# Astra Security vs UnderDefense: which do AI models recommend for ptaas, October 2026

IT AI Recommendation Index, October 2026 Edition, Penetration testing as a service. Zero of fourteen models named Astra Security first on the direct prompt; two named UnderDefense. Page: https://it-ai-index.com/security/penetration-testing-as-a-service/astra-security-vs-underdefense/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Astra Security | 4% | #4 of 10 | 0% | 17 | 11 of 14 |
| UnderDefense | 4% | #5 of 10 | 0% | 11 | 7 of 14 |

## The direct prompt, model by model

- GLM 4.7 FlashX: underdefense first (first choices: Cobalt, UnderDefense) (alternatives: BreachLock, NetSPI, Packetlabs)
- MiniMax M2.5: underdefense first (first choices: BreachLock, UnderDefense) (alternatives: Raxis, Synack)
- Gemini 3.5 Flash: neither first, one named (first choices: Cobalt) (alternatives: BreachLock, NetSPI, UnderDefense)
- DeepSeek V4 Flash: neither first, one named (first choices: Cobalt, Raxis) (alternatives: BreachLock, Packetlabs, UnderDefense)
- Qwen 3.7 Flash: neither first, one named (first choices: Red Siege Security) (alternatives: Astra Security, BreachLock, Lumina.io, Netragard)
- Muse Glimmer 30B: neither first, one named (first choices: Cobalt) (alternatives: Astra Security, HackerOne, Netragard, Red Siege, UnderDefense)
- Claude Haiku 4.5: neither named (first choices: BreachLock, Cobalt) (alternatives: Packetlabs, Raxis, Stingrai)
- GPT-5.4 mini: neither named (first choices: Cobalt) (alternatives: Cognisys, Trava Security)
- Perplexity Sonar: neither named (first choices: BreachLock) (alternatives: Cobalt, Raxis, Stingrai)
- Grok 4.1 Fast: neither named (first choices: BreachLock) (alternatives: Bright Defense, NetSPI, Packetlabs, Prescient Security)
- Mistral Small: neither named (first choices: BreachLock, Cobalt) (alternatives: NetSPI, Stingrai, Synack)
- Llama 4 Maverick: neither named
- Kimi K2: neither named (first choices: Cobalt) (alternatives: BreachLock, Coalfire, Praetorian)
- GPT-6 Luna: neither named (first choices: Cobalt) (alternatives: Bishop Fox, NetSPI)

## What the models said about Astra Security

- "like vPenTest or Astra Pentest. These are generally cheaper than fully manual consulting and are designed for SMBs." (GPT-5.4 mini, budget prompt, first choice)
- "Astra Security – Best overall, offering web and mobile applications, cloud infrastructure, API, and network testing." (Mistral Small, comparative prompt, first choice)
- "1. Astra Security - Price: Starting at ~$1,999/year ... expert remediation included, strong compliance support" (Kimi K2, comparative prompt, first choice)

## What the models said about UnderDefense

- "I'd recommend BreachLock or UnderDefense as they specifically target mid-market companies" (MiniMax M2.5, direct prompt, first choice)
- "UnderDefense or Cobalt offer the best balance of pricing, quality, and scalability" (GLM 4.7 FlashX, direct prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.