use cases" (Mistral Small, negative prompt) - HAProxy: 8 of 46 labels negative. "open-source or lightweight software proxies (like basic NGINX or HAProxy) that are powerful but risky for enterprise governance ... Why to Avoid:" (GLM 4.7 FlashX, negative prompt) ## Record - Method: https://it-ai-index.com/methodology/ - Raw judge labels and full responses: https://it-ai-index.com/data/ - License: CC BY 4.0. Cite as IT AI Recommendation Index, October 2026 Edition, it-ai-index.com.